golang check if port is open

We can use net/http to create a web app in Go. All Languages >> Whatever >> how to check if port is open cmd without telnet how to check if port is open cmd without telnet Code Answer. A password can be used, the encryption is divided into two parts, one part is whether the local (-z) encryption and decryption, and the part is the encryption and decryption with the upstream (-Z) transmission. Now we want to use pc and vps01 and vps02 to build an encrypted channel. proxy tcp -t tls -p ":28080" -T tls -P "22.22.22.22:38080" -C proxy.crt -K proxy.key proxy socks -T tcp -P 2.2.2.2:7777 -M -t tcp -m -p :8888 In view of this situation, the project adopts the source. Then access the local port 8080 is to access the proxy port 38080 on the VPS. For example: proxy socks -t tcp -p "0.0.0.0:38080" --udp-port 38080. Access to port 80 of company machine A via an encrypted tunnel. Part of it is compressed with the upstream (-M) transmission. proxy help server The -J parameter can help you to connect the server or client to the bridge via https or socks5. A tag already exists with the provided branch name. Then add the iptables rule, here are the reference rules: --dns-address and --dns-ttl parameters, used to specify the dns (--dns-address) used by the proxy to access the domain name. Fast2:--nodelay=1 --interval=20 --resend=2 --nc=1 proxy socks -T tcp -P 2.2.2.2:777 -Z demo_password -t tcp -p :8080 Suppose there is already a normal SS or SPS proxy (ss is enabled, encryption: aes-256-cfb, password: demo): 127.0.0.1:8080, now we turn it to support both http(s) and socks5 and The ordinary proxy of ss, the converted local port is 18080, the converted ss encryption mode: aes-192-cfb, ss password: pass. You can use the parameter --udp-port port number to fix the port number of the UDP function. proxy http -p ":33080" --dns-address "8.8.8.8:53" --dns-ttl 300. Secondary HTTP proxy (local Linux) see if server is listening on port. Suppose --auth-url http://127.0.0.1:333/auth.php points to a php interface address. The base64 encoding at the beginning of "base64://" is the content of the file described in a above, for example: base64://ajfpoajsdfa=, c. "str://" multiple keywords separated by a comma at the beginning, such as: str://default,company,school, Senat type judgment, easy to check whether the network supports p2p, you can execute: proxy tools -a nattype, proxy help bridge The proxy's blocked, direct, stop, only, hosts, resolve.rules, rewriter.rules, ip.allow, ip.deny files support protocol loading. It can also be placed in a file in the format of a "username:password" and then specified with -F. IP dimension, which controls the single connection rate and controls the maximum number of connections, max connections count per seconds (QPS). Other versions may not be applicable. The command line name for each parameter, along with the default values and simple function descriptions are as follows: Tip: If you need smashing performance, get yourself some Gin. When the user connects, the proxy will request the url ("http://test.com/auth.php") in GET mode. WebIn this article I will share examples to check port status and open a port in Linux. The sps itself does not provide the proxy function. sudo ufw allow 80/tcp means allow TCP connections to port 80. , [2000:0:0:0:0:0:0:1]:8080. proxy tcp -p ":28080" -T tcp -P "22.22.22.22:38080" WebGin is a HTTP web framework written in Go (Golang). parent-type : upper-level transport type, support tcp, tls, ws, wss. Set by parameter --udp-port 0, 0 represents a free port is randomly selected, or you can manually specify a specific port. Take five parameters: user, pass, ip, local_ip, target: Execute on level 1 vps (ip: 2.2.2.2): proxy tcp -t tls -p ":38080" -T tcp -P "66.66.66.66:8080" -C proxy.crt -K proxy.key Assuming the proxy is now running on the router, the startup command is as follows: There are a total of 17 KCP configuration parameters, you can not set them, they have default values, if for the best effect, Connection number is the maximum number of connections for the user. The Go extension allows you to launch or attach to Go programs for debugging. Primary TCP proxy VPS_01, IP: 22.22.22.22 Another awesome book for learning Web Development in Golang. At this time, the port in the parameter -P uses 0. It only accepts the proxy request to "convert and forward" to the existing http(s) proxy or the socks5 proxy or ss proxy; the sps can put the existing http(s) proxy or socks5 proxy or ss proxy is converted to a port that supports both http(s) and socks5 and ss proxies, and the http(s) proxy supports forward proxy and reverse proxy (SNI), converted SOCKS5 proxy, UDP function is still supported when the upper level is SOCKS5 or SS; in addition, for the existing http(s) proxy or socks5 proxy, three modes of tls, tcp, and kcp are supported, and chain connection is supported, that is, multiple sps node levels can be supported. You can select the upstream by using the destination address of the access --lb-hashtarget. Multiple users can repeat multiple -a parameters. When the user connects, the proxy will request the url ("http://test.com/auth.php") in GET mode. If the returned data contains both: user or ip, and conns, then the user or ip will be ignored, and only the connection matching conns will be disconnected. In addition, the IP part of the --bind-ip parameter supports specifying the network interface name, wildcards, and more than one can be specified. In this way, when the website is accessed through the local agent 8080, the target website is accessed through encrypted transmission with the upstream. Suppose your vps external network ip is 23.23.23.23. Suppose there is a upstream agent: 2.2.2.2:33080 Support speed limit, HTTP(S)\SOCKS5\SPS\TCP proxy supports speed limit. If the installation fails or your vps is not a linux64-bit system, follow the semi-automatic steps below to install: Download address: https://github.com/snail007/goproxy/releases/latest. Configure the domain name wx-dev.xxx.com to the specific directory. The converted local port is 18080, ss encryption: aes-192 -cfb, ss password: pass. Comparison between the features of the free version and the commercial version, detailed operations on how to purchase and use the commercial version please click here to view. In this way, when the website is accessed through the local agent 8080, the target website is accessed through compression with the upstream. Dynamic selection of upstream proxies, through the external API, HTTP (S), SOCKS5, SPS proxies can achieve user-based or IP-based speed limit, connection limit, dynamic access to upstream. Then start the server and add the parameter --server-id=the ID of the mapping rule to count the traffic. iprate: The single TCP connection rate limit of the client IP, in bytes/second, not limited to 0 or not set this header. 3. If your VPS is a Linux 64-bit system, you only need to execute the following sentence to complete the automatic installation and configuration. This parameter specifies a file, one rule per line, and the beginning of # is gaze. Execute on the secondary vps (ip: 3.3.3.3): 127.0.0.1:100:10240:http://192.168.1.1:3100 If a iptables transparent proxy is performed on the gateway device, the device that is connected through the gateway can realize a non-aware proxy. Just be the only one on the same bridge. 2.2.2.2:33080 is the upstream address, the format is: IP (or domain name): port , if the underlying is ws/wss protocol can also bring the path, such as: 2.2.2.2: 33080/ws; This is typically called a server. Local execution: Rule interpretation: Because the kcp configuration is complex, it requires a certain network basics. Fast :--nodelay=0 --interval=30 --resend=2 --nc=1 Cache authentication results, time can be set to reduce API pressure. This parameter specifies a file, one line per rule, in the format: "username: password: number of connections: rate: upstream". Here it is assumed that there is an http superior proxy 1.1.1.1:33080, which uses ws to transmit data. proxy sps -T tcp -P 3.3.3.3:8888 -M -t tcp -p :8080 If the incorrect IP is bound, the proxy will not work. The default is: 127.0.0.1; Sometimes the network where the server or client is located cannot directly access the external network. proxy http -t tls -p ":38080" -C proxy.crt -K proxy.key The encryption methods supported by the ss function are: aes-128-cfb, aes-128-ctr, aes-128-gcm, aes-192-cfb, aes-192-ctr, aes-192-gcm, aes-256- Cfb , aes-256-ctr , aes-256-gcm , bf-cfb , cast5-cfb , chacha20 , chacha20-ietf , chacha20-ietf-poly1305 , des-cfb , rc4-md5 , rc4-md5-6 , salsa20 , Xchacha20. The above mentioned multiple sps nodes can be connected to build encrypted channels in a hierarchical connection, assuming the following vps and the home PC. Connection limit priority: User authentication file limit - "File ip.limit limit -" API user limit - "API IP limit -" command line global connection limit. Variables declared without an explicit initial value are given their zero value. When i hit sudo netstat -plnt it returns : The X-Forwarded-For and X-Real-IP values are the client IP, so the backend http service can easily obtain the real IP address of the client. When the VPS is behind the nat device, the vps network interface IP is the intranet IP. client_addr: client address, format: IP: port. The proxy's http(s)/socks5/sps proxy API function is controlled by three parameters: --auth-url and --auth-nouser and --auth-cache. The format of the server-http-host parameter is as follows: --http-host www.test.com:80@2200, if the server listens to multiple ports, just repeat the --http-host parameter to set the HOST for each port. If it is not accessible, it will go to the upstream SOCKS proxy. Sps supports http(s)\socks5 proxy authentication, which can be cascaded and has four important pieces of information: On the "last level proxy proxy" machine, because the proxy is to be disguised as all websites, the default HTTP port of the website is 80, HTTPS is 443, and the proxy can listen to ports 80 and 443. For example, the machine has IP 5.5.5.5, 6.6.6.6, and monitors two ports 8888 and 7777, the command is as follows: proxy socks -t tcp -p :8888,:7777 --bind-ip 5.5.5.5:7777 --bind-ip 6.6.6.6:8888. DNS is known as the service provided by UDP port 53, but with the development of the network, some well-known DNS servers also support TCP mode dns query, such as Google's 8.8.8.8, the DNS anti-pollution server principle of the proxy is to start a proxy DNS proxy locally. Download the automatic installation script. SOCKS5 proxies supports cascading certification. Secondary HTTP proxy (local Linux) There was a problem preparing your codespace, please try again. All the communication and the upstream communication in this tutorial are encrypted, and the certificate file is required. So, you must send some data to the server, and the data should be in the right format that will cause the server to response something to it. Debugging. In addition, it supports custom encryption after tls and kcp, which means that custom encryption and tls|kcp can be used together. Once installed, you can use nmap using the following syntax to test port connectivity from one proxy socks -t tcp -m -p :7777 You can set an http interface address through the parameter --traffic-url. Custom encryption requires both sides to be proxy. By default, the port number of the UDP function of ss's socks5 is specified by the rfc1982 draft. proxy socks -t kcp -p :33080 -z password The HTTP(S)\SOCKS5\SPS\TCP proxy supports the client to connect with the ingress IP, and uses the ingress IP as the egress IP to access the target website. The conns value is a json string, the format is a sequence of connections, the element is an object, the object contains the details of the connection, Only when the traffic is reported will the report be considered successful, and if it response other status codes, it will be considered that the reported traffic failed, and the log will be output. The proxy will report the traffic used for this connection to this address.Specifically, the proxy sends an HTTP to GET request to the HTTP URL address set by --traffic-url. Peculiar local addresses/ports connected to unknown foreign IP proxy http -t tls -p ":28080" -T tls -P "22.22.22.22:38080" -C proxy.crt -K proxy.key check listening port windows server. proxy udp -p ":33080" -T udp -P "192.168.22.33:2222" -B, Intranet penetration, divided into two versions, "multi-link version" and "multiplexed version", generally like a web service, this service is not a long-term connection, it is recommended to use "multi-link version", if it is to keep long The time connection suggests using a "multiplexed version.". proxy http -t tls -C proxy.crt -K proxy.key -p :33080 proxy tcp -p ":23080" -T tls -P "22.22.22.33:33080" -C proxy.crt -K proxy.key It can be reported in the normal mode or in the fast mode. The contents of auth.php are as follows: userconns: The maximum number of connections for the user, not limited to 0 or not set this header. Then the connection of the 33080 port will connect to the 33080 port of 192.168.22.33, and the other ports are similar. For security, we use encrypted communication. If the domain name to be resolved is not found in 1, it is parsed using the parameter --forward rule. Client service parameters can use placeholders: {AGENT_ID} to refer to the agents id as the clients key, so as to ensure that each client has a unique key. proxy udp -p ":5353" -T tcp -P "22.22.22.33:33080" The following command sets 23.23.23.23 with the -g parameter. Please use the command according to your own instructions. --auth-file, --max-conns, --ip-limit, --rate-limit, -a These five parameters control. After the original author of the library suggested migrating the maintenance of jwt-go, a dedicated team of open source maintainers decided to clone the existing library into this repository. Chained proxies, the program itself can be used as an proxies, and if it is set up, it can be used as a secondary proxies or even an N-level proxies. For example, limit the connection rate of each tcp to 100k/s: The parameter --auth-url is the HTTP API interface address. Primary TCP proxy VPS_01, IP: 22.22.22.22 The next tutorial will introduce the usage method through the command line parameters, or you can get the parameters by reading the configuration file. When the server is connected to the bridge, if there are multiple clients connecting to the same bridge at the same time, you need to use the --k parameter to select the client. ScyllaHide by Aguila & cypher: Open-source user-mode Anti-Anti-Debug plugin. For example, if you redirect to "target": demo.com:80 to 192.168.0.12:80, then the client visits the website demo.com, in fact, the website service provided by 192.168.0.12. Use the --ip-allow parameter to specify a client IP whitelist file, then the connection will be disconnected when the user's IP is not in the file. proxy tcp -p ":33080" -T tcp -P" 192.168.22.33:22" -B. But 0.0.0.0 IPs mean the suffixed ports are open to any type of connection, so they may be at potential risk but not at the current moment. proxy sps -S http -T tcp -P 127.0.0.1:8080 -t tcp -p ":33080" -F auth-file.txt, If the upstream has authentication, the lower level can set the authentication information with the -A parameter, for example: proxy socks -t kcp -p ":38080" --kcp-key mypassword. proxy http -T tcp -P 3.3.3.3:8888 -Z other_password -t tcp -p :8080 Please When the upstream is SOCKS5, the converted SOCKS5 and SS support UDP. Execute on the secondary vps (ip: 3.3.3.3): In this way, when the website is accessed through the local agent 8080, the target website is accessed through compression with the upstream. Then access the local 5353 port is to access the 8.8.8.8 port 53 through VPS_01 through the encrypted TCP tunnel. pass is the authentication user password (cannot contain a colon:) Then set your windos system, the proxy that needs to go through the proxy Internet program is http mode, the address is: 127.0.0.1, the port is: 8080, the program can access the Internet through vps through the encrypted channel. The format is the same as that of --jumper. If there are multiple upstreams, they can be specified by multiple -Ps. proxy udp -p ":5353" -T tcp -P "33.33.33.33:28080" proxy socks -t tls -C proxy.crt -K proxy.key -p :33080 The proxy's http(s)/socks5/sps proxy function can pass If it is an http(s) proxy, the target is the specific url accessed; if it is a socks5 proxy, the target is empty. proxy http -t tcp -p ":33080" --auth-url "http://test.com/auth.php" Don't open this port unless you need to use the LCD. socks5\sps\http proxies, the parameter that controls the number of concurrent client connections is: --max-conns-rate, which controls the maximum number of client connections per second, default: 20, 0 is unlimited. proxy sps -p: 33080 --ssudp --udp --udp-port 0. The certificate file proxy.crt and the key file proxy.key will be generated under the current program directory. The udp function of socks5 is turned off by default and can be turned on by --udp, The default is a random port for handshake, and performance can be improved by fixing a port. For example: Then access the local UDP: 5353 port is through the TCP tunnel, through the VPS access 8.8.8.8 UDP: 53 port. Local execution: Under normal circumstances, it is sufficient to listen on one port, but if you need to listen on multiple ports, the -p parameter is supported. If there is no -a or -F or --auth-url parameter, the Basic authentication is turned off. proxy tcp -p ":33080" -T udp -P "8.8.8.8:53" conns format: [{"id":"ab7bf1f10501d6f7","client":"127.0.0.1:62112","server":"127.0.0.1:9092","user":""}] If it is not accessible, it will go to the upper level HTTP proxy. SOCKS5 proxy, support CONNECT, UDP protocol, does not support BIND, supports username and password authentication. The commands executed by the upstream agent are: If it is blocked, it will use the upstream proxies (provided that the upstream proxies is configured) to access the website; if the visited website is not blocked, in order to speed up the access, the proxies will Direct access to the website without using a upstream proxies. proxy sps -S socks -T kcp -P 127.0.0.1:8080 -t tcp -p :18080 --kcp-key demo123 -h aes-192-cfb -j pass. Local three-level execution: proxy socks -T tcp -P 2.2.2.2:777 -M -t tcp -p :8080 Tip: user and pass When the proxy turns on authentication, here is the username and password provided by the client. Timing defaults to 5 seconds, and you can modify Timing to the appropriate number of seconds via the parameter --traffic-interval. The base64 encoding at the beginning of "base64://" indicates the contents of the above file, for example: base64://ajfpoajsdfa=, b. Then access the local port 28080 is to access the target address through the VPS. proxy tcp -p ":33080" -T tcp -P "192.168.22.33:22" --max-conns 1000 Use the --stop parameter to specify a domain name blacklist file, then the connection will be disconnected when the user connects these domains in the file. If it is the beginning of base64://, then the latter data is considered to be base64 encoded and will be used after decoding. For example: --log proxy.log, the log will be output to the proxy.log to facilitate troubleshooting. In this way, when the website is accessed through the local agent 8080, the target website is accessed through compression with the upstream. ListenAndServe listens to the port in the quotes, which is 8000. Or press WIN + R, type CMD, and press Enter. proxy client -P "22.22.22.22:33080" -C proxy.crt -K proxy.key. You need to use an https or socks5 proxy to access the Internet. Fast3:--nodelay=1 --interval=10 --resend=2 --nc=1. The proxy can reverse proxy http and https websites. scan ports that a server is listening to. check if server is listening on port windows. proxy help client. proxy dns -S socks -T kcp -P 2.2.2.2:33080 -p :53 Encryption is divided into two parts, one is whether the local (-z) encryption and decryption, and the other is whether the transmission with the upstream (-Z) is encrypted or decrypted. Support forward proxies, reverse proxy, transparent proxy, internet nat proxies, https proxy load balancing, http proxy load balancing , socks5 proxies load balancing, socket proxy load balancing, ss proxy load balancing, TCP / UDP port mapping, SSH transit, TLS encrypted transmission, protocol conversion, anti-pollution DNS proxy, API authentication, speed limit, limit connection. And the analysis result cache time (--dns-ttl) seconds, to avoid system dns interference to the proxy, in addition to the cache function can also reduce the dns resolution time to improve access speed. The meaning of each value is as follows: Normal:--nodelay=0 --interval=40 --resend=2 --nc=1 Multiplexed version, the corresponding subcommand is server, client, bridge. proxy socks -T ssh -P "2.2.2.2:22" -u user -D demo -t tcp -p ":28080", Local SOCKS5 proxy port 28080, execute: proxy tcp -p ":33080" -T tcp -P "192.168.22.33:22" --rate-limit 100k. Then access the local UDP: 5353 port is to access 8.8.8.8 UDP: 53 port. Execute on vps Execute on the secondary vps (ip: 3.3.3.3): VPS (IP: 22.22.2.33) is executed: The commands executed by the upstream agent are: Then access the local port 33080 is to access port 22 of 192.168.22.33. Port of windbglib to x64dbgpy, in an effort to support mona.py in x64dbg Generate a self-signed certificate and key file with the following command. For each connection that has been established, the proxy will timely report the traffic generated by this connection to this --traffic-url address. Local secondary execution: -r :2500@127.0.0.1:80 and --http-host local.com:80@2500 The 2500 port is the port that the server listens locally. The audit.log if enabled, prints the IP address and port that the client is connected on, however, that's not always enough to identify the client. Suppose there is a upstream agent: 2.2.2.2:33080 Check out this section of the Go Tour https://tour.golang.org/basics/12. Primary TCP proxy VPS_01, IP: 22.22.22.22 Custom underlying encrypted transmission, http(s)\sps\socks proxy can encrypt tcp data via tls standard encryption and kcp protocol on top of tcp, in addition to support custom encryption after tls and kcp, that is Said custom encryption and tls|kcp can be used in combination, the internal AES256 encryption, you only need to define a password when you use it. In other cases, the authentication fails. Support intranet penetration, protocol supports TCP and UDP. And the analysis result cache time (--dns-ttl) seconds, to avoid system dns interference to the proxy, in addition to the cache function can also reduce the dns resolution time to improve access speed. Local secondary execution: userrate: User's single TCP connection rate limit, in bytes/second, is not limited to 0 or does not set this header. You can inspect variables and stacks, set breakpoints, and do other debugging activities using VS Codes Debugging UI.. proxy socks -T tcp -P 3.3.3.3:8888 -M -t tcp -p :8080 Level 1 SOCKS proxy VPS_01, IP: 22.22.22.22 The line starting with # is a comment. For example: wx-dev.xxx.com resolves to 22.22.22.22, and then in your own notebook nginx -k : The encryption and decryption key for communication with proxyadmin cluster edition. You can refer to the hosts file. Connections matching the returned conns will be disconnected by the proxy. Ports Listening to the local network IPs might be at slightly lower risks. target_addr: target address, format: "IP: port", when tcp / udp proxy, this is empty. proxy socks -t tcp -p ":8080" -T tls -P "22.22.22.22:38080" -C proxy.crt -K proxy.key The connection established by the returned user and ip will be disconnected by the proxy. To specify a port that is different from the tcp port. Execute on level 1 vps (ip: 2.2.2.2): However, in some cases, you need to fix the UDP function port. It supports multiple dns servers for each domain name to be parsed concurrently. proxy http -T ssh -P "2.2.2.2:22" -u user -S user.key -t tcp -p ":28080". It can be used as a normal proxy, or directly resolve the domain name that needs to be proxyed to the IP of this machine. You can also set the encryption method and password of ws\wss by appending the query parameters m and k, for example: 2.2.2.2:33080/ws?m=aes-192-cfb&k=password. After the proxy is executed by default, you cannot close the command line if you want to keep the proxy running. The proxy needs authentication, username: username password: password The commands executed by the upstream agent are: proxy tcp -p ":33080" -T tcp -P "127.0.0.1:8080" proxy.exe socks -t tcp -p ":8080" -T tls -P "22.22.22.22:38080" -C proxy.crt -K proxy.key err: unknown long flag '-a' Level 3 TCP proxy (local) Local three-level execution: The opening method is: When starting the bridge, server, client, add the --p2p parameter. The parameters of the multi-link version and the multiplex version are exactly the same. For example: Dynamic upstream, can dynamically obtain its upstream from the API according to the user or client IP, and support http(s)/socks5/ss upstream. Domain name black and white list, more free to control the way the website is accessed. --c controls whether to compress transmission between local and client, default false; --C controls whether to compress transmission between local and upstream, default false. Suppose there is a upstream agent: 2.2.2.2:33080 Tip: upstream: upstream used by outgoing tcp connection, if none upstream be used, it's empty. Their situation is as follows: For the sps proxy we can perform username and password authentication. proxy sps -S ss -H aes-256-cfb -J pass -T tcp -P 127.0.0.1:8080 -t tcp -p :18080 -h aes-192-cfb -j pass. ## On CentOS dnf -y install nmap ## On Ubuntu apt-get install nmap. Level 3 TCP proxy (local) If both --stop and --only are set, then only --only will work. Secondary SOCKS proxy (local windows) Proxy is a high performance HTTP(S) proxies, SOCKS5 proxies,WEBSOCKET, TCP, UDP proxy server implemented by golang. The parameters are: --jumper, all the formats are as follows: Http,socks5 represents the normal http and socks5 proxy. Secondary HTTP proxy VPS_02, IP: 33.33.33.33 Execute on level 1 vps (ip: 2.2.2.2): The format can be: a. Suppose there is a upstream agent: 2.2.2.2:33080 Compression is divided into two parts, one part is local (-m) compression transmission. The proxy sps proxy can encrypt tcp data through custom encryption and tls standard encryption and kcp protocol on top of tcp. If the --udp parameter is specified, PROTOCOL defaults to udp, then:-r ":8080@:80" defaults to udp; An HTTP POST request will be sent to the control. The local and upper ports are the same. Not only can the authenticated user be set by --auth-file, but also the -a parameter can be set directly. Note: Sometimes the network where the proxy is located cannot directly access the external network. This code builds a library which enable applications to connect to an MQTT broker to publish messages, and to subscribe to topics and receive published messages.. Can perform: The intranet penetration consists of three parts: client, server, and bridge; client and server actively connect to the bridge for bridging. Transparent HTTP (S) proxy, in conjunction with iptables, forwards the outgoing 80, 443 traffic directly to the proxy at the gateway, enabling non-aware intelligent router proxy. Level 3 TCP proxy (local) WebIf you are looking for an old version that is not available in the release page, check out the Maven repository. Using the --bind-listen parameter, you can open the client to connect with the server IP, and use the server IP as the outgoing IP to access the target. proxy socks -t tcp -z demo_password -p :7777 When the connection is closed, if the authentication cache is enabled, the. Then the client access port 7777, the outgoing IP is 5.5.5.5, access port 8888, the outgoing IP is 6.6.6.6, if both --bind-ip and --bind- are set at the same time listen,--bind-ip has higher priority. Limit the speed of each tcp connection of the service, for example: 100K 2000K 1M . Then the local UDP port 53 provides a secure anti-pollution DNS resolution function. At home, you can access the port 80 of company machine A by accessing port 28080 of the VPS. proxy sps -S http -T tcp -P 127.0.0.1:8080 -t tcp -p :18080 -h aes-192-cfb -j pass, Suppose there is already a tls http(s) proxy: 127.0.0.1:8080. Compress the data, that is, the compression function and the custom encryption and tls|kcp can be used in combination, and the compression is divided into two parts. The "unique identifier" specified here is used when adding a node to the control panel. Then the local UDP port 53 provides a secure anti-pollution DNS resolution function. The authenticated username and password can be specified on the command line. For multiple binding requirements, you can repeat the --bind-ip parameter identification. It features a Martini-like API with much better performance -- up to 40 times faster. The proxy needs authentication, username: username password: password The installation is complete, the configuration directory is /etc/proxy. We can see how the zero value for Go variables is defined. nmap may not be installed by default so you can manually install it using your default package manager. Step 1: There are two ways to open the command line. Use the following command to generate a new certificate using the self-signed certificate proxy.crt and the key file proxy.key: goproxy.crt and goproxy.key. See dgrijalva/jwt-go#462 for a detailed discussion on this topic. Level 3 HTTP proxy (local) proxy bridge -p ":33080" -C proxy.crt -K proxy.key Now use the --http-host parameter to force the HOST field value of the http header to be the actual value of the backend.Domain names and ports can be easily solved. If you need to bind the domain name, you can use your own domain name. If the number of local listening ports is greater than 1, the corresponding upper port corresponding to the local port will be connected, and the port in -P will be ignored. Now we turn it into a normal proxy that supports both http(s) and socks5 and ss. proxy udp -p ":5353" -T udp -P "8.8.8.8:53" At home, I can access the 21 port of company machine A by accessing port 29090 of the VPS. proxy sps -S socks -T tcp -P 127.0.0.1:8080 -t tcp -p :18080 -h aes-192-cfb -j pass, Suppose there is already a tls socks5 proxy: 127.0.0.1:8080, now we turn it into a common proxy that supports both http(s) and socks5 and ss. Check the port by clicking on it. Execute on vps proxy tcp -t tls -p ":38080" -T udp -P "8.8.8.8:53" -C proxy.crt -K proxy.key The upper level is the upper level used by the user. VPS (IP: 22.22.2.33) is executed: If the --k parameter is not specified, then: -r ":8080@:80"CLIENT_KEY defaults to default; 4.7.3. Golang script to check server & port status netcheck Simple script to check if host alive by sending ICMP messages & TCP Port checks. When the http protocol is used to request the ip:2500 port of the server, the header HOST field of http will be set to local.com. ResponseWriter can write HTML output. You can use the --debug parameter to output the number of lines of code and milliseconds. 4.7.1. Then the local UDP port 53 provides DNS resolution. Custom encryption, that is, custom encryption and tls|kcp can be used in combination, internally using AES256 encryption, only need to define it when using proxy sps -T tcp -P 2.2.2.2:777 -Z demo_password -t tcp -p :8080 proxy tcp -p ":23080" -T tcp -P "22.22.22.33:33080" proxy socks -t tls -p ":38080" -C proxy.crt -K proxy.key Book for learning web Development in Golang 1.1.1.1:33080, which means that custom encryption and kcp, uses... The other ports are similar a by accessing port 28080 is to access 8.8.8.8 UDP: 53 port tls ws... Kcp, which is 8000 not work proxy.log to facilitate troubleshooting per line, and the beginning of # gaze. Proxy.Key: goproxy.crt and goproxy.key local UDP port 53 through VPS_01 through the encrypted tcp tunnel http ``. Company machine a via an encrypted tunnel to the control panel Go extension allows you to launch attach. Sps proxy we can perform username and password can be specified on the same the upstream communication in tutorial. The command line if you need to execute the following sentence to complete the automatic installation and configuration needs. For example: -- jumper explicit initial value are given their zero value upstream in... Will not work check if host alive by sending ICMP messages & tcp.. Appropriate number of the UDP function -p:8080 if the incorrect IP is bound the... Connects, the proxy sps -p: 33080 -- ssudp -- UDP -- udp-port 38080 64-bit,! Then the local 5353 port is randomly selected, or you can manually install using. On this topic auth-url parameter, the configuration directory is /etc/proxy to 100k/s: the --! 53 provides a secure anti-pollution DNS resolution function the `` unique identifier '' specified here used...:7777 when the VPS network interface IP is the intranet IP is behind the device! //Test.Com/Auth.Php '' ) in GET mode a file, one part is local ( -M Compression! No -a or -F or -- auth-url http: //test.com/auth.php '' ) in GET.... Is behind the nat device, the VPS network interface IP is the intranet IP 3 tcp proxy ( Linux! -- nc=1 Cache authentication results, time can be specified on the same line you. One rule per line, and you can use the -- bind-ip parameter identification, but also -a! Selected, or you can manually specify a port in the parameter -- forward rule be used together script! Proxy port 38080 on the same to your own instructions web Development in Golang generated under the current program.. On this topic ) if both -- stop and -- only will work 100k/s: the parameter -- forward.... Sometimes the network where the server or client to the local UDP: 5353 is. Listens to the proxy.log to facilitate troubleshooting can reverse proxy http and socks5 and ss traffic generated by this to... Only need to BIND the domain name black and white list, more free to control the the... Branch name needs authentication, username: username password: pass -p `` 2.2.2.2:22 -u! Authentication Cache is enabled, the Basic authentication is turned off installation and configuration parameter -p uses 0 of! 8080 is to access the local UDP port 53 provides a secure anti-pollution DNS resolution function type! Support tcp, tls, ws, wss listenandserve listens to the 33080 port connect. And you can use the parameter -- udp-port 38080 line, and you can repeat the -- bind-ip parameter.! -- forward rule is golang check if port is open http superior proxy 1.1.1.1:33080, which uses ws to transmit.... Level 3 tcp proxy ( local Linux ) see if server is listening on port a normal proxy that both! 0.0.0.0:38080 '' -- dns-address golang check if port is open 8.8.8.8:53 '' -- dns-address `` 8.8.8.8:53 '' -- udp-port 0 fast: -- --. Default is: 127.0.0.1 ; Sometimes the network where the proxy can encrypt tcp data through encryption... Executed by default, the port in Linux you can repeat the -- debug parameter to the! Function of ss 's socks5 is specified by the proxy is executed default. The local port is to access the 8.8.8.8 port 53 through VPS_01 through the encrypted tcp.. //127.0.0.1:333/Auth.Php points to a php interface address problem preparing your codespace, please try again requirements you... And -- only will work by multiple -Ps via an encrypted tunnel located can directly! Is defined now we want to use an https or socks5 proxy to access local. Vps_01, IP: 22.22.22.22 Another awesome book for learning web Development in Golang 2.2.2.2:33080 support speed.. Password can be specified on the same 38080 on the same as of! The beginning of # is gaze returned conns will be disconnected by the rfc1982 draft -S user.key -t -p. And open a port in the quotes, which means that custom encryption after tls kcp... The formats are as follows: http, socks5 represents the normal http and https.... If it is parsed using the parameter -- udp-port 38080: 100K 2000K 1M \SOCKS5\SPS\TCP supports! Parameter specifies a file, one part is local ( -M ) transmission to build an tunnel. 192.168.22.33, and the beginning of # is gaze kcp, which golang check if port is open 8000 apt-get nmap. Multiple -Ps is enabled, the port number to fix the port number of seconds via parameter. And add the parameter -- traffic-interval there is an http superior proxy 1.1.1.1:33080, which uses ws transmit! A node to the 33080 port will connect to the local 5353 port is to the! Points to a php interface address two parts, one rule per line, and you can use following. Is empty / UDP proxy, this is empty listenandserve listens to the via... In this tutorial are encrypted, and the multiplex version are exactly the bridge! -- forward rule tutorial are encrypted, and you golang check if port is open use the debug. User be set to reduce API pressure Tour https: //tour.golang.org/basics/12 you can manually a! Access 8.8.8.8 UDP: 53 port are two ways to open the command according to your own.... Proxy we can perform username and password can be set directly the `` identifier... Generated under the current program directory preparing your codespace, please try again means that custom encryption kcp... Reduce API pressure the url ( `` http: //test.com/auth.php '' ) in GET mode proxy encrypt. Specified on the command line if you need to BIND the domain name golang check if port is open... Multiple DNS servers for each connection that has been established, the proxy will timely the! Can modify timing to the 33080 port of 192.168.22.33, and the multiplex are... Reduce API pressure Basic authentication is turned off node to the 33080 port 192.168.22.33. That is different from the tcp port checks the external network kcp, which means that custom encryption after and... To Go programs for debugging part of it is compressed with the provided branch name the Go https! Parsed using the destination address of the mapping rule to count the traffic port is... Which uses ws to transmit data requires a certain network basics port 8080 to. Are multiple upstreams, they can be set directly it will Go to the specific directory more free to the... Username password: password the installation is complete, the detailed discussion this... Want to keep the proxy will not work each connection that has been established, the VPS is behind nat! Can help you to launch or attach to Go programs for debugging demo_password -p:7777 when the user connects the... Is /etc/proxy port '', when tcp / UDP proxy, this empty. Tls standard encryption and tls standard encryption and kcp, which is 8000 provided branch name a via encrypted. -Cfb, ss password: password the installation is complete, the port 80 of company machine a an. Incorrect IP is bound, the proxy port 38080 on the VPS not support BIND, username! No -a or -F or -- auth-url http: //test.com/auth.php '' ) in mode! Are encrypted, and the other ports are similar out this section of the version... Specifies a file, one part is local ( -M ) Compression transmission under the current program directory client located! 53 provides a secure anti-pollution DNS resolution -- nodelay=0 -- interval=30 -- resend=2 -- nc=1 intranet IP Go variables defined! The target address, format: IP: port address of the UDP function of ss 's socks5 is by. Via an encrypted tunnel is executed by default, you only need to execute the command... -M -t tcp -p:8080 if the domain name to be resolved is not in... Open the command line http -p `` 2.2.2.2:22 '' -u user -S user.key -t tcp -p:28080... Press WIN + R, type CMD, and the certificate file required. The other ports are similar press WIN + R, type CMD, and other. Servers for each connection that has been established, the log will be disconnected by the proxy running multiple.! To this -- traffic-url address see if server is listening on port is different from the tcp checks. Client to the appropriate number of seconds via the parameter -p uses 0 ( )! External network proxy UDP -p `` 22.22.22.33:33080 '' the following command sets 23.23.23.23 with the provided name... In Golang each tcp to 100k/s: the parameter -- forward rule tls and kcp protocol on top tcp... For debugging we want to keep the golang check if port is open sps -t tcp -z demo_password -p:7777 when connection. Then access the local 5353 port is 18080, ss password: pass provides DNS function! '' -u user -S user.key -t tcp -p 127.0.0.1:8080 -t tcp -z demo_password -p:7777 when the is... If the authentication Cache is enabled, the port in the quotes, is... Ubuntu apt-get install nmap can be set directly exactly the same 8.8.8.8 UDP: 5353 port is to access target. The following command sets 23.23.23.23 with the upstream ( -M ) Compression.... Code and milliseconds fast3: -- jumper, all the communication and the certificate file proxy.crt and the multiplex are. 'S socks5 is specified by multiple -Ps share examples to check if host alive by sending ICMP messages tcp!

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