Linux Network Commands: Difference between revisions
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#REDIRECT [[Linux Commands]] |
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;[http://www.dest-unreach.org/socat/doc/socat.html socat] |
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:command-line utility that establishes two bidirectional byte streams and transfers data between them ([http://wiki.yobi.be/wiki/Bypass_Proxy#Client_side:_using_socat]). |
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:''socat'' is the more powerful version of ''netcat''. |
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<source lang="bash">socat -ly 'TCP4-LISTEN:143,reuseaddr,fork' PROXY:ton.imap.server:143|TCP:134.27.168.36:8080 |
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ProxyCommand socat - 'PROXY:%h:%p,proxyauth=user:pass|SSL,verify=0|PROXY:my.server:443,proxyauth=user:pass|TCP:big.brother.proxy:8080' #Using v2.0.0 beta |
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</source> |
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:''socat'' can be easily used as a replacement of ''telnet'': |
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<source lang="bash">socat tcp:<host>:<port> - #<port> can be a port number or service name (telnet,imap...)</source> |
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;[http://netcat.sourceforge.net/ netcat] |
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:TCP-IP swiss army knife |
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:''(equivalent of the telnet program. Check [[wikipedia:netcat]]. Also known as command '''nc''')''. |
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;[http://en.wikipedia.org/wiki/Netstat netstat] |
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: Print network connections, routing tables, interface statistics, masqurade connections, and multicast memberships |
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<source lang="bash"> |
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netstat -atpn #All, tcp, socket program PID, numeric |
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netstat -rn #Kernel route table, numberic |
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</source> |
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When listing sockets (default output), you'll get an output like: |
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{| |
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|- |
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% netstat -at |
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Active Internet connections (servers and established) |
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Proto Recv-Q Send-Q Local Address Foreign Address State |
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tcp 0 0 *:time *:* LISTEN |
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tcp 0 0 localhost:mysql *:* LISTEN |
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tcp 0 0 andLinux.local:43449 windows-host:x11 ESTABLISHED |
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% netstat -atn |
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Active Internet connections (servers and established) |
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Proto Recv-Q Send-Q Local Address Foreign Address State |
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tcp 0 0 0.0.0.0:37 0.0.0.0:* LISTEN |
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tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN |
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tcp 0 0 192.168.11.150:43449 192.168.11.1:6000 ESTABLISHED |
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|} |
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:;Local Address |
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::'''*''' or '''0.0.0.0''' means that the process accepts connection from any interface. |
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::'''127.0.0.1''' means it only accepts connection on localhost loopback (and so only connection that originates from local PC as well). |
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::Any other IP address means that the process listen on the given port at the given IP address |
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Latest revision as of 10:19, 5 November 2008
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