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Top Forums Shell Programming and Scripting shell script to print particular column into text file Post 302471728 by anand121 on Monday 15th of November 2010 12:18:50 AM
Old 11-15-2010
closing open ports using scripts

hi rainboisterous, will u explain ur script a bit
here ,
for i in `comm -23 1.txt 2.txt`
here 1.txt contains all open ports on system by doing nmap
and 2.txt contains all allowed ports .
for e.g 1.txt might contain
7/tcp
13/tcp
22/tcp
23/tcp
37/tcp
and 2.txt contains
22/tcp
23/tcp
so ur script will commpare both text file and drop all ports apart from 23/tcp . please explain
 

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tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME
tcp-env - set up TCP-related environment variables SYNOPSIS
tcp-env [ -rR ] [ -ttimeout ] program [ arg ... ] DESCRIPTION
The input for tcp-env must be a TCP connection. tcp-env finds out information about that connection, puts the information into several environment variables as described in tcp-environ(5), and runs program with the given arguments. Usually tcp-env is run from inetd. It might instead be run from another server that already sets up the right environment variables; if PROTO is set to TCP when tcp-env is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check whether the input is a TCP connection. OPTIONS
-r (Default.) Attempt to obtain TCPREMOTEINFO from the remote host. -R Do not attempt to obtain TCPREMOTEINFO from the remote host. -ttimeout Give up on the TCPREMOTEINFO connection attempt after timeout seconds. Default: 30. SEE ALSO
tcp-environ(5), inetd(8) tcp-env(1)
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