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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LEARN ABOUT CENTOS
tcp-env
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)