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Old 07-13-2009, 01:48 AM   #1
Registered: Apr 2009
Location: Bengaluru, India
Distribution: RHEL 5.4, 6.0, Ubuntu 10.04
Posts: 704

Rep: Reputation: 55
ports are not visible in /etc/sysconfig/iptables file

hi all

$ nmap localhost

Starting Nmap 4.53 ( ) at 2009-07-14 11:07 IST
Interesting ports on localhost.localdomain (
Not shown: 1705 closed ports
21/tcp open ftp
22/tcp open ssh
111/tcp open rpcbind
631/tcp open ipp
883/tcp open unknown
938/tcp open unknown
980/tcp open unknown
2049/tcp open nfs
5900/tcp open vnc

is the output.. i am not able to see the ports 883,938 or 980 in the file
/etc/sysconfig/iptables..How to close these ports...

why is this so.........

Thanks in advance...............
Old 07-13-2009, 02:05 AM   #2
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Registered: Dec 2003
Location: phnom penh
Distribution: Fedora
Posts: 1,625

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Hi, vinaytp. You should probably take a closer look at things. nmap localhost shows all ports open on the loopback interface ( Those are generally safe -- unless you don't trust your own processes. The ones you have to worry about are ports open to the outside. You can find those by running nmap (subsitute the ip address(es) of your interfaces) or netstat -tuln. If you run netstat, pay attention to the address on which the port is open.


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