Comments on: Linux / UNIX: Scanning network for open ports with nmap command http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html This is a Linux sys admin journal by Vivek about sys admin work, Linux tips & tricks, hacks, news and more. Fri, 10 Feb 2012 20:37:43 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Rajeshhttp://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-156714 Rajesh Sat, 19 Jun 2010 05:48:35 +0000 http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-156714 nmap -v -sT localhost ---------gives the following output for me Discovered open port 22/tcp on 127.0.0.1 Discovered open port 53/tcp on 127.0.0.1 Discovered open port 25/tcp on 127.0.0.1 Discovered open port 443/tcp on 127.0.0.1 Discovered open port 111/tcp on 127.0.0.1 Discovered open port 8080/tcp on 127.0.0.1 Discovered open port 80/tcp on 127.0.0.1 Discovered open port 3128/tcp on 127.0.0.1 PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 53/tcp open domain 80/tcp open http 111/tcp open rpcbind 443/tcp open https 3128/tcp open squid-http 8080/tcp open http-proxy I am not able to get gmail or yahoo mail to dhcp client. But I am able to get for clients with fixed ip... Where I am wrong ? I tried with Centos 5 and Fedora 13. using squid Transparent proxy and dansguardian.... Any help is appreciated... Thanks.. nmap -v -sT localhost ———gives the following output for me

Discovered open port 22/tcp on 127.0.0.1
Discovered open port 53/tcp on 127.0.0.1
Discovered open port 25/tcp on 127.0.0.1
Discovered open port 443/tcp on 127.0.0.1
Discovered open port 111/tcp on 127.0.0.1
Discovered open port 8080/tcp on 127.0.0.1
Discovered open port 80/tcp on 127.0.0.1
Discovered open port 3128/tcp on 127.0.0.1

PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
53/tcp open domain
80/tcp open http
111/tcp open rpcbind
443/tcp open https
3128/tcp open squid-http
8080/tcp open http-proxy

I am not able to get gmail or yahoo mail to dhcp client. But I am able to get for clients with fixed ip…

Where I am wrong ?

I tried with Centos 5 and Fedora 13.
using squid Transparent proxy and dansguardian….

Any help is appreciated…

Thanks..

]]> By: mohammed saudhttp://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-154674 mohammed saud Thu, 01 Apr 2010 15:10:33 +0000 http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-154674 Peace be upon you I've got a problem in the net I'm Cat, a call from two to your web server does not work and if approached from the server to the device working I use 12 and Fedora before opened in Port modem did not work I would like you to help me in that not very much In Fedora 12 ncat -v -l -p 62323 and ncat -v -l -p 111 and from 1 to 4444 open port dosn't work please help me Peace be upon you
I’ve got a problem in the net I’m Cat, a call from two to your web server does not work and if approached from the server to the device working I use 12 and Fedora before opened in Port modem did not work I would like you to help me in that not very much
In Fedora 12
ncat -v -l -p 62323
and
ncat -v -l -p 111
and from 1 to 4444
open port dosn’t work
please help me

]]> By: svhttp://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-150481 sv Thu, 03 Sep 2009 01:55:31 +0000 http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-150481 Very useful command to monitor network, Thanks a lot. Very useful command to monitor network, Thanks a lot.

]]> By: ammarohttp://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-143807 ammaro Sun, 18 May 2008 06:18:53 +0000 http://www.cyberciti.biz/tips/linux-scanning-network-for-open-ports.html#comment-143807 thx for useful command thx for useful command

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