Comments on: Redhat / CentOS / Fedora Linux Open Port

By: ketan

ketan — Thu, 09 Feb 2012 21:04:05 +0000

Helped me too. Thanks

By: Moiz Kiyani

Moiz Kiyani — Wed, 08 Feb 2012 10:05:39 +0000

MOVING the REJECTs to end of file or Above COMMIT Worked for me.

By: srqwebguy

srqwebguy — Wed, 28 Dec 2011 15:12:37 +0000

Terrific info. Very helpful. Thanks.

By: Owais Akhlaq

Owais Akhlaq — Wed, 12 Oct 2011 08:35:19 +0000

Dear All,

I have installed a sever with CentOS 6.0 and then installed mySQL and PHP in it. Then i installed CPanel in it. After rebooting the system, my Login screen is disabled and i can only login via Putty software on port 22 , and can only see a console screen.
My question is:
How can i gain access to my cpanel ? i read in articles that cpanel is accessed via 2082 and 2083 ports. But both are seemed to be blocked.

Thanks in advance. Please help

By: farrukh

farrukh — Thu, 06 Oct 2011 15:25:28 +0000

hi, thanks a bunch for an informative article. you literally saved my day today.
thanks again.

By: Kyle Durelle

Kyle Durelle — Fri, 16 Sep 2011 14:35:04 +0000

sorry for the triple post after much googling and router configurations i figured it out

By: Kyle Durelle

Kyle Durelle — Fri, 16 Sep 2011 14:02:26 +0000

There was a TYPO my bad but i still cant get port 80 to listen.

iptables: Flushing firewall rules: [ OK ]
iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
[root@ sysconfig]# telnet localhost 80
Trying ::1…
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1…

By: Kyle Durelle

Kyle Durelle — Fri, 16 Sep 2011 14:00:42 +0000

Can somebody help me? im trying these methods and they dont work

iptables: Setting chains to policy ACCEPT: filter [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: iptables-restore: line 10 failed
[FAILED]
[root@ sysconfig]# nano iptables

and this is what i have in the file

# Generated by iptables-save v1.4.7 on Fri Sep 16 10:50:02 2011
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [13:1276]
-A INPUT -m state –state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state –state NEW -m tcp –dport 22 -j ACCEPT
-A INOUT -p tcp -m state –state NEW -m tcp –dport 80 -j ACCEPT
-A INPUT -j REJECT –reject-with icmp-host-prohibited
-A FORWARD -j REJECT –reject-with icmp-host-prohibited
COMMIT
# Completed on Fri Sep 16 10:50:02 2011

By: Pao

Pao — Tue, 13 Sep 2011 01:47:34 +0000

Thanks Vivek!

By: Renee Gailey

Renee Gailey — Mon, 18 Jul 2011 07:23:53 +0000

I edited my /etc/sysconfig/iptables file. adding in the ports I needed to open. I successfully saved and closed the file, verifying the ports were added to file by viewing the iptables file. I then went to restart it with commands listed above. I kept getting command not found. The first line of the file reads: # Firewall configuration written by system-config-securitylevel
I am running RH Linux 2.6.18-53.el5. How do I stop and start the iptables process so the additional ports will take effect?

By: wupload

wupload — Sun, 17 Jul 2011 09:14:10 +0000

thnx man work fine

By: Deb Biswas

Deb Biswas — Thu, 14 Jul 2011 20:13:47 +0000

This information was very useful/handy to me today (2011-07-14) , 5 years after you wrote this article (SEPTEMBER 13, 2007) ! Thank you so much VIVEK GITE. Please keep posing such useful stuff. Regards.

By: Edson

Edson — Thu, 07 Jul 2011 09:50:20 +0000

someone from outside my network is failing to access my linux server via SSH but i can access it using Putty from within my network. Nothing has changed on my router and there is no firewall in place to block the SSH connection, how can i allow that connection, the guy can ping the server and access other ports.

By: Kunal sagar

Kunal sagar — Tue, 28 Jun 2011 05:07:00 +0000

Thanks this one worked for me too

By: zahir

zahir — Thu, 05 May 2011 12:13:03 +0000

/etc/sysconfig/iptables-config: line 42: -A: command not found
/etc/sysconfig/iptables-config: line 43: -A: command not found

I am getting this error ????

By: chella

chella — Tue, 19 Apr 2011 20:14:15 +0000

Thanks a lot Vivek.

By: Swati

Swati — Tue, 05 Apr 2011 07:28:25 +0000

i need to access java web service which is running on Apache in linux at port 8080 from windows.

By: Nuno

Nuno — Thu, 17 Feb 2011 15:55:46 +0000

LOL, if you can’t even navigate in a *nix environment why do you even bother with iptables?

nevertheless you can do the following:

1-insert rules you want
2- press Esc
3- press :
4- wq
5- Enter

By: Sam

Sam — Wed, 02 Feb 2011 04:05:32 +0000

Hi iam totally a newbie to Linux, in my office i am assigned to this task which is install redhat enterprise server 5 and open up the ports 21,22 and 23 to someone else to access the box, he also needs to export the display to his machine as well, as this sounds “GREEK” to me, i need help from you guys to get this completed. pls tell me step by step what should i do?

By: Anthony

Anthony — Tue, 25 Jan 2011 05:45:20 +0000

I am Trying To Install Camfrog Server ( Linux Version ) On My Linus CentOS I can Wget And Install The App But Is Stuck After This Point Does Anyone KNow How to Install This App?