Using WHM/Cpanel How Do I Open Up A Port

Mar 4, 2007

I am managing a server and just learning how to do everything. It is a linux server running WHM/Cpanel. I need web scripts on this server to be able to connect to external SMTP servers. Therefore I need to open up port 25 (if it is not already).

How do I open ports on my server? Hopefully by using WHM/Cpanel (I am not too familiar with using the command line).

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Open A Port

Jan 5, 2009

i have a linux machine with centos5 64 bit. I have a firewall and would like to know how to open and close ports? I have tried several different things and cant seem to open a port?

Is there a command line i can use in ssh to open a port? Or is there something i can addon to cpanel to control ports?

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I tried running netsta- an in cmd prompt

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Oct 18, 2009

I got a msg from the server that a port 444 is open in my server, how could i know what the bindshell ports open in my server and how to close it please ?

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i use cpanel/csf firewall

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Jul 18, 2007

I have a VPS running CentOS 4.4 which I have just been securing. It is running apache on port 80, BIND on port 53 and ssh on an atypical port. However, when I do a portscan with nmap I find that port 5190/tcp is open. There is no daemon listening on the port (I think it is for AIM?) and in any case iptables should refuse any connection on this port. Should I worry about this or is the port pretty safe to leave open?

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Feb 21, 2007

How do I check whether certain ports (like 25, 53, etc.) are open on my server or not ?

If it is not open how do I open the port ?

It is a CentOS server with no Control Panel

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Jun 13, 2007

Due to some circumstances out of my control, I've had to move from postfix to qmail. In postfix, I simply edited and added a new line to open it up on port 26 and 25 at the same time. In qmail it's not that easy. I followed the instructions at and it worked, but it takes about 15 seconds for thunderbird send the mail (it sits there saying 'connected to

Is there a better way of opening qmail on 26 or forwarding requests for 26 to 25?

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Jun 29, 2009

I want to check if certain port is open and not blocked by my ISP how can I do that?

let's say I want to check if PPTP VPN port is open what software show me these info

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Dec 21, 2008

I install and configure apf firewall on my VPS and i have a problem. The port 80 is open, my website it`s up and working but i can`t download anything.

[root@HERA ~]# wget ***/
--02:03:49-- ***/
Resolving ***...
Connecting to ***||:80...

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Feb 19, 2008

How can I open port 3000 on my linux server.

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Pure-ftp :: 425 Could Not Open Data Connection To Port 2535: Connection Timed Out

Apr 7, 2008

I have ftp server (pure-ftp). with firewall.

i allowed 20 and 21 port in "CSF" firewall

now when i or our client connect to the server connection done.

and the they fire dir or ls command they will receive error

"425 Could not open data connection to port 2535: Connection timed out"

what is the problem.i have already allowed passive port 2500:3500 then why i received this types of error

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How Do I Disable Open Relay In Cpanel

Jul 15, 2009

How Do I disable Open Relay in cpanel?

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Mar 11, 2008

Our new data center provided us with a Cisco ASA5510 firewall. We're setting up all new servers and will begin migrating all of our domains from our current co-lo to the new place.

At the old co-lo, they provided us a very basic BSD based router, and our servers all had external public facing IPs on them. Firewalling was handled at the server (Windows Firewall or Linux IPtables).

The new place is NAT'ing us, so our servers all have a 192.168.10.x address inside, and they map the external address for us through to the inside.

By default, they are locking everything down. I had to ask them to open ssh so I could remote into my CentOS box last night.

I'm not a network guru-- what ports are going to NEED to be opened so I can give them a list? This is a standard PLESK hosting server so http (80), https, ssh, ftp, pop3, smtp, what else? Anyone have a list?

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Jan 25, 2014

I have a server installed with tomat . When I call a page I am getting the output as text code.

The port is listening
netstat -tnpl | grep 8080
tcp 0 0 :::8080 :::* LISTEN 11604/java

Getting the following error while adding servlets

]# /usr/local/cpanel/scripts/addservlets2
Scanning httpd.conf....................................................................................................
warn [gentomcatlist2] safeunlock: Invalid arguments
Could not open '/var/run/': No such file or directory
Could not open '/var/run/': No such file or directory
Could not chdir into /usr/local/jakarta/tomcat/bin: No such file or directory
Done: .jsp support installed for

But still the page is showing as text code

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Jul 14, 2008

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Dec 14, 2008

Message not sent. Server replied: Connection timed out 110 Can't open SMTP stream.

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Apr 29, 2014

I installed a brand new cpanel server, and with the first hosting/domain I've installed i'm facing a problem the dns refuse to respond: so the website doesn't open to the browser

Default Server:

> server *************
Default Server: *********************
Address: *******************

> domain.tld
Server: *****************
Address: **************************

*** iris.server.tld can't find domain.tld: Query refused

in the log file I see:

Apr 29 11:30:57 iris named[760102]: client ****************#26272: query 'domain.tld/NS/IN' denied

I've tried restarting bind and rebuilding the dns tables.

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When telneting from outside to the public IP address of a cPanel box, i can send email to any email address without being prompted to authenticate.

is this an open relay?

I thought that email should only be accepted inbound. In addition, we have clients that complain about receiving a high number of backscatters which looks to a certain degree like a related issue.

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May 4, 2015

I can't seem to get crons to work, no errors or anything. I read to try run the cron directly in SSH and can't this.


Warning: realpath(): open_basedir restriction in effect. File(/home/*/public_html) is not within the allowed path(s): (0) in /home/*/public_html/cogmin/../init.php on line 0
Warning: file_exists(): open_basedir restriction in effect. File(/includes/classes/WHMCS/Init.php) is not within the allowed path(s): (0) in /home/*/public_html/cogmin/../init.php on line 0
<div style="border: 1px dashed #cc0000;font-family:Tahoma;background-color:#FBEEEB;width:100%;padding:10px;color:#cc0000;"><strong>Down for Maintenance</strong><br>One or more required files are missing. If an install or upgrade is not currently in progress, please contact the system administrator.</div>

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CPanel E-mail :: Disable SMTP Authentication And Not Allow Open Relay

Apr 1, 2014

Is there a way to disable SMTP Authentication? By that I don't mean create an open relay, I mean just stop attempts to authenticate via SMTP but still allow incoming email on port 25.

The server is dedicated and for one business only. Mails are sent out from the hosted websites but there should be no inbound emails. Mail accounts on the domains are hosted elsewhere. Ideally we'd block inbound on port 25 completely but our hosting provider requires us to send mail via their relay servers so we have to allow it to deal with any NDRs from their relay cluster. They have an intermittent spam issue so are frequently changing IPs of the relay servers, meaning we can't maintain an accepted list of IPs for inbound mail on port 25.

We have the CSF firewall and it blocks repeated failed attempts to authenticate, but this results in frequent alerts when a hacker tries to break in via SMTP and an ever extending list of blocked IPs. The simplest solution is to not allow anyone to authenticate on SMTP, because nobody should be, but still allow the hosted sites to send mail out and NDRs from the hosting relays to come back.

Is there anyway to set this on WHM 11.42?

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Aug 8, 2013

I'm runnung a server with Apache2 (Apache/2.2.16 (Debian 6.0))

I would like Apache2 listen on port 8080 for IPv4 and on port 80 for IPv6.

This is what I have now:


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Data CPanel :: Upload Attempt Failed - Couldn't Open Remote File

Feb 1, 2015

Every single week I have this problem with the new backup system. Some of the files that need to be transferred to the backup server fails with the following error:

[2015-02-01 06:22:43 +0200] warn [cpbackup_transporter] Upload attempt failed: Couldn't open remote file 'backup_location/weekly/2015-02-01/username.tar.gz': Failure at /usr/local/cpanel/Cpanel/ line 26Click to expand...

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CPanel :: Unable To Load Dynamic Library - Cannot Open Shared Object File

Nov 26, 2014

Linux redhat server.

[26-Nov-2014 16:04:33 Europe/Berlin] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20121212/' - /usr/local/lib/php/extensions/no-debug-non-zts-20121212/ cannot open shared object file: No such file or directory in Unknown on line 0
[26-Nov-2014 16:04:33 Europe/Berlin] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20121212/' - /usr/local/lib/php/extensions/no-debug-non-zts-20121212/ cannot open shared object file: No such file or directory in Unknown on line 0

[Code] ......

I get this error every single time i refresh my website.. so the error_log gets 5MB in no time.

How to solve this problem? Because i do have MEMCACHED and it is running as a service.

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Jun 13, 2014

I had setup WHM and Cpanel then I had added my domain and everything works fine but after some time I have problem with my one email which is receiving highest mails daily. I am not able to delete message to trash for that particular email address also I am not able to access trash folder. These both thing I had tried from webmail if I do from outlook and delete mails (that moves to trash) the mails come again to inbox.

Here is the Exact error I got when I had tried to delete mail from SquirrelMail

ERROR: Connection dropped by IMAP server.
Query: STORE 7431 +FLAGS (Deleted)

and I got the below error when I tried to open trash folder from SquirrelMail

ERROR: Connection dropped by IMAP server.
Query: SELECT {11} INBOX.Trash

However I am able to permanently delete emails directly from inbox so I think problem with the trash folder only. Last time when I had faced this problem I had took backup of mails from FTP, deleted that account and recreated with same address and restored that mails and it solved the problem but after 15 days again I am having same problem so I need to find some optimum solution.

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Feb 19, 2008

Currently I am using Linux + cPAnel and using the port 25 for email sevrer. Currently we facing 1 problem is, some user's ISP is not support port. May I know how can I add additional port into server and allow users to send mail by different port?

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Jun 21, 2009

I have an office internal website and I opened a port in the gateway of my office (7080) to this website (server )'s 80 port. That makes this website open to public as office has static IP. And then when I view the site from home . it's fine. But when I tried to login, the site is using a pop-up, I guess it's http authentciation, login, I was redirected to a url without my port number any more, that stops my access to the site as obviously I would.

How can I keep my connection/port number ...?

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Here's my story: The landlord provides the internet for the house and it goes through a server which has squid installed. Squid in turn seems to block the internal port (or whatever the exact term for that is) for phpmyadmin or webmail in cpanel so I cannot access them.

At my reseller account at Hostgator they said they redirected that port to port80 via mod rewrite and that now works for me. I wonder how I would do the same thing on a dedicated server. I can't see what Hostgator did since it's happening out of my sight somewhere. Otherwise I would just replicate that on my box.

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