Restrictions on outgoing UDP

Hedloff

Well-Known Member
Jun 7, 2004
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DataCenter Provider
Hello,

We have sometimes problems with joomla and other scripts get hacked. And the hackers upload .php code for us on attacks.
They use their code to send udp traffic and fill our flow sessions with this kind of attack.
Is there anyway we can limit outgoing udp traffic from cPanel servers somehow?
 

cPanelMichael

Technical Support Community Manager
Staff member
Apr 11, 2011
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Hello :)

There is no native cPanel functionality to block traffic, however you are welcome to install a third-party firewall such as CSF. The following URL mentions the ports used by cPanel and the most common services so you can get a better understanding of what type of traffic should be allowed:

Getting the most out of your system firewall

However, in general, you should try to ensure that the scripts installed on your server are secure and up to date to prevent the attacks from occurring at all.

Thank you.
 

quizknows

Well-Known Member
Oct 20, 2009
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CSF does egress filtering, but you're going about security the wrong way. Your customers need to secure their passwords and keep Joomla up to date. If they had done that in the first place, you wouldn't have to worry about the outbound UDP traffic. I know it's not that easy, but you should suspend or terminate people who don't secure their web applications.