SOLVED Is it possible that ConfigServer Security & Firewall blocks communication of WHMCS with registrar?

Operating System & Version
CENTOS 7.8
cPanel & WHM Version
v88.0.10

Jeromero

Active Member
Aug 6, 2019
25
3
3
Johannesburg , South Africa
cPanel Access Level
Website Owner
Hi all,
we installed ConfigServer Security & Firewall yesterday and last night I noticed that I cannot update (nor register) domains with registrar through WHMCS.
I have contacted the registrar and they confirmed there is no problem at their end.
Does anyone know what setting might be wrong in CSF that could possibly block registrar communication through WHMCS?

Thanks
 

ffeingol

Well-Known Member
PartnerNOC
Nov 9, 2001
532
160
343
cPanel Access Level
DataCenter Provider
You'll prob. want to check with your registrar and see what port you use to communicate with them. Then make sure that port is in TCP_OUT (assuming it's TCP) or put in a specific entry into csf.allow.

You can grep through /var/log/messages and search for TCP_OUT or UDP_OUT to find any blocked outbound connections.