I have a VPS with Centos and with firewall that I used to configure by Lxadmin. Now I don't have Lxadmin control panel and can't go to change it by web interface. How to discover what firewall I have on my machine and where is the config with blocked IP so I can remove mine?
On CentOS, the default location for iptables rules are
/etc/syconfig/iptables. If you want to whitelist your work IP, add this right after the
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT line:
-A INPUT -i eth0 -p tcp -s <YOUR_WORK_IP> -j ACCEPT
You can check for iptables by just typing the command
EDIT: ... can you get to a shell?