My company have a firewall Linux / iptables, managed by firewallbuilder.
There is a user in my company, that needs to access a another company using a VPN client (Check Point VPN-1 SecureClient NGX R60 HFA2). But I am not able to perform this configuration in firewallbuilder / iptables.
The another company IT, which has firewall checkpoint, said that I needed just allow udp 500 port to ther firewall and put the rule as stateful. I confirmed that all rules in firewallbuilder are stateful by default and even allow all ports from client to destination, the VPN client does not work.
How can I troubleshoot this problem?