I am having a weird problem. One person is unable to access our zimbra server for some reason. It is only at their house and I have added their IP address to allow in our firewall and there was no block on their IP address previously. I am able to access it from that computer if I am using a proxy but I can't find anything in my iptables blocking them.
When I search IP tables this is what I get:
mail ~: iptables -L -n --line | grep xx.xxx.xx.xxx
1 ACCEPT all -- xx.xxx.xx.xxx 0.0.0.0/0
1 ACCEPT all -- 0.0.0.0/0 xx.xxx.xx.xxx
Can someone please help me figure out why they can't connect? They were able to access it fine for the past year or so and then all of a sudden it stopped working the other day and I made no changes to anything.