Server Firewall preventing sending of email [migrated]
- by Jo Fitzgerald
The firewall on my VPS appears to be preventing my site from sending email. It was working fine until the end of last month. My hosting provider (Webfusion) has been next to useless.
I am able to send email if I open INPUT ports 32768-65535, but not if these ports are closed. Why would this be?
I have the following rules in my firewall:
# sudo iptables -L
Chain INPUT (policy DROP)
target prot opt source destination
VZ_INPUT all -- anywhere anywhere
Chain FORWARD (policy DROP)
target prot opt source destination
VZ_FORWARD all -- anywhere anywhere
Chain OUTPUT (policy DROP)
target prot opt source destination
VZ_OUTPUT all -- anywhere anywhere
Chain VZ_FORWARD (1 references)
target prot opt source destination
Chain VZ_INPUT (1 references)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere tcp dpt:www
ACCEPT tcp -- anywhere anywhere tcp dpt:https
ACCEPT tcp -- anywhere anywhere tcp dpt:smtp
ACCEPT tcp -- anywhere anywhere tcp dpt:ssmtp
ACCEPT tcp -- anywhere anywhere tcp dpt:pop3
ACCEPT tcp -- anywhere anywhere tcp dpt:domain
ACCEPT udp -- anywhere anywhere udp dpt:domain
ACCEPT tcp -- anywhere anywhere tcp dpts:32768:65535
ACCEPT udp -- anywhere anywhere udp dpts:32768:65535
ACCEPT tcp -- localhost.localdomain localhost.localdomain
ACCEPT udp -- localhost.localdomain localhost.localdomain
Chain VZ_OUTPUT (1 references)
target prot opt source destination
ACCEPT tcp -- anywhere anywhere
ACCEPT udp -- anywhere anywhere
The VPS is running Plesk 10.4.4
(please ask if you require further technical information to help me)
