My newly installed rh7.2 server running sendmail cannot be accessed from my outlook clients uless I flush the ipchain rules. Can anybody look at this etc\sysconfig\ipchains and suggest a fix?
:input ACCEPT
:forward ACCEPT
:output ACCEPT
-A input-s 0/0 -d 0/0 25 -p tcp -y -j ACCEPT
-A input -s 0/0 -d 0/0 22 -p tcp -y -j ACCEPT
-A input -s 0/0 67:68 -d 0/0 67:68 -p udp -i eth0 -j ACCEPT
-A input -s 0/0 67:68 -d 0/0 67:68 -p udp -i eth1 -j ACCEPT
-A input -s 0/0 -d 0/0 -i lo -j ACCEPT
-Ainput -p tcp -s 0/0 -d 0/0 0:1023 -y -j REJECT
-A input -p tcp -s 0/0 -d 0/0 2049 -y -j REJECT
-A input -p udp -s 0/0 -d 0/0 0:1023 -j REJECT
-A input -p udp -s 0/0 -d 0/0 2049 -j REJECT
-A input -p tcp -s 0/0 -d 0/0 6000:6009 -y -j REJECT
-A input -p tcp -s 0/0 -d 0/0 7100 -y -j REJECT
I’m pretty sure it’s rules 6&8, but I’ve tried deleting just those to no avail. So I just flush the whole thing and then clients can Pop the mail fine.