Cisco ASA Firewall blocking port 25 (smtp) traffic

Unanswered Question
Aug 5th, 2008

Hi,

I am getting the following log on my firewall and some mails don't seem to come into our mail server.

Deny TCP (no connection) from 192.168.x.y/25 to a.b.16.4/40277 flags FIN ACK on interface IF_INSIDE

Deny TCP (no connection) from 192.168.x.y/25 to a.b.16.4/40277 flags PSH ACK on interface IF_INSIDE

Deny TCP (no connection) from 192.168.x.y/25 to a.b.16.4/45069 flags FIN ACK on interface IF_INSIDE

Deny TCP (no connection) from 192.168.x.y/25 to a.b.16.4/45069 flags PSH ACK on interface IF_INSIDE

What can be the cause of this??

No ACLs.

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
Marwan ALshawi Tue, 08/05/2008 - 06:06

where is ur server located ?

any way if u want to permit smtp from outside to inside

lets say ur mail server in the inside is 192.168.1.1

static (inside, outisde) tcp iinterface 25 192.168.1.1 25 netmask 255.255.255.255

access-list 100 permit tcp any interface eq 25

access-group in interface outside

try it

if helpful rate

Actions

This Discussion