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Cisco ASA Firewall blocking port 25 (smtp) traffic

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.

1 REPLY

Re: Cisco ASA Firewall blocking port 25 (smtp) traffic

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

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