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New Member

Defaults ports open on cisco ASA 5520

Hi,

Please guide me what are default ports are open on asa 5520 from outside interface  (Zero level Security ) to inside interface  (Security level 100)

Thanking you

With Regards

Nil Jos

  • Firewalling
1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Defaults ports open on cisco ASA 5520

None if you have not configured anything to be opened.

3 REPLIES
Cisco Employee

Defaults ports open on cisco ASA 5520

None if you have not configured anything to be opened.

New Member

Defaults ports open on cisco ASA 5520

Jennifer,

Earlier i was with same impression as you have but yesterday

I found below ports  open on my asa by default without adding any configuration line from outside to inside

i think some additional ports are also open by default if anybody have please share it

pop.gmail & imap.gmail in outlook were working without any changes on firewall

  • 465 (SMTPS)
  • 587 (SMTP/TLS)
  • 993 (IMAPS)

Please let me correct

Thanking you

Niljos

T

Cisco Employee

Defaults ports open on cisco ASA 5520

Are you sure those connection is inbound towards the firewall and/or actually going through the firewall?

Or are they initiated from inside as an outbound connection?

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