Defaults ports open on cisco ASA 5520

[Nilesh Joshi]

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

[Jennifer Halim · Accepted solution]

None if you have not configured anything to be opened.

[Nilesh Joshi]

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

[Jennifer Halim]

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?