Question

Pix 501 block all outbound ports

Asked by: hpmservices

I want to block all outbound ports, then open only ports I need like 80, 8080, 5001, 443 and so on.

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Asked On
2009-02-23 at 20:51:24ID24170942
Tags

PIX510

,

Ports

,

Blocking

,

All

,

OutBound

Topics

Cisco PIX Firewall

,

Networking Hardware Firewalls

Participating Experts
4
Points
125
Comments
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Answers

 

by: uetian1707Posted on 2009-02-23 at 23:54:41ID: 23719191

 

by: PeteLongPosted on 2009-02-24 at 02:38:21ID: 23720000

Well, you dont need to deny anything as soon as you allow things then everythign else is blocked so

access-list outbound permit tcp any any eq http
access-list outbound permit tcp any any eq https
access-list outbound permit tcp any any eq 8080
access-list outbound permit tcp any any eq 5001
access-group outbound in interface inside

 Will only let Ports 80, 8080, 5001 and 443 out and block everything else

 

by: devangshroffPosted on 2009-02-24 at 04:15:21ID: 23720615

peteLong  has provided correct ans for this

 

by: Donnie4572Posted on 2009-02-24 at 08:58:49ID: 23723561

The Pix assumes that all traffic originating from the inside is safe and therefore allows all outbound connections on any port, by default.
I think this is a huge security hole and poor design for Cisco or any firewall!

So, if you define an access-list on the inside interface, as described above, you will effectively limit outbound traffic to only traffic defined in the access-list.


Donnie

20120131-EE-VQP-002

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