Re: Cisco Workaround

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To: "Alvaro Gordon-Escobar" <alvaroge@molecularstaging.com>
Date: Thu, 24 Jul 2003 08:23:00 +0800

Hi Alvaro,
              DNS is using port 53, I think you should consider unblock
this port if you want your DNS to communicate with your ISP DNS.

Rdgs,
Bryan

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|---------+------------------------------->
| | "Alvaro |
| | Gordon-Escobar" |
| | <alvaroge@moleculars|
| | taging.com> |
| | |
| | 07/23/2003 10:15 PM |
| | |
|---------+------------------------------->
>---------------------------------------------------------------------------------------------------------------------------------------------|
  | |
  | To: <firewalls@securityfocus.com>, <security-basics@securityfocus.com> |
  | cc: |
  | Subject: Cisco Workaround |
>---------------------------------------------------------------------------------------------------------------------------------------------|

will this access list modification prevent my internal DNS server from
updates to it self from my telco's DNS server?

access-list 101 deny 53 any any
access-list 101 deny 55 any any
access-list 101 deny 77 any any
access-list 101 deny 103 any any
!--- insert any other previously applied ACL entries here
!--- you must permit other protocols through to allow normal
!--- traffic -- previously defined permit lists will work
!--- or you may use the permit ip any any shown here
access-list 101 permit ip any any

Thanks in advance

~alvaro Escobar

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• Previous message: David Moisan: "Re: building an FAQ for Security-Basics"
• Maybe in reply to: Alvaro Gordon-Escobar: "Cisco Workaround"
• Next in thread: dave kleiman: "RE: Cisco Workaround"
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