RE: DLSW UDP ports

From: Scott Morris (swm@emanon.com)
Date: Mon May 16 2005 - 16:39:53 GMT-3


The UDP stuff is for non-critical traffic, such as "canureach" and things
like that...

HTH,

Scott

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
eward15@juno.com
Sent: Monday, May 16, 2005 3:23 PM
To: ccielab@groupstudy.com
Subject: DLSW UDP ports

I was doing a packet capture between two routers to compare DLSw ports. I
was searching the archives when I ran across this post from Scott Morris:

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Well... Those aren't exactly helpful as they are the original RFC
implementation of DLSW. But a good idea to look there anyway!

Access-list 100 deny tcp any range 11000 11999 any eq 2065 (incoming)
Access-list 100 deny tcp any eq 2065 any range 11000 11999 (outgoing)
Access-list 100 deny udp any eq 0 any eq 2067 (incoming) Access-list 100
deny udp any eq 2067 any eq 0 (outgoing) Access-list 100 permit ip any any

The original way was from 2067 to 2065 both ways.

Scott

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I was able to see the tcp ports and the tcp keepalives; however, I didn't
get a chance to establish a ciruit between two computers. Can I assume that
the UDP ports are for explorer traffic? (I will lab this up when I get a
chance.)

Eugene Ward



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