[ale] Need help reading tcpdump output

[Geoffrey]

Have you tried traceroute to these same domains?

Jim Philips wrote:
> Try running an ifconfig on your ppp0 interface with the cable modem and
> with DSL. You may find that MTU is different depending on the device you
> use to connect. I had major connection problenms with DSL a few weeks
> ago. They all went away when I reduced MTU to 1474 from 1492.
> 
> 
> On Thu, 2002-02-14 at 19:51, Gary MacKay wrote:
> 
>>I have a cable modem and a DSL line in my office. I use the cable modem
>>to serve 'net access to my internal network and the DSL only has my
>>email/web server on it. I am having problems sending email to a few
>>domains, not all, just a few. I found I can telnet to port 25 of one of
>>the failing domains via my cable modem, but not via the DSL line. Below
>>are the first packett trace of each. The only thing I can see different
>>is the flags SWE instead of just S. I do not know enough about the flags
>>to know what that means nor how to fix it. The address I'm trying to
>>send email to is 170.206.225.44.
>>
>>--------DSL Line: fails
>>19:32:35.162544 207.87.222.229.15255 > 170.206.225.44.25: SWE
>>3747157433:3747157433(0) win 5840 <mss 1460,sackOK,timestamp 303797345
>>0,nop,wscale 0> (DF) [tos 0x10]
>>
>>--------Cable modem: works
>>15:39:37.774455 11.22.33.44.41159 > 170.206.225.44.25: S
>>3934758720:3934758720(0) win 5840 <mss 1460,sackOK,timestamp 329647437
>>0,nop,wscale 0> (DF) [tos 0x10]
>>
>>Both lines have a firewall with the exact same firewall rules, except
>>for ports 25 and 110 on the DSL line. What am I missing?
>>
>>- Gary
>>
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>>
> 
> 
> 
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-- 
Until later: Geoffrey		esoteric at 3times25.net

"...the system (Microsoft passport) carries significant risks to users that
are not made adequately clear in the technical documentation available."
- David P. Kormann and Aviel D. Rubin, AT&T Labs - Research
- http://www.avirubin.com/passport.html


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