Linux DSL router box/firewall problem

I'm running a dsl router using coyote linux and the 'seawall' firewall.
I have Verizon dsl and have been running Win98SE comuters a long while.
We just got a WinXP machine and find that certain programs 'drop' the
internet connection, such as streaming applications like RealOne,
Webshots, Weatherbug, and Incredimail. Also, the connection breaks when
doing a Windows Update (about at 66 %). Any clues? I am new to Linux, a
friend set up the box for me, but have no contact with him now. I'm told
it's not an unusual configuration.

My appologies if I'm in the wrong group for this. If I am, however,
where should I go?


Thanx in advance. -S.D.

Stan Dowd wrote:

> I'm running a dsl router using coyote linux and the 'seawall'
> firewall. I have Verizon dsl and have been running Win98SE comuters a
> long while. We just got a WinXP machine and find that certain programs
> 'drop' the internet connection, such as streaming applications like
> RealOne, Webshots, Weatherbug, and Incredimail. Also, the connection
> breaks when doing a Windows Update (about at 66 %). Any clues? I am
> new to Linux, a friend set up the box for me, but have no contact with
> him now. I'm told it's not an unusual configuration.
>
> My appologies if I'm in the wrong group for this. If I am, however,
> where should I go?
>
>
> Thanx in advance. -S.D.


I am unclear from your message.

Are you having loss of connection problems when using Linux or are you
having the problems when using XP?


Clive

On Wed, 21 Apr 2004, Stan Dowd <(E-Mail Removed)> wrote:
> I'm running a dsl router using coyote linux and the 'seawall' firewall.
> I have Verizon dsl and have been running Win98SE comuters a long while.
> We just got a WinXP machine and find that certain programs 'drop' the
> internet connection, such as streaming applications like RealOne,
> Webshots, Weatherbug, and Incredimail. Also, the connection breaks when
> doing a Windows Update (about at 66 %). Any clues? I am new to Linux, a
> friend set up the box for me, but have no contact with him now. I'm told
> it's not an unusual configuration.

Maybe your firewall is too secure and blocking mtu path discovery. PPPoE
has an 8-byte header so its max mtu is 1492. Maybe XP is setting MSS
1460, so the other side thinks it can send 1500 byte packets, but they get
fragmented or blocked by the 1492 byte pppoe hole.

While I have never had any trouble accessing the internet from behind a
Linux or hardware router, I have had trouble with connections initiated
from internet (incoming smtp would timeout waiting for data transfer). My
solution was to set LAN nic of smtp server to same mtu 1492 as my pppoe.
In Linux mtu can be set on the fly with ifconfig, but I would not know how
to do that in XP.

--
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http://www.autox.chicago.il.us/ http://www.berniesfloral.net/