[nSLUG] pppoe

M Taylor mctylr at privacy.nb.ca
Fri Aug 16 21:32:22 ADT 2002

On Thu, Aug 15, 2002 at 11:54:41AM -0400, Matt Yanchyshyn wrote:
> Hi,
> I know that last week Peter Cordes was writing about troubles with sprint
> and having tcp_ecn turned on.  I'm in Toronto for a month and have had
> troubles with Sympatico pppoe, so I checked out ECN and it's turned off.
> Seems like so far the only difficulty is sending mail.  Mail sent via my
> domain's SMTP server or sympatico's own fails.  The connection works
> alright aside from that, so what is wrong/what am I missing? I'm not
> running any screwy firewall setups.. so I'm assuming it's the way I have
> pppoe setup. I tried messing with the MTU a bit, but I don't think that
> made much of a difference (aside from noticeable speed ups and downs).

What's the output of 'telnet smtp.machine.host smtp'?
Or if you're really stumped, 'tcpdump -X -v -s 256 -i eth0 port 25' while
you attempt to connect? (That tcpdump parameter list may miss DNS and other 
low level problems)

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