[KLUG Members] re: New SuSE installation

[Adam Williams]

>>So the FTP server is remote?  (Hence the router and the ftp.suse.com
>>name.)  Try disableing ECN.  What brand/type of device is
>0:a0:c5:e0:45:d?
>That's my router.  Netgear RT328 (one ISDN port, one ethernet).  It's
>running NAT to a static IP, and has yet to screw anything up.

It isn't neccesarily your router,  just A router, somewhere.

>>It is interesting that we don't see any packets coming back from the
>>conntection attempt,  makes me think ECN incompatibility.
>What's ECN?  I see it in the log but I'm not familiar with the term.

Explicit/Enhanced-Congestions-<i>something</i>.  Basically a form of
"intelligent" flow control for IP implemented in the stack and represented
by a bit in the IP packet header.

>So SuSE put on their FTP server a CD image with download code that is
>not compatible with their FTP server?  That's pretty bad.

It isn't neccesarily them.  Anyone in between who doesn't support ECN will
get your packet tossed.  Linux beat the rest of the world to the punch
implementing ECN (which is a good thing,  would make a more efficient
Internet),  but devices that don't support ECN are still around aplenty.
Especially at service providers milking every last packet out of the
lifetime of those really expensive routers made by companies that are now
dust.

Try "/sbin/sysctl -w net.ipv4.tcp_ecn=0"