Can only Ping past the router. No FTP, or other rotocols. Havetried plunger.

I'm running debian on an Xbox (kinda cool eh?).

Local networking works just dandy. Xbox can talk to the other Linux PC
just fine (FTP, SSH, Etc.). The other machine can ftp/ssh/telnet to the
xbox.

The xbox can ping out into the world past the router. DNS is working
(ping yahoo.com works). The xbox can not use ftp or http out past the
router. There is no indication of anything "blocked" in the router's logs.

The interface is wired to the router's 4-port hub. The router is a
Netgear MR814v2 wireless router on a DSL modem. The router is set up to
provide dhcp (working fine for other PC and notebooks). The interface
on the xbox is set up for dhcp. Ifconfig shows the right IP address and
mask. resolv.conf gets updated with the DNS servers. Route and netstat
-r show the default route to the gateway.

I searched through newsgroups articles and checked all sorts of stuff
I've nevertouched before on the other Linux box. I've adjusted MTU
down, flushed iptables, set /proc/.../ip_forward to 1, used a plunger
(comp.os.linux.plumbing.no.really). All to no avail.

As far as I can tell, this little xbox is configured exactly like the PC
I'm running on right now. This one works, that one doesn't.

This has me baffles (not all that hard to do).

One final note . . . When the Xbox was an Xbox, it took a dhcp address
from the server and roamed across the Net to the wonderful world of
xbox-live (yawn). Needless to say, it's now a Linux machine.

I'm starting to wear patterns in my keyboard typing the same damned
commands over and over. I now type ifconfig with one press of 8 fingers!

Any help is greatly appreciated.



Larz O'Mulliganstein

On Mon, 06 Oct 2003 23:45:45 +0000, Larz O'Mulliganstein wrote:

> I'm running debian on an Xbox (kinda cool eh?).
>
> Local networking works just dandy. Xbox can talk to the other Linux PC
> just fine (FTP, SSH, Etc.). The other machine can ftp/ssh/telnet to the
> xbox.
>
> The xbox can ping out into the world past the router. DNS is working
> (ping yahoo.com works). The xbox can not use ftp or http out past the
> router. There is no indication of anything "blocked" in the router's logs.
>
<<snip>>

The current Xbox Linux kernel was compiled with tcp_ecn=1 (Explicit
Congestion Notification).

Turn this off in /etc/sysctl.conf by adding the line:
net/ipv4/tcp_ecn=0

You'll see a message regarding applying kernel settings during startup.

Thanks to Terry Cole and others in the xbox-linux mailing list for their
help.

Larz

Xbox - a great little Linux server for $120.00 US.
http://xbox-linux.sf.net