The problem seems to have been that tcp congestion notification 
(net.ipv4.tcp_ecn) had been turned on, which doesn't work and play 
well with my internet connection. Turning it off got things working 
again.

My guess (and it's only a guess) is that /etc/sysctl.conf was tweaked 
when I emerged sys-apps/baselayout back on June 10. When I rebooted 
the machine yesterday morning, it got a new ECN setting, which hosed 
things.

Well, that blew a few hours of my time. Feh. :-)

On Sat, 9 Jul 2005, Paul Heinlein wrote:

> I got an odd new problem.
>
> The host in question is on a five-node LAN sitting behind a NAT gateway.
>
> I can
>
> a. ping any host on the LAN or Internet (i.e., ICMP works fine)
> b. query any DNS server on LAN or Internet (UDP works fine)
> c. receive TCP connections from LAN or Internet
> d. initiate TCP connections to hosts on LAN
>
> I cannot
>
> * initiate TCP connections to hosts on the Internet
>
> The problem isn't specific to any TCP protocol; they all fail: smtp, telnet, 
> ftp, http, ...
>
> I'm working on isolating the interesting parts of strace output; right now 
> the only thing that leaps out at me is that connect() is timing out, e.g.,
>
> connect(3, {sa_family=AF_INET, sin_port=htons(80), 
> sin_addr=inet_addr("129.95.36.100")}, 16) = -1 ETIMEDOUT (Connection timed 
> out)
>
> Clues?
>
> -- Paul Heinlein <heinlein@...>
> -- 
> gentoo-sparc@g.o mailing list
>
>

-- Paul Heinlein <heinlein@...>
-- 
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