strange networking problem with kernel 2.4.21
I've tried the current kernel-image-2.4.21-sparc64 (v 31) on an Ultra
1 and have a strange networking problem with it. I can't make
connexions off our local net for some reason. On-site all seems OK.
An strace of an interrupted `ftp ftp.debian.org' ends like this, where
the successful call to 148.79.80.70 is the local name server:
poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
ioctl(3, 0x4004667f, 0xefffd058) = 0
recvfrom(3, "\17\3\201\200\0\1\0\1\0\3\0\0\003131\00280\003101\0031"..., 1024, 0, {sin_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("148.79.80.70")}}, [16]) = 157
close(3) = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3
connect(3, {sin_family=AF_INET, sin_port=htons(21), sin_addr=inet_addr("208.185.25.38")}}, 16) = -1 ETIMEDOUT (Connection timed out)
write(2, "ftp: ", 5ftp: ) = 5
write(2, "connect 208.185.25.38", 21connect 208.185.25.38) = 21
write(2, ": ", 2: ) = 2
write(2, "Connection timed out\n", 21Connection timed out
) = 21
close(3) = 0
socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3
connect(3, {sin_family=AF_INET, sin_port=htons(21), sin_addr=inet_addr("128.101.80.131")}}, 16 <unfinished ...>
Random telnet off-site does the same.
If I simply reboot with the old (2.4.19) kernel, ftp and telnet work
fine, so it's definitely kernel related.
Since I assume this isn't a general problem, does anyone have
suggestions for what's wrong or for debugging that won't involve lots
of work?
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