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SubjectRe: weird socket refusal by kernel 2.2.11
On Thu, 12 Aug 1999, Tim Waugh wrote:

> On Thu, 12 Aug 1999, Jim Woodward wrote:
>
> > Very strange thing happened, the 486 wouldnt accept any connections to it
> > I logged in to it from the console, no firewall problems were logged,
> > nothing logged in /var/log/secure, infact it said there that the
> > connection was accepted and not refused.
>
> Can you grab the network traffic when this happens (using tcpdump)?

I think I got it all this time..

if somebody wants my kernel .config file then just let me know..

this only started happening with 2.2.11 and didnt occur with 2.0.36, 2.2.0
through 2.2.10 (and ive used just about every version on that 486)

nothing new has been enabled as far as i can see, anyhow
details follow:


22:20:28.769058 pandora.woodward.southcom.com.au.1225 >
jim.southcom.com.au.telnet: S 3074264903:3074264903(0) win 16060 <mss
1460,sackOK,timestamp 8119158[|tcp]> (DF) [tos 0x10] 22:20:28.771261
jim.southcom.com.au.telnet > pandora.woodward.southcom.com.au.1225: S
2586416205:2586416205(0) ack 3074264904 win 16060 <mss
1460,sackOK,timestamp 489803[|tcp]> (DF) 22:20:28.771382
pandora.woodward.southcom.com.au.1225 > jim.southcom.com.au.telnet: . ack
1 win 16060 <nop,nop,timestamp 8119158 489803> (DF) [tos 0x10]
22:20:28.773674 pandora.woodward.southcom.com.au.1225 >
jim.southcom.com.au.telnet: P 1:25(24) ack 1 win 16060 <nop,nop,timestamp
8119159 489803> (DF) [tos 0x10] 22:20:28.775380 jim.southcom.com.au.telnet
> pandora.woodward.southcom.com.au.1225: . ack 25 win 16060
<nop,nop,timestamp 489803 8119159> (DF) 22:20:28.777647
jim.southcom.com.au.telnet > pandora.woodward.southcom.com.au.1225: R
1:1(0) ack 25 win 16060 <nop,nop,timestamp 489803 8119159> (DF)

: F 1:1(0) ack 2 win 16060 <nop,nop,timestamp 8129309 499957> (DF) [tos
0x10] 22:22:10.278208 jim.southcom.com.au.smtp >
pandora.woodward.southcom.com.au.1228: . ack 2 win 16060
<nop,nop,timestamp 499957 8129309> (DF) 22:22:10.581921
pandora.woodward.southcom.com.au.1220 > jim.southcom.com.au.8080: P
2862219069:2862219446(377) ack 2366343734 win 15928 <nop,nop,timestamp
8129339 471542> (DF) 22:22:10.582960 pandora.woodward.southcom.com.au.1220
> jim.southcom.com.au.8080: F 377:377(0) ack 1 win 15928
<nop,nop,timestamp 8129340 471542> (DF) 22:22:10.583834
pandora.woodward.southcom.com.au.1229 > jim.southcom.com.au.8080: S
3168407697:3168407697(0) win 16060 <mss 1460,sackOK,timestamp
8129340[|tcp]> (DF) 22:22:10.584647 jim.southcom.com.au.8080 >
pandora.woodward.southcom.com.au.1220: R 2366343734:2366343734(0) win 0
22:22:10.585826 jim.southcom.com.au.8080 >
pandora.woodward.southcom.com.au.1220: R 2366343734:2366343734(0) win 0
22:22:10.587187 jim.southcom.com.au.8080 >
pandora.woodward.southcom.com.au.1229: S 2680285329:2680285329(0) ack
3168407698 win 16060 <mss 1460,sackOK,timestamp 499988[|tcp]> (DF)
22:22:10.587281 pandora.woodward.southcom.com.au.1229 >
jim.southcom.com.au.8080: . ack 1 win 16060 <nop,nop,timestamp 8129340
499988> (DF) 22:22:10.591104 pandora.woodward.southcom.com.au.1229 >
jim.southcom.com.au.8080: P 1:378(377) ack 1 win 16060 <nop,nop,timestamp
8129340 499988> (DF) 22:22:10.593413 jim.southcom.com.au.8080 >
pandora.woodward.southcom.com.au.1229: . ack 378 win 16060
<nop,nop,timestamp 499989 8129340> (DF)
tcpdump: listening on eth0

22:22:51.035008 pandora.woodward.southcom.com.au.1023 > jim.southcom.com.au.22:
P 2434805549:2434805569(20) ack 1930932161 win 15928 <nop,nop,timestamp 8133385
493072> (DF) [tos 0x10]
22:22:51.157537 jim.southcom.com.au.22 > pandora.woodward.southcom.com.au.1023:
. ack 20 win 16060 <nop,nop,timestamp 504047 8133385> (DF) [tos 0x10]
22:22:51.541655 pandora.woodward.southcom.com.au.1023 > jim.southcom.com.au.22:
P 20:40(20) ack 1 win 15928 <nop,nop,timestamp 8133435 504047> (DF) [tos 0x10]
22:22:51.557154 jim.southcom.com.au.22 > pandora.woodward.southcom.com.au.1023:
. ack 40 win 16060 <nop,nop,timestamp 504087 8133435> (DF) [tos 0x10]
22:22:56.155101 arp who-has pandora.woodward.southcom.com.au tell keystone.woodward.southcom.com.au
22:22:56.155166 arp reply pandora.woodward.southcom.com.au is-at 0:0:1:0:b8:b3

i try a traceroute from my pentium to the outside while the networks down,
it gets to the gateway (which is on the other end of the ethernet) and
then stops..

[jim@pandora /home]$ traceroute auggie
traceroute to yyy.yyyyyyy.net (208.138.xxx.xxx), 30 hops max, 40 byte packets
1 keystone (203.39.xxx.xx) 2.426 ms 1.582 ms 1.548 ms
2 * * *
when i try an ls after the network comes back..

bash: fork: Cannot allocate memory


in /var/log/messages i find:

Aug 13 22:12:19 jim inetd[381]: fork: Cannot allocate memory
Aug 13 22:13:09 jim last message repeated 2 times
Aug 13 22:17:24 jim inetd[381]: fork: Cannot allocate memory

on the same machine, memory resources:

total used free shared buffers cached
Mem: 22176 19460 2716 16604 992 4856
-/+ buffers/cache: 13612 8564
Swap: 63480 4412 59068

on the same machine, the free pages under proc:

[22:20:51] jim@jim:~$ cat /proc/sys/vm/freepages
48 96 144


any ideas?


--
Haga que ridiculo baile Funky Waiter!
_______________________________________________________________________
| name: james woodward (jim@jim.southcom.com.au) |
| www: http://www.jim.southcom.com.au, http://www.toto.southcom.com.au |
| www: http://www.mailbag.southcom.com.au |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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