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Hi,

I have an OpenBSD 3.5-stable (GENERIC) i386. It acts as a
firewall/router. This is the second time that this idle+0x20 error
happened to my OpenBSD machine. A reboot seems to clear up the
problem. But I'd like to know why I have the problem and how can I
solve it.

I did some searching, but not much information came out. I'd
appreciate any URL, guide or explanation.

Thank you in advance.

The hardware:

Pentium-II 350MHz
128MB RAM
2 GB IDE HDD
3 NICs:
* xl0 3Com 3c905B 100Base-TX rev 0x30
* xl1 3Com 3c905B 100Base-TX rev 0x30
* fxp0 Intel 82557 rev 0x05

Aside from pf, it runs sshd, isakmpd and sendmail (for local daemons
to use)

This is from /var/log/messages:

Feb 15 10:02:33 dsl /bsd: arplookup: unable to enter address for
12.34.56.78
Feb 15 15:03:44 dsl isakmpd[20371]: transport_send_messages: giving up
on message 0x3c137100, exchange INTRA
Feb 15 15:03:44 dsl isakmpd[20371]: transport_send_messages: either
this message did not reach the other peer
Feb 15 15:03:44 dsl isakmpd[20371]: transport_send_messages: or the
responsemessage did not reach us back
Feb 15 10:04:47 dsl /bsd: Stopped at idle+0x20: jmp idle
Feb 15 10:04:47 dsl /bsd: ddb> machine print examine x
search set

Feb 15 10:04:47 dsl /bsd: write w delete d
break dwatch
Feb 15 10:04:47 dsl /bsd: watch step s continue
c until
Feb 15 10:04:47 dsl /bsd: next match trace call
ps callout
Feb 15 10:04:47 dsl /bsd: show boot help hangman
dmesg
Feb 15 10:04:47 dsl /bsd: ddb>
Feb 15 10:04:48 dsl /bsd: arplookup: unable to enter address for
12.34.56.78