Somethings going to cost me a zillion dollars unless you help

[Richard Seymour <rseymour@anarchysoftware.com>]

I'm hooked up to an ISDN router (Pipeline Ascend 75) that is configured to
connect on demand and disconnect after 120 seconds of inactivity. As of
this morning, I noticed that the connection was not going down even after
the 2 minutes of inactivity.

In order to figure out what is keeping my connection open, I shut off all
the other systems on the network (in order to isolate the process to
either the router or my Linux box). Then I had a technician from my ISP
telnet into my router and make sure that all the obvious settings were
correct (they were).

So I'm pretty sure that something is happening on my Linux box that is
causing this.

I did this:

# ps aux

...and got the following output. Any ideas on which of these processes
might be the culprit? Which can I kill and which can I not while
debugging?

Thanks

USER       PID %CPU %MEM  SIZE   RSS TTY STAT START   TIME COMMAND
bin        311  0.0  0.0   772     0  ?  SW  Nov  9   0:00 (portmap)
daemon     289  0.0  0.0   792     0  ?  SW  Nov  9   0:00 (atd)
root         1  0.0  0.8   776   120  ?  S   Nov  9   0:03 init 
root         2  0.0  0.0     0     0  ?  SW  Nov  9   0:01 (kflushd)
root         3  0.0  0.0     0     0  ?  SW< Nov  9   0:00 (kswapd)
root        46  0.0  0.3   748    48  ?  S   Nov  9   0:00 /sbin/kerneld 
root       269  0.0  1.2   808   188  ?  S   Nov  9   0:03 syslogd 
root       278  0.0  0.0   788     0  ?  SW  Nov  9   0:00 (klogd)
root       300  0.0  0.8   860   124  ?  S   Nov  9   0:00 crond 
root       322  0.0  1.1  1248   176  ?  S   Nov  9   0:00 /usr/sbin/snmpd -f 
root       334  0.0  0.0   784     0  ?  SW  Nov  9   0:00 (inetd)
root       345  0.0  0.0   996     0  ?  SW  Nov  9   0:00 (named)
root       356  0.0  0.0   832     0  ?  SW  Nov  9   0:00 (lpd)
root       369  0.0  0.5   860    80  ?  S   Nov  9   0:00 rpc.mountd 
root       378  0.0  0.5  1020    80  ?  S   Nov  9   0:26 rpc.nfsd 
root       392  0.0  2.6  1408   396  ?  S   Nov  9   0:03 sendmail: accepting c
root       404  0.0  0.5   756    76  ?  S   Nov  9   0:19 gpm -t ps/2 
root       451  0.0  0.4   928    68  ?  S   Nov  9   0:35 /usr/sbin/rinetd 
root       454  0.0  0.1   732    24  ?  S   Nov  9   0:00 update (bdflush) 
root      2664  0.0  5.2  1800   768  ?  S    18:24   0:00 smbd 
root      2797  0.0  6.4  1496   940   3 S    18:48   0:00 /bin/login -- root 
root      2804  0.0  5.5  1232   816   3 S    18:48   0:00 -bash 
root      2892  0.0  2.0   740   304   1 S    19:31   0:00 /sbin/mingetty tty1 
root      2894  0.0  2.0   740   304   2 S    19:31   0:00 /sbin/mingetty tty2 
root      2896  0.0  2.0   740   304   4 S    19:31   0:00 /sbin/mingetty tty4 
root      2910  0.0  2.0   740   304   5 S    19:34   0:00 /sbin/mingetty tty5 
root      2916  0.6  2.0   740   304   6 S    19:35   0:00 /sbin/mingetty tty6 
root      2917  0.0  3.3   860   488   3 R    19:35   0:00 ps aux 
root     23575  0.0  0.5  1484    88  ?  S   Nov 29   0:00 (smbd)
root     23577  0.0  2.3  1328   352  ?  S   Nov 29   0:03 nmbd 

--
Richard Seymour, Anarchy Software, Inc.
anarchy@anarchysoftware.com

The opinions expressed are those of my employer, not my own.