Hello again everybody,
I have installed linux 2.0.30 (Slackware 3.3) on a machine located
remotely from my office connected with ISDN dial-on-demand modem. I
have diagnosed the dial-out of this machine with TCPDUMP to see why the
machine is dialing out for no reason every 6 minutes or so.
This is the packet that is received from tcp dump from remote host
15:28:08.980232 arp who-has ryno.cit-llc.com tell durham.cit-llc.com
ryno is another linux machine on my LAN and durham is the machine on the
remote end that I would like to prevent from dialing out when this
Now, I ran into a similar problem in a previous version of linux and
modified the /usr/src/linux/net/ipv4/arp.c file and recompiling and
restarting the new kernel. This has not worked yet as I have tried
different values for the ARP_TIMEOUT and other variables in that file.
Not sure how I can prevent this dial-out from the remote machine.
In case it matters the ISDN boxes that I use are from COMBINET now owned
by Cisco. Maybe I can filter ARP packets from the ISDN modem?
All help is greatly appreciated. (I need to save money on this phone
\ Kessler/Asher Group at | Whois: JV208 /
\ the CBOE | phone (312)786-4779 /
______ _______ _________ __ __ ______
/ ____/ /__ __/ /___ ___/ / / / / / ____/
/ / / / / / _____ / / / / / /
/ /____ __/ /__ / / /____/ / /_____ / /____ / /____
/______/ /______/ /_/ /_______/ /______/ /______/