Date: Wed, 29 May 2002 19:26:41 -0400 From: Bill Moran <wmoran@potentialtech.com> To: Pete C <christie@idsi.net> Cc: questions@freebsd.org Subject: Re: User PPP and dial in ISP Message-ID: <3CF563B1.4090207@potentialtech.com> References: <3CF55EC8.9030707@idsi.net>
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Pete C wrote: > I recently started experimenting with FreeBSD PPP for use as a > router/gateway for my home network (just two machines right now, one > FreeBSD box and one Win98). > I have it up and running, but am wondering about alot of what seem to be > 'random' attempts to connect. Do you have any daemons running that might do DNS lookups? I've seen this from named mostly, but other daemons as well. When things expire, the daemon will try to refresh the information. There are lots of daemons that may periodically want to contact another computer on the internet. It's not really random, it's just that you aren't aware of what's really happening. One thing to do is to run tcpdump on the tun0 (or whatever) interface and wait for the "random" dial-out to occur. The port# may be enough to tell you what's going on, or you may have to do a little more digging if it's just a DNS query. named has an option that tells it to batch it's DNS refreshes to avoid extraneous dialouts. Many other daemons will have similar options. For ones that don't, you may want to consider firewalling your system to prevent them from contacting the Internet (NFS or SMB are good examples) -- Bill Moran Potential Technology http://www.potentialtech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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