Date: Wed, 7 May 1997 15:07:06 +0100 (BST) From: Stephen Roome <steve@visint.co.uk> To: freebsd-current@freebsd.org, freebsd-isp@freebsd.org Subject: tun0 problem in 3.0-970209-SNAP Message-ID: <Pine.BSF.3.91.970507144915.6423H-100000@bagpuss.visint.co.uk>
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Not sure if this is a problem and whether is persists in newer versions.
Anyway, it's fairly simple:
here's a snip from ifconfig
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1524
inet 194.222.196.174 --> 158.152.1.222 netmask 0xffffff00
Now, I can ping the other end of this line at the moment.
(I'm running ppp -alias -auto <myprovider>)
So, I type ifconfig tun0 down, and I can _STILL_ ping the other end of
the line ? really that doesn't make a lot of sense to me.
Either I'm missing something or this is really odd.
Secondly, this machine does name lookups even on local emails, I haven't
got the faintest idea where to try and stop this, as I don't want to have
to hack sendmail.cf
The best hack option so far seems to be to set a dfilter for ppp so that
it won't dial out unless a machine other than the one with the modem is
trying to initialise the connection.
I thought I needed these lines in my config file..
set dfilter 0 deny 194.222.196.174
set dfilter 2000 permit 0/0 0/0
For some reason this doesn't work, I'm not sure why.
This ia basically for an intranet router, which can handle internal and
external mail, but I don't want the connection coming up because person A
sends person B mail internally on the machine.... using PoP though, but
that shouldn't make much difference, even typing this sets of my modem :
root@visnet01# mail root
Subject: hello
test
.
EOT
<---- modem makes connection now ---->
root@visnet01#
I don't want to have to run a DNS here to set this machine as it's mail
exchanger, and this machine shouldn't need a mail exchanger for local
stuff anyway.
I just don't get it anymore =(
--
Steve Roome
Technical Systems Manager, Vision Interactive Ltd.
E: steve@visint.co.uk M: +44 (0) 976 241 342
T: +44 (0) 117 973 0597 F: +44 (0) 117 923 8522
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