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KM (4)

KM
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I wrote a book, maybe you will buy it. Writing CGI Applications with Perl [perlcgi-book.com]

Journal of KM (4)

Thursday July 01, 2004

09:14 AM

OS X and split-tunnel VPN

[ #19623 ]

I connect to a VPN, and sometimes have an issue. When the VPN gets disconnected for some reason (not because I disconnected it), my default gateway route seems to change to something I don't want.

Here is what I have in my /etc/ppp/ip-up:

/sbin/route delete default ip.of.the.vpn /sbin/route add default 192.168.1.1 /sbin/route add XXX.XXX.0.0 ip.of.the.vpn /sbin/route add NN.NNN.0.0/16 ip.of.the.vpn

When I connect, this is fine. All my VPN traffic goes through the VPN, and uses all things VPN. And, when I connect to the rest of the world, it works fine. So, it's a split-tunnel.

And, my ip-down:

/sbin/route add XXX.XXX.0.0 /sbin/route delete NN.NNN.0.0/16 /sbin/route add default 192.168.1.1

When I disconnect by hand, this works fine. I could probably have nothing in this file, but do.

But, those random disconnects (and reconnect) seem to sometimes make my default gateway the ip.of.the.vpn. I don't notice until Adium suddenly disconnects, and I do a netstat to look at the routing table... then I have to run ip-up by hand.

Anyone have any suggestions?

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