ppp with dynamic IPs and ipfw "me"

Oliver Fromme olli at lurza.secnetix.de
Thu Jun 17 09:38:23 GMT 2004

Martin <nakal at web.de> wrote:
 > Sometimes, I get disconnected with my DSL router and ppp
 > reconnects me in background. This is correct so far, but
 > I also get a new (dynamic) IP and it seems that ipfw
 > does not forget my old IP.
 > I noticed this behavior with the rules which restrict
 > the communication to the ntpd-port 123.

I'm not sure if this is related to your problem, but you
have to kill and restart ntpd every time you get a new IP.
That's because ntpd binds to every IP address it finds upon
startup explicitely, not just to "*".

You can do that automatically with a ppp.linkup script.


Oliver Fromme, secnetix GmbH & Co KG, Oettingenstr. 2, 80538 München
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and may not necessarily reflect the opinions of secnetix in any way.

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