Port forwarding wrong after days

[Kay-Michael Voit <kay@voits.net>]

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Hi,
I'm running a small router and firewall at home.
eth0 -> LAN
eth1 -> access point -> WLAN
eth2 -> WAN
On a client im running a donkeyclient, so I had to forward port (it
works without, but then you get a so called "low id" with result in
worse download speed)
I used these rules (now, before the same with another ip):

#eDonkey
      $IPTABLES -t nat -A PREROUTING -p tcp --dport 4661 -i $EXTIF -j DNAT --to 192.168.2.10:4661
      $IPTABLES -t nat -A PREROUTING -p tcp --dport 4662 -i $EXTIF -j DNAT --to 192.168.2.10:4662
      $IPTABLES -t nat -A PREROUTING -p udp --dport 4665 -i $EXTIF -j DNAT --to 192.168.2.10:4665
      $IPTABLES -t nat -A PREROUTING -p udp --dport 4672 -i $EXTIF -j DNAT --to 192.168.2.10:4672
      $IPTABLES -A MYFORWARD -p tcp -d 192.168.2.10 --dport 4661 -i $EXTIF -j ACCEPT
      $IPTABLES -A MYFORWARD -p tcp -d 192.168.2.10 --dport 4662 -i $EXTIF -j ACCEPT
      $IPTABLES -A MYFORWARD -p udp -d 192.168.2.10 --dport 4665 -i $EXTIF -j ACCEPT
      $IPTABLES -A MYFORWARD -p udp -d 192.168.2.10 --dport 4672 -i $EXTIF -j ACCEPT

A few weeks ago I changed the client from LAN to WLAN, and it's IP
changes from 192.168.0.10 to 192.168.2.10. But after days, the LOG
rules in my forward chains still logged connection attempts to
192.168.0.10, and I had a low ID on my WLAN-client.
BTW, there where no rules left, I tried
 iptables -L|grep 192.168.0.10 and
 iptables -t nat -L|grep 192.168.0.10

Then I stopped trying.... But now, without changing anything, it
works. As anyone an explanation for this behavior?



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