Hi all,

strange problem with my firewall i can't figure out:
- NetBSD 1.5.2 (FIREWALL)
- cpu0: Intel 486DX2 (486-class)
- total memory = 32384 KB
- avail memory = 26244 KB
...
- le0 at pci0 dev 18 function 0: PCnet-PCI Ethernet
- le0: address 00:00:f4:c4:42:99
- le0: 8 receive buffers, 2 transmit buffers
- le0: interrupting at irq 9
...
- isa0 at mainbus0
- ep0 at isa0 port 0x280-0x28f irq 10: 3Com 3C509 Ethernet
- ep0: address 00:20:af:46:b3:44, 8KB byte-wide FIFO, 5:3 Rx:Tx split
- ep0: 10base5, 10base2 (default 10base2)
 
With ipfilter and nat enabled and an adsl-line with pppoe.
2 workstations (w2k and hpux) behind my fw accessing the internet 
without any problems.

Once in a while the adsl connection gets lost (problems with the adsl 
line or the provider!?) and is then reconnected automatically (good :-).

But after reconnection something is wrong:
The fw can ping the internet, my 2 ws can not! The lan connection 
between fw and ws is still ok.
This problem is solved after reboot of the fw (not a good solution :-(

When this occurs, dmesg tells about the pppoe interface (allied telesyn2450)
- le0: lost carrier
- le0: lost carrier
- le0: device timeout

So the first time i replaced the interface with an identical one. ..but 
same behaviour.
The logfile shows:
- 22:00:14 firewall adsl-connect: ADSL connection lost; attempting 
re-connection.
- 22:00:19 firewall pppd[641]: pppd 2.4.0 started by root, uid 0
- 22:00:19 firewall pppd[641]: Using interface ppp0
- 22:00:19 firewall pppd[641]: Connect: ppp0 <--> /dev/ttyp0
- 22:00:19 firewall pppoe[644]: Interface=le0 HWaddr=00:00:F4:C4:42:99 
Device=/dev/bpf0 Buffer size=8192
- 22:00:50 firewall pppd[641]: LCP: timeout sending Config-Requests
- 22:00:50 firewall pppd[641]: Connection terminated.
- 22:01:14 firewall pppoe[644]: Timeout waiting for PADS packets
- 22:01:14 firewall pppd[641]: Exit.
- 22:01:14 firewall adsl-connect: ADSL connection lost; attempting 
re-connection.
- 22:01:19 firewall pppd[660]: pppd 2.4.0 started by root, uid 0
- 22:01:19 firewall pppd[660]: Using interface ppp0
- 22:01:19 firewall pppd[660]: Connect: ppp0 <--> /dev/ttyp0
- 22:01:19 firewall pppoe[663]: Interface=le0 HWaddr=00:00:F4:C4:42:99 
Device=/dev/bpf0 Buffer size=8192
- 22:01:30 firewall pppoe[663]: PPP session is 6384
- 22:01:30 firewall pppd[660]: local  IP address 80.142.214.201
-22:01:30 firewall pppd[660]: remote IP address 217.6.88.43

Restarting ipfilter or ipnat manually doesn't work.
Is there anything i'm missing or doing wrong?

Ciao

Sal