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netbsd-5 and NFS-booted ipfilter firewall


On netbsd-5, my firewall hangs after installing NAT rules for ipfilter. The firewall is netbooted. Turn ipfilter off and the machine boots without interruption. Revert to netbsd-4 and everything works properly.

After reading a few threads that seem similar, I experimented with setting nfsd to run udp-only, but that didn't help.

Below is part of the boot messages. I'll try pf (again) but haven't had much luck in the past. Any help would be great,


nfs_boot: trying DHCP/BOOTP
nfs_boot: DHCP next-server:
nfs_boot: my_addr=
nfs_boot: my_mask=
nfs_boot: gateway=
root on
root file system type: nfs
Sun Feb 22 05:42:32 UTC 2009
Starting file system checks:
Setting tty flags.
Enabling ipfilter.
Setting sysctl variables:
net.inet.ip.forwarding: 0 -> 1
Starting network.
Hostname: xx.xx.xx
IPv6 mode: host
Configuring network interfaces: sip0 sip2.
Adding interface aliases:.
add net default: gateway xx.xx.xx.xx
Building databases: dev, utmp, utmpx done
Starting syslogd.
Installing NAT rules ... 0 entries flushed from NAT table
nfs server not responding
Feb 22 05:43:21 isis /netbsd: nfs server not responding

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