Wireshark · Ethereal-users: [ethereal-users] can't open an interface without IPv4 address assigned

["Eichert, Diana" <deicher@xxxxxxxxxx>]

Hello

	I CVS's current today to an OpenBSD i386 system that I use as a
filtering bridge.  The interface to the outside has no IPv4 address assigned
to it.  In fact on most OpenBSD filtering bridges you usually don't have an
IP address assigned to an interface that is part of the network you are
filtering.

	The bridge is operating properly.

I received the following error:

tethereal: Can't use filter:  Couldn't obtain netmask info (dc0: no IPv4
address assigned).

dc0 is operating as part of the bridge as show below:

bridge0: flags=41<UP,RUNNING>
	Interfaces:
		dc3 flags=7<LEARNING,DISCOVER,BLOCKNONIP>
		dc0 flags=7<LEARNING,DISCOVER,BLOCKNONIP>

Here is a listing of interfaces on the system:

lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 32972
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7
	inet6 ::1 prefixlen 128
	inet 127.0.0.1 netmask 0xff000000 
dc0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	media: Ethernet 100baseTX full-duplex
	status: active
	inet6 fe80::280:c8ff:fec9:1e64%dc0 prefixlen 64 scopeid 0x1
dc1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	media: Ethernet autoselect (none)
	status: no carrier
dc2: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
	media: Ethernet autoselect (none)
	status: no carrier
dc3: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
	media: Ethernet 100baseTX full-duplex
	status: active
	inet 134.253.154.228 netmask 0xffffff00 broadcast 134.253.154.255
	inet6 fe80::280:c8ff:fec9:1e67%dc3 prefixlen 64 scopeid 0x4

thanks

diana

diana eichert
network systems analyst
org 9314
sandia national laboratories
soccer, softball and volleyball player
(computer nerds need exercise too!)
albuquerque, nm