Date: Wed, 08 Apr 1998 18:21:20 -0700 From: Arve Ronning <arve.ronning@ah.telia.no> To: freebsd-isdn@FreeBSD.ORG Subject: I4B & NAT Message-ID: <352C2290.6FD4@ah.telia.no>
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Trying to build a router/gateway between my privat Ethernet and
the Internet (via my ISP), I have problems with I4B or NAT (I think:).
The 2.2.5-R kernel with options IPFIREWALL and IPDIVERT works fine
with ISDN4BSD 0.50-alpha and firewall rule 'pass all from any to any'.
However, when I add 'divert natd all from any to any via isppp0'
and start natd, name server lookups to the ISP's NS don't work.
Also, ping and nslookup fails from any other internal host.
So: why doesn't this work ?
(I know, it's probably a screw-up caused by my ignorance:).
Any help would be appreciated.
Any clues in the logs below ?
Thanx for your time,
-Arve
'natd -verbose -interface isppp0' logs:
Ping Gate -> ISP -> Gate, OK
Out [ICMP] 192.193.194.240 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
In [ICMP] 10.0.0.1 -> 192.193.194.240 aliased to
10.0.0.1 -> 192.193.194.240
Nslookup Gate -> ISP -> ??, answer never reaches Gate
Out [UDP] 192.193.194.240 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
Out [UDP] 192.193.194.240 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
Out [UDP] 192.193.194.240 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
Ping Internal -> Gate -> ISP -> Gate, return never reaches Internal
Out [ICMP] 172.16.3.40 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
In [ICMP] 10.0.0.1 -> 192.193.194.240 aliased to
10.0.0.1 -> 192.193.194.240
Out [ICMP] 172.16.3.40 -> 10.0.0.1 aliased to
0.0.0.0 -> 10.0.0.1
In [ICMP] 10.0.0.1 -> 192.193.194.240 aliased to
10.0.0.1 -> 192.193.194.240
ipfw rules and routing tables:
Gate# ipfw list
00100 divert 6668 ip from any to any via isppp0
00200 allow ip from any to any
65535 deny ip from any to any
Gate# netstat -rn
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif Expire
default isppp0 USc 2 0 isppp0
0.0.0.1 default UH 0 0 isppp0
172.16.3/24 link#1 UC 0 0
172.16.3.40 8:0:2b:36:8:9d UHLW 3 2003 ed1 707
127.0.0.1 127.0.0.1 UH 0 0 lo0
Gate# netstat -in
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs
ed1 1500 <Link> 00.00.e8.a0.d4.09 3072 0 2029 0
ed1 1500 172.16.3/24 172.16.3.10 3072 0 2029 0
lp0* 1500 <Link> 0 0 0 0
isppp 1500 <Link> 51 4 79 0
isppp 1500 0/24 192.193.194.240 51 4 79 0
isppp 1500 <Link> 0 0 0 0
isppp 1500 <Link> 0 0 0 0
isppp 1500 <Link> 0 0 0 0
ipr0* 1500 <Link> 0 0 0 0
ipr1* 1500 <Link> 0 0 0 0
ipr2* 1500 <Link> 0 0 0 0
ipr3* 1500 <Link> 0 0 0 0
lo0 16384 <Link> 0 0 0 0
lo0 16384 127 127.0.0.1 0 0 0 0
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