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List:       openbsd-misc
Subject:    Re: help with nat
From:       "Bruce Bauer" <bruce () specialdevices ! com>
Date:       2001-09-30 18:01:55
[Download RAW message or body]

Why are both network cards on the same subnet?
NAT would accomplish nothing here, even if it did work.

Either you have made a  dumb error and are now smacking yourself in the head or you need to 
educate your self on TCP/IP networks.

> I've read the networking section of the FAQ and there's something I'm just not
> getting.
> 
> *********
> contents of hostname.ne1 which is the internal network card:
> 
> inet 192.168.0.2 255.255.255.0 NONE
> 
> *********
> contents of hostname.ne3 which is the external network card:
> 
> inet 192.168.0.1 255.255.255.0 NONE
> 
> **********
> contents of ipnat.rules:
> 
> # $OpenBSD: ipnat.rules,v 1.2 1999/05/08 16:33:10 jason Exp $
> #
> # See /usr/share/ipf/nat.1 for examples.
> # edit the ipnat= line in /etc/rc.conf to enable Network Address Translation
> 
> 
> map ne3 192.168.0.1/24 -> ne3/32 portmap tcp/udp 10000:60000
> map ne3 192.168.0.1/24 -> ne3/32
> ************
> contents of ipnat -l
> 
> List of active MAP/Redirect filters:
> map ne3 192.168.0.0/24  -> 192.168.0.1/32  portmap tcp/udp 10000:60000
> map ne3 192.168.0.0/24  -> 192.168.0.1/32
> 
> List of active sessions:
> **************
> contents of ifconfig -a:
> 
> lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 32972
>  inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
>  inet6 ::1 prefixlen 128
>  inet 127.0.0.1 netmask 0xff000000
> lo1: flags=8008<LOOPBACK,MULTICAST> mtu 32972
> ne3: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 
1500
>  media: Ethernet autoselect (10baseT)
>  inet6 fe80::5054:ff:feed:744d%ne3 prefixlen 64 scopeid 0x1
>  inet 192.168.0.1 netmask 0xffffff00 broadcast 192.168.0.255
> ne1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 
1500
>  media: Ethernet manual
>  inet 192.168.0.2 netmask 0xffffff00 broadcast 192.168.0.255
>  inet6 fe80::280:adff:fe77:be38%ne1 prefixlen 64 scopeid 0x2
> sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 296
> sl1: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 296
> ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> ppp1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> tun0: flags=11<UP,POINTOPOINT> mtu 1488
>  inet 64.230.103.76 --> 64.230.103.1 netmask 0xff000000
> tun1: flags=10<POINTOPOINT> mtu 3000
> enc0: flags=0<> mtu 1536
> bridge0: flags=0<> mtu 1500
> bridge1: flags=0<> mtu 1500
> gre0: flags=8010<POINTOPOINT,MULTICAST> mtu 1450
> gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> gif1: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> gif2: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> gif3: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
> *************
> contents of route show:
> Routing tables
> 
> Internet:
> Destination      Gateway            Flags
> default          HSE-Hamilton-ppp24 UG
> HSE-Hamilton-ppp 64.230.103.76      UH
> 127.0.0.0        localhost          UG
> localhost        localhost          UH
> 192.168.0.0      link#2             U
> 192.168.0.3      0:0:e8:5a:4e:36    UH
> BASE-ADDRESS.MCA localhost          U
> 
> Internet6:
> Destination      Gateway            Flags
> default          localhost          UG
> default          localhost          UG
> localhost        localhost          UH
> ::127.0.0.0      localhost          UG
> ::224.0.0.0      localhost          UG
> ::255.0.0.0      localhost          UG
> ::ffff:0.0.0.0   localhost          UG
> 2002::           localhost          UG
> 2002:7f00::      localhost          UG
> 2002:e000::      localhost          UG
> 2002:ff00::      localhost          UG
> fe80::           localhost          UG
> fe80::%ne3       link#1             U
> fe80::%ne1       link#2             U
> fe80::%lo0       fe80::1%lo0        U
> fec0::           localhost          UG
> ff01::           localhost          U
> ff02::%ne3       link#1             U
> ff02::%ne1       link#2             U
> ff02::%lo0       fe80::1%lo0        U
> **************
> I can ping 192.168.0.2 with box 192.168.0.3 but I can't ping 192.168.0.1
> 
> Thanks
> 
> Sig
> 

-*-*-*-*-*-*-*-*-*-*-*-*-*-

All opinions are my own.
All advice is worth what you pay for it.
A little experience often upsets a lot of theory.

-*-*-*-*-*-*-*-*-*-*-*-*-*-

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