NEWBIE: FreeBSD 4.10 Internet gateway/DNS problem

Tue Jul 13 08:51:29 PDT 2004

I am trying to setup my FreeBSD 4.10 box as an internet gateway for a small
home LAN (2x Win XP and 1x Win 98SE)

The LAN operates without any problems when using the Win 98SE box as a
gateway - all computers can access the internet

I have two nics installed in the FreeBSD box:

	dc0 is the LAN interface via 4-port Linksys hub

	dc1 is the WAN interface via cable modem

I have successfully connected to the internet with dc1

I can ping all other machines on my home LAN with dc0 and vice versa

I cannot access the internet from any machine except the FreeBSD gateway

ifconfig looks like this:

dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::204:5aff:fe76:55f0%dc0 prefixlen 64 scopeid 0x1
        inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
        ether 00:04:5a:76:55:f0
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
dc1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::2a0:ccff:fe33:e1f6%dc1 prefixlen 64 scopeid 0x2
        inet 68.105.58.150 netmask 0xfffffe00 broadcast 68.105.59.255
        ether 00:a0:cc:33:e1:f6
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
lp0: flags=8810<POINTOPOINT,SIMPLEX,MULTICAST> mtu 1500
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x4
        inet 127.0.0.1 netmask 0xff000000
ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
faith0: flags=8002<BROADCAST,MULTICAST> mtu 1500

The contents of /etc/rc.conf are:

hostname="sara.mshome.net"
ifconfig_dc0="inet 192.168.1.1 netmask 255.255.255.0" ifconfig_dc1="DHCP"
<snip> inetd_enable="YES" gateway_enable="YES"

When I try to ping an outside address from a Windows box, I get this
response:

"Ping request could not find host www.freebsd.org. Please check the name and
try again."

When I try to ping a known good URL, I get this response:

Pinging 68.99.63.5 with 32 bytes of data:

Request timed out.

Ping statistics for 68.99.63.5:

    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss)

I have tried setting the DNS servers on the Windows box to the addresses
listed in /etc/resolv.conf:

68.105.161.20
68.1.18.25
68.10.16.30

I have also tried setting the DNS address directly to the default gateway
192.168.1.1 and get the same response.

While searching around in /stand/sysinstall I found the named daemon
enabled.  I disabled with no change (I have since re-enabled it because I
believe that was the default setting when I installed FreeBSD)

FWIW, here's output of netstat -rn on the FreeBSD box:

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            68.105.58.1        UGSc        2        3    dc1
68.105.58/23       link#2             UC          2        0    dc1
68.105.58.1        00:06:2a:cb:7c:54  UHLW        2        0    dc1   1199
68.105.58.150      127.0.0.1          UGHS        0        0    lo0
127.0.0.1          127.0.0.1          UH          2       26    lo0
192.168.1          link#1             UC          1        0    dc0
192.168.1.110      00:08:74:3b:8b:ba  UHLW        0        4    dc0   1081

Internet6:
Destination                       Gateway                       Flags
Netif Expire
::/96                             ::1                           UGRSc
lo0
::1                               ::1                           UH
lo0
::ffff:0.0.0.0/96                 ::1                           UGRSc
lo0
fe80::/10                         ::1                           UGRSc
lo0
fe80::%dc0/64                     link#1                        UC
dc0
fe80::204:5aff:fe76:55f0%dc0      00:04:5a:76:55:f0             UHL
lo0
fe80::%dc1/64                     link#2                        UC
dc1
fe80::2a0:ccff:fe33:e1f6%dc1      00:a0:cc:33:e1:f6             UHL
lo0
fe80::%lo0/64                     fe80::1%lo0                   Uc
lo0
fe80::1%lo0                       link#4                        UHL
lo0
ff01::/32                         ::1                           U
lo0
ff02::/16                         ::1                           UGRS
lo0
ff02::%dc0/32                     link#1                        UC
dc0
ff02::%dc1/32                     link#2                        UC
dc1
ff02::%lo0/32                     ::1                           UC
lo0

And the results of netstat -rn on the Windows box:

Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1   192.168.1.110	  20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1	  1
      192.168.1.0    255.255.255.0    192.168.1.110   192.168.1.110	  20
    192.168.1.110  255.255.255.255        127.0.0.1       127.0.0.1	  20
    192.168.1.255  255.255.255.255    192.168.1.110   192.168.1.110	  20
        224.0.0.0        240.0.0.0    192.168.1.110   192.168.1.110	  20
  255.255.255.255  255.255.255.255    192.168.1.110   192.168.1.110	  1
Default Gateway:       192.168.1.1
===========================================================================
Persistent Routes:
  None

I'm not sure what to do next.  For some reason the Windows cannot access a
name server.  From what I understand from the literature I've been using
(FreeBSD Handbook, Lehey's The Complete FreeBSD, and Anderson's FreeBSD: An
Open-Source etc etc) all that should be needed is set gateway_enable="YES"
in /etc/rc.conf and I've done that.

Google revealed some info on using natd for PPOE, but not sure if that
applies to this problem.

All suggestions/out-right solutions appreciated.

TIA,

Jim C.  