Gateway with one NIC / dhcp problems

["Kelvin" <kayledge@yahoo.com.sg>]

Hi,However there is a 3COM network card in the box. Since most of the time,
a gateway has two NIC
cards. one connected to the internet and the other to LAN, I'm wondering
if it'l  be possible to setup this box as my gateway.
I've got a hub. So I'm thinking:

cablemodem -> hub -> obsd box (with only ONE nic) -> same hub -> LAN

obviously, ive only got one IP. and pls do not advise me to get a router -
too expensive :<

>From the Obsd FAQ:
IP Network Address Translation will work on machines with only one NIC,
however since packets will be going in and out of the same interface,
ethernet collisions will slow down performance considerably.


2)
another problem cropped up. ISP uses dhcp.
And I have a 3com NIC on the box
snip dmesg output:
ep0 at isa0 port 0x300/16 irq 10: address 00:a0:24:45:57:ed, utp (default
utp)
...
ep1 at isapnp0 "3Com 3C509B EtherLink III, TCM5095, PNP80F7, " port 0x210/16
irq 5: address 00:a0:24:45:57:ed, utp (default utp)

ep0 and ep1 were also detected during install.
however during network installation. only ep1 managed to receive dhcp
configuration from isp.
ep0 only spewed out some nonsense which i cant rememeber

anyhow, i boot up. and following the FAQ, i did echo dhcp > hostname.ep1
restarted. but dhcp still gave alot of errors. i.e still no internet
so i tried echo dhcp > hostname.ep0 .. also failed.
since during installation i managed to get a valid ip and connect to ftp to
download the installation files. surely, it cant be a network problem?

until i get the second NIC, i'l not setup NAT. so my sole purpose now is to
get the box up and running on the internet.

Heres a snip of ifconfig -a output:

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
ep0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
media: Ethernet 10baseT
inet6 fe80::2a0:24ff:fe45:57ed%ep0 prefixlen 64 scopeid 0x1
inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
ep1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
media: Ethernet 10baseT
inet6 fe80::2a0:24ff:fe45:57ed%ep1 prefixlen 64 scopeid 0x2
inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255


Advice/Suggestions?
Thanx in advance

-kay


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