Connect to Internet

Kevin D. Kinsey, DaleCo, S.P. kdk at
Wed Apr 7 14:08:19 PDT 2004

Remko Lodder wrote:

> RazorOnFreeBSD wrote:
>> Hello,
>> I just setup a freebsd box with the 5.1 release to be a 
>> gateway/firewall.
>> The installation was smooth and to setup the gateway/firewall with 
>> nat a lot
>> of sources are available on Internet.
>> Here is my problem, I can't connect to Internet from the Freebsd box.
>> I have DSL and my ISP is AT&T, I have a static IP wich means I don't 
>> need to run PPP to connect.
>> FreeBSD Internet NIC is : 12.103.20.x
>> When I type ifconfig my NIC looks fine, up and running :
>> rl0 : 12.103.20.x
>> For information the freebsd box contains 2 NIC's one for Internet
>> the other for the LAN (
>> If I ping myself no problem everything's fine, but I can't ping a web
>> address. I don't know if it is possible under unix but I use to
>> "ping" for example to know if it's well
>> connected. But the best proof is when I try to install samba
>> my freebsd gives a time out reaching the samba server on the web....
> Do you have dns servers listed in /etc/resolv.conf?
> nameserver <nameserver>
> nameserver <nameserver>
> arp -n -a , does that mention the router's ip and mac addres?
> Try it (:

What's the default route?  TCP/IP requires (amongst other things)
an address and a default route.  Here's one of mine:

    % netstat -rn
        Routing tables

        Destination        Gateway            Flags    Refs      Use  
Netif Expire
        default                UGS         0    
17570   xl0

Probably your second action, after pinging localhost and your
local IP but before pinging Yahoo, should be a ping off the
"next-hop" gateway.  Your ISP should have told you this, and
it should probably be in /etc/rc.conf as "defaultrouter"...

Or, try traceroute(1) with some address (
will get you Yahoo!) and see what happens.

If you get a "no route to host" or similar, it's your IP
configuration; if it's "unknown host", it's
your name resolution, as Remko was pointing out.

If you have an IP addy but no gw, then you need to
run, as root:

    #route add default


Kevin Kinsey
DaleCo, S.P.

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