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Re: [K12OSN] How do you block DHCP requests from the clients from being forwarded onto your external interface



On Wednesday 25 October 2006 11:23, marrandy wrote:
> Hello.
>
> 1)   How do you block DHCP requests from the clients from being forwarded
> onto your external interface ?
>

First, broadcasts should never be propagated beyond the LAN they originated on 
(that is the standard IP protocol and dhcp behavior).  Second, in most cases 
the LTSP server with two interfaces doesn't usually require that packet 
forwarding be turned on at all (that is no packets get forwarded from 
"inside" to "outside" interfaces at all), that is the difference between a 
dual-homed host and a router. If your interfaces are on the same LAN, then 
disregard this.

Assuming your interfaces are on different LANs, what makes you believe that 
dhcp broadcasts are being forwarded? My guess is that you are seeing 
broadcast dhcp requests from the "other LAN" that your external inteface is 
on and not from your X terminals on the "inside" LAN.

>
> 2) The GUI firewall control leaves a lot to be desired.  Is there anything
> better ?
>

That depends on what you mean by "better"? You could always use the command 
line if you need more functionality. What is it you desire?


-- 
        "History doesn't repeat itself; at best it rhymes."
                        - Mark Twain

| John Lucas                          MrJohnLucas gmail com               |
| St. Thomas, VI 00802                http://mrjohnlucas.googlepages.com/ |
| 18.3°N, 65°W                        AST (UTC-4)                         |


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