> I have recently installed Comcast Business Internet including a block of
> 5 static IPs (xxx.xxx.xxx.232/29). Comcast configures the default
> gateway as xxx.xxx.xxx.238. I have configured the OpenWRT as
> xxx.xxx.xxx.237 (and aliased as 192.168.1.1).
> I have the connection working through the default gateway BUT am
> confused as to the best approach to handling/routing the other static IPs.
If I'm understanding this correctly, it sounds like comcast are
supplying a LAN with the various "real" legacy IP addresses and their
own gatewaying-router already, you don't as such need any router.
You may need a switch to connect more ethernet sockets, however.
Can you, for example, configure an internet server computer with
a static IPv4 address attached to the 'outside' lan as well as
your router, for example using one of the 4 other IPv4 addresses:-
xxx.xxx.xxx.233 xxx.xxx.xxx.234 xxx.xxx.xxx.235 xxx.xxx.xxx.236
?
Now, it IS possible ALSO to, conceptually take 2 other approaches:-
* Configure some of those other 4 IPv4 addresses directly on the
OpenWRT-router (Alias addresses on the wan interface)
[you might be able to do that on the web-interface,
apologies I don't have one with the web installed
to check...?]
* Setup portforwarding etc. using those 'additional addresses'
for addional servers through those extra DNAT rules.
[as you originally suggested in your email.].
AND, it is possible (more difficult) to:-
* Setup OpenWRT as a proxy-arp-router, with its' WAN and LAN set to the
same IPv4 address range, essentially
* [this introduces complications but can be useful in some circumstances
you want firewalling along with keeping the real-IPv4-address-
range].
--Simon
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