Quote:
Originally Posted by edhunter
does your isp provides you only with 20ips from same network, or you have additional ip only for your freebsd router to connect to your isp gateway ?
i am asking because i have similar situation - from the isp I have 16ips (mask /16), but i have additional ip for connecting to his gw...
write me if you need see how i did it in my case
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Not to nitpick, but the way you are describing your subnet is not correct- 16 addresses is a /28 (255.255.255.240 subnetmask)
/16 is actually 256 Class C blocks- aka a Class B.
I make mention of this because a few years back a client I consulted for decided to make this same reference to his ISP and BGP peer session. The ISP didn't vet this properly, propagated the erroneous /16, and as a result blackholed Microsoft for a short period of time (probably not a bad thing in hindsight lol.) It really highlighted the client's naivete... as you wouldn't announce anything smaller than a /24 over BGP in the first place, but that's another story.
When in doubt about subnetting and CIDR,
Wikipedia has a decent reference.