newbie question about iptables syntax

[thecourtjester]

ok guys, im hoping you can help me out here, im a bit new, i have toyed with linux for about 5 months now,

.... im working on a firewall for a gateway, and im tryiing to forward all traffic into one ip address. ...obviously. however, other than a few examples of specific attempts at others individual quests, im finding no examples or help in the area. I've gone to quite a few tutorial sites, but no luck .... i'm using Redhat 9 and i've checke d the help manual./nope. i admit that i am relatively new at this, so im sure there are som untapped resources out there somewhere, but for now im just spinning my wheels. I need a reference for iptables syntax.
-any help i can get with the would be great ...
thanks
Jester

[jasonlambert]

If you dont mind paying for a decent book, i would strongly recommend "Red Hat Linux FireWalls", by Bill McCarty. It is published by Redhat Press /wiley, RRP is £37.50, or $50.00 USA. ISBN is 0-7645-2463-1.

I purchased the book last year, it covers IPTables, Chains, creating your own firewall scripts, and the usual "understanding TCP/IP" that seems to be in just about every book I read Also includes some neat logging tricks, and loads of other stuff.

Well worth the money IMO.

Jason

[thecourtjester]

thanks man, i'll give it a try, i think i might konw someone with that book. im stuck at the moment, so i have not much to loose.
later

Jester

[thecourtjester]

ok ,well the book seems out of reach for now, but here is a more specific problem. i need to know what the syntax is for an ip from anywhere. like -d (anywhere)

[jasonlambert]

using "255.255.255.255" might work.

255 is the broadcast address, and means anything in that subnet/octet. therefore, 255.255.255.255 means any IP.

Jason