[ not directly a LARTC question ] IP network = CIDR network address IP network is the network address. See description of terms here: http://linux-ip.net/html/routing-intro.html http://linux-ip.net/html/routing-intro.html#list-routing-intro-ipdefs-netaddr One possible value for your P1_NET is 200.158.130.128/29, if your netmask is 255.255.255.248. Good luck, -Martin : Hi all, : : I´m new to this list. : : In section 4.2.1 I read "Finally, let $P1_NET be the IP network of $P1" : : $P1 is 200.158.130.129, my provider gateway.. I simply don´t understand what : is the "IP Network"... : : the netmask? : : please help... thks : : : : _______________________________________________ : LARTC mailing list / LARTC@xxxxxxxxxxxxxxx : http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ : -- Martin A. Brown --- SecurePipe, Inc. --- mabrown@xxxxxxxxxxxxxx