On Wednesday 07 February 2018 07:09:59 Michael Stone wrote: > On Wed, Feb 07, 2018 at 10:02:18AM +0200, Michelle Konzack wrote: > >However, the lead to the problem, that I need more then 256 IP > > addresses and since I do not want to install my own Linux router > > behind my 3G Gateway only to have 512 IP adresses or more, I > > decided to increaase the network with 255.255.127.0. and if the IP > > is e.g. 192.168.4.12, then the IP range become automatically > > 192.168.4.0-192.168.5.255. > > As someone already pointed out, this is a bogus netmask. I recommend > > sipcalc as a handy tool for figuring out network information: > > sipcalc 192.168.4.0/23 > > -[ipv4 : 192.168.4.0/23] - 0 > > [CIDR] > Host address - 192.168.4.0 > Host address (decimal) - 3232236544 > Host address (hex) - C0A80400 > Network address - 192.168.4.0 > Network mask - 255.255.254.0 > Network mask (bits) - 23 > Network mask (hex) - FFFFFE00 > Broadcast address - 192.168.5.255 > Cisco wildcard - 0.0.1.255 > Addresses in network - 512 > Network range - 192.168.4.0 - 192.168.5.255 > Usable range - 192.168.4.1 - 192.168.5.254 > > > sipcalc -4 "192.168.4.0 255.255.127.0" > > -[ipv4 : 192.168.4.0 255.255.127.0] - 0 > > -[ERR : Invalid netmask] > > > sipcalc -4 "192.168.4.0 255.255.128.0" > > -[ipv4 : 192.168.4.0 255.255.128.0] - 0 > > [CIDR] > Host address - 192.168.4.0 > Host address (decimal) - 3232236544 > Host address (hex) - C0A80400 > Network address - 192.168.0.0 > Network mask - 255.255.128.0 > Network mask (bits) - 17 > Network mask (hex) - FFFF8000 > Broadcast address - 192.168.127.255 > Cisco wildcard - 0.0.127.255 > Addresses in network - 32768 > Network range - 192.168.0.0 - 192.168.127.255 > Usable range - 192.168.0.1 - 192.168.127.254
Finally, some sanity in this thread, thank you Michael. -- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>
