Hello Brian, Am 2018-02-07 hackte Brian in die Tasten: > On Wed 07 Feb 2018 at 13:42:04 +1300, Richard Hector wrote: >> The netmask line is an alternative to that. You need to tell it >> _somehow_ how big the subnet is. > > As a changelog from May 2012 says: > > * Calculate netmask internally, so even if a user haven't supplied > one or have used CIDR notation, hook scripts will have it properly > specified in IF_NETMASK environment variable.
Thats true, but this is only for a standard config using e.g. 192.168.0.0 10.0.0.0 networks. Since Media Converter (Ethernet-Fiber) cost only arround 65 I decided to cable my whole BioFarm with arround 2500m to connect all my sensors to the grid. And no, Wifi is no option, because there are criminals using Wifi Jammer and then the WHOLE network is for the ass. 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. Without Netmask it can not be guessed by any systems, that you have more then 256 IP addresses. Have a nice day -- Michelle Konzack Miila ITSystems @ TDnet GNU/Linux Developer 00372-54541400
