Apparently, though unproven, at 01:14 on Friday 22 October 2010, Maciej Grela did opine thusly:
> 2010/10/21 Alan McKinnon <alan.mckin...@gmail.com>: > > Hi all, > > > > One gentoo notebook running wicd, three general classes of network logon > > used frequently (dhpc always): > > > > work - mostly wired, occasionally wireless. There's a plethora of APs to > > pick from, some official, some rogue. And not all end up being served by > > the same dhcp server, or even be in sync with each other. > > home - Easy one. Usually wireless, sometimes wired. I control the router. > > everything else - friend's houses, other companies, wifi hotspots. > > > > Thanks to our IT division I get lots of practice in finding interesting > > ways into the corporate network. Depending on how I'm connected I start > > up all manner of tunnels, socks proxies and various other bits. Doing > > this manually is getting tedious. > > > > So I'm looking for a reasonably reliable way of detecting what served my > > current IP address so the post-start script in wicd can detect this and > > launch all the correct things correctly. The actual address range and > > domain is not the way to go - too many networks dish out 10.0.0.0/8 and > > example.com for that to work well. > > > > I have some ideas of my own, but figured I'd ask here as well. Odds are > > excellent someone will have much better ideas than I. > > There are a few metrics you can use to identify a "network" you are on: > > 1. ESSID and AP MAC in case of wireless > 2. MAC address of DHCP server that served you the address (can be also > used to alarm you when DHCP-spoofing is detected). > 3. MAC addresses of hosts provided by DHCP (gateway and DNS usually). > 4. CDP or LLDP traffic on your interface (usually present in corporate > LANs). > > There was once a feature in gentoo, which involved loading different > network profiles from /etc/conf.d/net depending on the IP address of > the gateway offered by DHCP. It worked pretty well in the days before > networkmanager and wicd. Thanks for this, it gives me some ideas to work on further. -- alan dot mckinnon at gmail dot com
