On Monday 14 June 2004 20:49, James Yonan wrote: > Torge Szczepanek <openvpn-de...@szczepanek.de> said: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > Hi! > > > > I am currently trying out OpenVPN 2.0 beta 4 using server mode. > > > > My config on the server looks like this: > > > > dev tun > > mode server > > ifconfig 192.168.100.1 192.168.100.2 > > ifconfig-pool 192.168.100.4 192.168.100.254 > > push "route 192.168.100.1 255.255.255.255" > > route 192.168.100.0 255.255.255.0 > > [...] > > > > Everything works fine as expected. (Which is really great. I appreciate > > the good work done here) > > > > I am wondering why there is a subnet of size /30 assigned to the client. > > I would expect a Point-to-Point device to receive only one ip adress and > > not a /30 subnet. > > This is done for the benefit of OSes (such as Windows) which don't support > true point-to-point tun interfaces. > > The Windows TAP-Win32 driver supports tun interface emulation only. What > that means is that the driver can talk to tun interfaces on other OSes, but > from the perspective of Windows, it sees the tun interface as a virtual > ethernet interface having a subnet mask of 255.255.255.254, containing the > two point-to-point interfaces, a network address, and a broadcast address.
255.255.255.252 (252 == 0xFC == 11111100 binary) -- vda
