I'm facing some troubles right now with an OpenVPN server an former colleague set up (I'm not too into it ATM). We're using OpenVPN for a private network of ~200 clients (to be more specific, only 15 clients, with VMs on them, bridged to the same network, 192.168.1.0/24).
It worked nicely for years, but for some weeks, it's acting strange. I have a laptop in this network, which used to have IP 192.168.1.156. Here the interesting part of my OpenVPN server configuration:
ifconfig-pool-persist ipp.txt ifconfig-pool 192.168.1.1 192.168.1.254 255.255.255.0
And in my ipp.txt file:
But when I restart my openvpn client, I got another IP, always different. Of course, it allocate me an IP already used by another OpenVPN client, which is insane! Here is the log of my client:
Wed Feb 6 12:36:29 2013 SENT CONTROL [xxx]: 'PUSH_REQUEST' (status=1) Wed Feb 6 12:36:29 2013 PUSH: Received control message: 'PUSH_REPLY,dhcp-option DNS 192.168.1.5,ping 8,ping-restart 20,ifconfig 192.168.1.24 255.255.255.0' Wed Feb 6 12:36:29 2013 OPTIONS IMPORT: timers and/or timeouts modified Wed Feb 6 12:36:29 2013 OPTIONS IMPORT: --ifconfig/up options modified Wed Feb 6 12:36:29 2013 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Wed Feb 6 12:36:29 2013 TUN/TAP device tap0 opened Wed Feb 6 12:36:29 2013 TUN/TAP TX queue length set to 100 Wed Feb 6 12:36:29 2013 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Wed Feb 6 12:36:29 2013 /sbin/ifconfig tap0 192.168.1.24 netmask 255.255.255.0 mtu 1500 broadcast 192.168.1.255
So here I got 192.168.1.24 instead of .156. It happens to every of my hosts, but fortunately they have a private IP in interfaces file, in static, so they're kind of unallowed to modify the ip with "ifconfig" command, like it happens to me.
Can anybody point me out a way to investigate?
Thanks a lot in advance!