Today I've started experiencing issues with my watchguard XTM 515 issuing IP addresses to devices from the Watchguard DHCP.
Scenario is: We have a second subnet on our network which I use for mobile devices and guest/visitor laptops to use WIFI. We call this simply "Visitors WIFI". This has no route onto our existing LAN and just keeps the connections separate but running off the same internet connection via our WG XTM.
At the time of creating this, for simplistic reasons, I decided not to use our normal DHCP servers and just use our Watchguard Firewall's DHCP for requests onto the "Visitors WIFI".
This has been working fine for the past 2 years but suddenly today it has decided to have a hissy fit and not work.. At first I thought the DHCP pool could be full, turns out it's not. I decided to release all the IP addresses anyway, which didn't do anything.
When I connect to the WIFI i'm getting a request but it just seems to drop it instantly. Here's a log of 2 devices trying to connect.
2014-04-04 09:00:21 dhcpd DHCPDISCOVER from 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0066" Event
2014-04-04 09:00:22 dhcpd DHCPOFFER on 172.16.0.52 to 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0065" Event
2014-04-04 09:00:26 dhcpd DHCPDISCOVER from 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0066" Event
2014-04-04 09:00:26 dhcpd DHCPOFFER on 172.16.0.52 to 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0065" Event
2014-04-04 09:00:27 dhcpd DHCPDISCOVER from 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0066" Event
2014-04-04 09:00:28 dhcpd DHCPOFFER on 172.16.0.53 to 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0065" Event
2014-04-04 09:00:30 dhcpd DHCPDISCOVER from 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0066" Event
2014-04-04 09:00:30 dhcpd DHCPOFFER on 172.16.0.52 to 54:79:75:3e:b7:94 (Windows-Phone) via eth5 id="1600-0065" Event
2014-04-04 09:00:30 dhcpd DHCPDISCOVER from 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0066" Event
2014-04-04 09:00:30 dhcpd DHCPOFFER on 172.16.0.53 to 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0065" Event
2014-04-04 09:00:33 dhcpd DHCPDISCOVER from 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0066" Event
2014-04-04 09:00:33 dhcpd DHCPOFFER on 172.16.0.53 to 48:9d:24:74:d7:92 (BLACKBERRY-486B) via eth5 id="1600-0065" Event
Any idea's on what's going wrong here?