I've got a DIR 615 Hx. I've started with fw v8.02 and now i'm at v8.05, but i've always had this problem.
The problem comes and goes everyday which is weird.
The router log looks something like this:
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Apr 12 11:18:38 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 11:18:38 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 11:18:38 [SYSTEM]: IPv6, Link Local mode
Apr 12 11:18:37 [SYSTEM]: DNS, start DNS Proxy
Apr 12 11:18:36 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 11:18:36 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 11:18:35 [SYSTEM]: NET, start Firewall
Apr 12 11:18:35 [SYSTEM]: NET, start NAT
Apr 12 11:18:35 [SYSTEM]: NET, stop Firewall
Apr 12 11:18:35 [SYSTEM]: NET, stop NAT
Apr 12 11:18:35 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 11:18:32 [SYSTEM]: WAN, start Static IP mode
Apr 12 11:18:32 [SYSTEM]: WAN, stop Static IP mode
Apr 12 11:18:32 [SYSTEM]: WAN, stop Static IP mode
Apr 12 11:18:29 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 11:18:29 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 11:18:29 [SYSTEM]: IPv6, Link Local mode
Apr 12 11:18:29 [SYSTEM]: DNS, start DNS Proxy
Apr 12 11:18:27 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 11:18:27 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 11:18:27 [SYSTEM]: NET, start Firewall
Apr 12 11:18:27 [SYSTEM]: NET, start NAT
Apr 12 11:18:27 [SYSTEM]: NET, stop Firewall
Apr 12 11:18:27 [SYSTEM]: NET, stop NAT
Apr 12 11:18:27 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 11:18:23 [SYSTEM]: WAN, start Static IP mode
Apr 12 11:18:23 [SYSTEM]: WAN, stop Static IP mode
Apr 12 11:18:23 [SYSTEM]: WAN, stop Static IP mode
Apr 12 11:11:27 [SYSTEM]: SCHEDULE, Wireless Radio On
Apr 12 11:11:27 [SYSTEM]: NTP, Local time=2014/04/12 11:11:27
Apr 12 11:11:27 [SYSTEM]: NTP, Daylight saving status: Disable
Apr 12 11:11:27 [SYSTEM]: NTP, Time zone = +1.0 Sarajevo, Sofija, Warsaw, Zagreb, Skopje, Vilnius
Apr 12 10:53:25 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:53:25 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:53:25 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:53:25 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:53:24 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:53:23 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:53:23 [SYSTEM]: NET, start Firewall
Apr 12 10:53:22 [SYSTEM]: NET, start NAT
Apr 12 10:53:22 [SYSTEM]: NET, stop Firewall
Apr 12 10:53:22 [SYSTEM]: NET, stop NAT
Apr 12 10:53:22 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:53:19 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:53:19 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:53:19 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:52:04 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:52:04 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:52:04 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:52:04 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:52:03 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:52:03 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:52:02 [SYSTEM]: NET, start Firewall
Apr 12 10:52:02 [SYSTEM]: NET, start NAT
Apr 12 10:52:02 [SYSTEM]: NET, stop Firewall
Apr 12 10:52:02 [SYSTEM]: NET, stop NAT
Apr 12 10:52:02 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:51:59 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:51:59 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:51:59 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:51:55 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:51:55 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:51:55 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:51:55 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:51:54 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:51:54 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:51:53 [SYSTEM]: NET, start Firewall
Apr 12 10:51:53 [SYSTEM]: NET, start NAT
Apr 12 10:51:53 [SYSTEM]: NET, stop Firewall
Apr 12 10:51:53 [SYSTEM]: NET, stop NAT
Apr 12 10:51:53 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:51:50 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:51:50 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:51:50 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:45:47 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:45:47 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:45:47 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:45:46 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:45:45 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:45:45 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:45:44 [SYSTEM]: NET, start Firewall
Apr 12 10:45:44 [SYSTEM]: NET, start NAT
Apr 12 10:45:44 [SYSTEM]: NET, stop Firewall
Apr 12 10:45:44 [SYSTEM]: NET, stop NAT
Apr 12 10:45:44 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:45:41 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:45:41 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:45:41 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:45:20 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:45:20 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:45:20 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:45:20 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:45:18 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:45:18 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:45:18 [SYSTEM]: NET, start Firewall
Apr 12 10:45:18 [SYSTEM]: NET, start NAT
Apr 12 10:45:17 [SYSTEM]: NET, stop Firewall
Apr 12 10:45:17 [SYSTEM]: NET, stop NAT
Apr 12 10:45:17 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:45:14 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:45:14 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:45:14 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:42:56 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:42:56 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:42:56 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:42:56 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:42:55 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:42:55 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:42:54 [SYSTEM]: NET, start Firewall
Apr 12 10:42:54 [SYSTEM]: NET, start NAT
Apr 12 10:42:54 [SYSTEM]: NET, stop Firewall
Apr 12 10:42:54 [SYSTEM]: NET, stop NAT
Apr 12 10:42:54 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:42:51 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:42:51 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:42:51 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:42:48 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:42:48 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:42:48 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:42:47 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:42:46 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:42:46 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:42:45 [SYSTEM]: NET, start Firewall
Apr 12 10:42:45 [SYSTEM]: NET, start NAT
Apr 12 10:42:45 [SYSTEM]: NET, stop Firewall
Apr 12 10:42:45 [SYSTEM]: NET, stop NAT
Apr 12 10:42:45 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:42:42 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:42:42 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:42:42 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:38:24 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:38:24 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:38:24 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:38:18 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:38:16 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:38:16 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:38:15 [SYSTEM]: NET, start Firewall
Apr 12 10:38:15 [SYSTEM]: NET, start NAT
Apr 12 10:38:15 [SYSTEM]: NET, stop Firewall
Apr 12 10:38:15 [SYSTEM]: NET, stop NAT
Apr 12 10:38:15 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:38:12 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:38:12 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:38:12 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:36:51 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:36:51 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:36:51 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:36:45 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:36:44 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:36:44 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:36:43 [SYSTEM]: NET, start Firewall
Apr 12 10:36:43 [SYSTEM]: NET, start NAT
Apr 12 10:36:43 [SYSTEM]: NET, stop Firewall
Apr 12 10:36:43 [SYSTEM]: NET, stop NAT
Apr 12 10:36:43 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:36:40 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:36:40 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:36:40 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:30:13 [SYSTEM]: QoS, Stopping
Apr 12 10:30:12 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:30:12 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:30:12 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:30:06 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:30:05 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:30:05 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:30:04 [SYSTEM]: NET, start Firewall
Apr 12 10:30:04 [SYSTEM]: NET, start NAT
Apr 12 10:30:04 [SYSTEM]: NET, stop Firewall
Apr 12 10:30:04 [SYSTEM]: NET, stop NAT
Apr 12 10:30:04 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:30:01 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:30:01 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:30:01 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:29:10 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:29:10 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:29:10 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:29:09 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:29:08 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:29:08 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:29:07 [SYSTEM]: NET, start Firewall
Apr 12 10:29:07 [SYSTEM]: NET, start NAT
Apr 12 10:29:07 [SYSTEM]: NET, stop Firewall
Apr 12 10:29:07 [SYSTEM]: NET, stop NAT
Apr 12 10:29:07 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:29:04 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:29:04 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:29:04 [SYSTEM]: WAN, stop Static IP mode
Apr 12 10:29:01 [SYSTEM]: QoS, Stopping
Apr 12 10:29:01 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:29:01 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:29:01 [SYSTEM]: IPv6, Link Local mode
Apr 12 10:29:01 [SYSTEM]: DNS, start DNS Proxy
Apr 12 10:28:59 [SYSTEM]: NET, start IPv6 Firewall
Apr 12 10:28:59 [SYSTEM]: NET, stop IPv6 Firewall
Apr 12 10:28:58 [SYSTEM]: NET, start Firewall
Apr 12 10:28:58 [SYSTEM]: NET, start NAT
Apr 12 10:28:58 [SYSTEM]: NET, stop Firewall
Apr 12 10:28:58 [SYSTEM]: NET, stop NAT
Apr 12 10:28:58 [SYSTEM]: WAN, IP address=192.168.121.53
Apr 12 10:28:55 [SYSTEM]: WAN, start Static IP mode
Apr 12 10:28:55 [SYSTEM]: WAN, stop Static IP mode
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My ISP has DHCP but i've put a static IP in the router as the the ISP has fixed my IP (i'm always getting the same IP from the DHCP server) and if i use Dynamic IP in the router it does the same thing as seen in the log, just that the timeouts are much bigger (up to 100s for everytime the WAN stops/starts the IP mode)
I hope i made sense in describing the problem.
Thank you!