Here's a doozie I've been dealing with. I have had two WRT54GS2 routers hard linked for last 5 years with no problems. A kid wanted to set up a Minecraft server and so I went to access my router config with no luck. First time this has ever happened. But, it only happens when connected to the internet.
I've already reset both routers multiple times and have re-updated firmware. I checked ipconfig and this is where it got interesting. When the routers are disconnected from internet default gateway on my desktop into Router A is 192.168.1.1 and my desktop into Router B is 192.168.1.2 which is what I set them to. However, when connected to the internet the default gateway is midco.net's 24.220.204.1. For reference below is ipconfig. Thanks
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : midco.net
Link-local IPv6 Address . . . . . : fe80::2539:618b:c872: d9cc%10
IPv4 Address. . . . . . . . . . . : 24.220.204.240
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : 24.220.204.1
Tunnel adapter Local Area Connection* 9:
Connection-specific DNS Suffix . : midco.net
IPv6 Address. . . . . . . . . . . : 2002:18dc:ccf0::18dc:ccf0
Default Gateway . . . . . . . . . : 2002:c058:6301::1
2002:c058:6301::c058:6301
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:34fe:6:e723:330f
Link-local IPv6 Address . . . . . : fe80::34fe:6:e723:330f%13
Default Gateway . . . . . . . . . :
Tunnel adapter isatap.midco.net:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : midco.net
I've already reset both routers multiple times and have re-updated firmware. I checked ipconfig and this is where it got interesting. When the routers are disconnected from internet default gateway on my desktop into Router A is 192.168.1.1 and my desktop into Router B is 192.168.1.2 which is what I set them to. However, when connected to the internet the default gateway is midco.net's 24.220.204.1. For reference below is ipconfig. Thanks
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : midco.net
Link-local IPv6 Address . . . . . : fe80::2539:618b:c872: d9cc%10
IPv4 Address. . . . . . . . . . . : 24.220.204.240
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : 24.220.204.1
Tunnel adapter Local Area Connection* 9:
Connection-specific DNS Suffix . : midco.net
IPv6 Address. . . . . . . . . . . : 2002:18dc:ccf0::18dc:ccf0
Default Gateway . . . . . . . . . : 2002:c058:6301::1
2002:c058:6301::c058:6301
Tunnel adapter Teredo Tunneling Pseudo-Interface:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2001:0:9d38:953c:34fe:6:e723:330f
Link-local IPv6 Address . . . . . : fe80::34fe:6:e723:330f%13
Default Gateway . . . . . . . . . :
Tunnel adapter isatap.midco.net:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : midco.net