Frustrating issue - Weird IP address

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MorneDJ
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Joined: 11 Dec 2009, 12:02
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Frustrating issue - Weird IP address

Post by MorneDJ »

I have this weird issue that is causing alot of stress in my life. We are a small company that have 9 PC's connected on a LAN. All the PC's connect to a central 48-port switch (unmanaged Cisco or something, but a good quality switch).

I use the 192.168.0.1 - 192.168.0.254 IP addresses.

My PC is 192.168.0.1, with the next PC being ...2 etc. We generally all run Windows 7, though the newest PC's come with Windows 8.1 pre-installed.
I have allocated 192.168.0.150 - 192.168.0.200 as the DHCP addresses. These are assigned by a Cisco linksys router that is also the internet gateway. The address is 192.168.0.254 and all the other PC's use this gateway.

192.168.0.210 is our main file server, running Ubuntu Linux. No DHCP server component installed.
192.168.0.211 is a backup file server, running Ubuntu Linux. No DHCP server component installed.

192.168.0.246 is a HP CM4730 printer.
192.168.0.247 is a Panasonic DPC 354 printer.
192.168.0.248 is a Panasonic DPC 354 printer (yeah, we print alot at times)

192.168.0.251 is a second backup ADSL router. DHCP is disabled.
192.168.0.253 is our wireless router, an Asus RT-AC68U running DD-WRT. DHCP is disabled. Lets call this My_Gateway.
192.168.0.254 is our internet gateway and DHCP server.

But at times people (wired or not) connects to a weird outside address. Naturally they cannot connect to the local file server (and cannot work) though they have internet. This is normally whether I specify a local IP address or not. Lots of checking the IP and restarting seems to resolve the problem, but a significant cost of time.

I just bought two laptops yesterday, and it connected the the LAN no problem using the wireless (one have a specified IP and the other uses DHCP) cards. Yet, this morning none can connect to the local file server. Both connects to "My_Gateway". After some restarting and alot of swearing the one using DHCP connects to the file server. The other one refuses and still connect to the weird IP. Output from ipconfig is as follows:

Code: Select all

Windows IP Configuration


Wireless LAN adapter Local Area Connection* 4:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

Wireless LAN adapter Local Area Connection* 3:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 

Wireless LAN adapter Wi-Fi:

   Connection-specific DNS Suffix  . : 
   IPv6 Address. . . . . . . . . . . : fd41:a618:5e46:1:7cc9:d044:9fc3:4168
   Temporary IPv6 Address. . . . . . : fd41:a618:5e46:1:6c6b:80d9:719e:832e
   Link-local IPv6 Address . . . . . : fe80::7cc9:d044:9fc3:4168%6
   Autoconfiguration IPv4 Address. . : 169.254.65.104
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . : 192.168.0.254

Ethernet adapter Ethernet:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : C2-WDS66.COM

Tunnel adapter isatap.{870EBCE6-7AC0-461A-B626-70ABE9D07546}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : 
This is very weird as this laptop have the fixed address of 192.168.0.3 (Believe me, not going to post a screenshot). This has been screwing around with me for a few months, but now I need to resolve it. I guess that it is because there is some adaptor connected to the internet that also assign direct IP's as if the PC is connected directly to the internet. But, I have checked every PC, every setting, yet cannot find the mofo.

Can anyone help me. This can be via open post, telephone, email, PM or even a visit to our office (I will pay all costs as agreed).
I'm a right-wing, democratic, conservative environmentalist that thinks the spotted owl tastes like chicken...
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