What is 192.168.250.1?

Yes. The result is still the same. I have done a Google search for that IP address and some say this is actually a private IP (rather than WAN IP). So I guess it is from the router itself? Is it safe to just check “remember my answer” and click on Allow?

Anyways, I am still a bit concerned about that as this has never happened before.

On another note, the “two router” situation in the Network is only present when I am using WLAN. It does not occur when I am using Ethernet connection.

Also, one day ago CIS is popping up another message. It is almost the same as the one mentioned at the beginning of this thread, but the IP address is the exact address of my WAN IP.

So what is going on?

Radaghast should be an IP expert LOL

Open the command prompt and run

ipconfig

and let us know what the gateway address of your connection is and the internal IP address of your wireless network adapter is.

When you changed the SSID of your connection what SSID was shown by the router with IP address 192.168.250.1?

Thanks.

Gateway is 192.168.1.1
WLAN IP is 192.168.1.2

Sorry I am not very sure what you meant by “When you changed the SSID of your connection what SSID was shown by the router with IP address 192.168.250.1?”

That’s what Radaghast suggested in the above:

He wanted to see if the two SSID’s you see are from two different routers or not.

His subnet is /24 so this traffic can only be useful if it’s routed over his WAN interface towards his WLAN interface and back suggesting ‘the provider’ WAN side is allowing RFC 1918 ranges on the wrong side of the wire. This tends to happen and is mostly seen on Cable provider networks where shared LAN’s are used to WAN multiple users.

What is your WAN interface connected to and does the web-interface of your router show that IP address, any indication of 192.168. range used e.g. forwarded DNS address on the WAN settings etc?

Or do you perhaps use a PDA or some other device connected to your system every now and then?

As far as I remember the D-links support telnet management, so you could download something like PuTTY - no installation required - then:

  1. Open putty
  2. Select the telnet radio button
  3. Enter the IP address of your router (192.168.1.1)
  4. Select Open
  5. Enter your router login and password
  6. at the prompt type ifconfig (not iPconfig)
  7. Copy the output details and post them here…

After changing the SSID, the network section in Computer does not change. As I stated earlier, the two "SSID"s are actually router model numbers (one is “2740B” and the other is “DSL-2740B adsl router”). If I turn off the WLAN switch on my router, both "SSID"s disappear simultaneously. If I connect to the router via Ethernet, only the latter shows up.

To confirm. In the router interface, you changed the values I highlighted in the image above and made sure the changes were picked up by the wireless adapter in your PC?

I have done a Google search for that IP address and some say this is actually a private IP (rather than WAN IP).

It is a reserved (private) address

So I guess it is from the router itself?

Unless your router is allocating two separate network blocks, It’s coming from somewhere else.

Is it safe to just check "remember my answer" and click on Allow?

I wouldn’t, at least until you understand where it’s coming from.

Anyways, I am still a bit concerned about that as this has never happened before.

Another good reason for not simply allowing it

On another note, the "two router" situation in the Network is only present when I am using WLAN. It does not occur when I am using Ethernet connection.

Can you confirm the SSID from the router.

Also, one day ago CIS is popping up another message. It is almost the same as the one mentioned at the beginning of this thread, but the IP address is the exact address of my WAN IP.

We’d need more information about the message. Does the address begin with 202.154?

I have tried using putty, but unfortunately every time when I click Open, a black box appears with a green cursor (somewhat similar to CMD except for the cursor color). Immediately after this, Windows produces a “warning” sound (the system sound similar to that of an “error” – “■■■■!”), than the whole program closes.

Is it because my system is x64 and not x86???

To confirm. In the router interface, you changed the values I highlighted in the image above and made sure the changes were picked up by the wireless adapter in your PC? YES.

Can you confirm the SSID from the router. YES.

Does the address begin with 202.154? YES. I have tried directly entering that IP into my browser, and it opens the configuration page of my router (similar to 192.168.1.1).

Thanks.

That, at least, confirms the WAN side of the router is not using a reserved address space. Have you tried connecting directly to:

192.168.250.1
192.168.251.1
192.168.252.1

If so, what happens?

It takes a long time to load, and then a page appears saying the connection to the IP was interrupted.

Thanks.

I’m not sure this will give me what I’d like but it’s worth doing:

  1. Open a command prompt and type the following:

a. arp -a > c:\arp.txt
b. route print > c:\route.txt
c. ping -a 192.168.250.1 > c:\ping150.txt
d. tracert 192.168.250.1 > c:\tracert150.txt

For c and d repeat using 151.1 and 152.1

Zip the files and attach to a post.

Here it is.

[attachment deleted by admin]

As anticipated, it didn’t tell me very much. Back to the router:

  1. log on to your router
  2. Open Advanced/Remote Management
  3. make sure Telent is checked
  4. Log on to the router using Telnet, as described earlier
  5. type arp -a (post the results)
  6. Type ifconfig (post the results)
  7. In the router web interface open Maintenance/System Log
  8. Post the results

If you want you can create a remote log.

Sorry I cant find the Advanced/Remote Management part.

[attachment deleted by admin]

I guess you must have some old firmware or a different revision of the router… Have you looked under the other tabs?

[attachment deleted by admin]

My router is Rev C3, I have looked through all tabs.

I guess you could always update the firmware. Other than that, It’s difficult to give any more suggestions. As far as I understand, you only see these log entries when using wireless, so unless your router is doing something odd in wireless mode, my best guess, they’re coming from some neighbours network. With that in mind, unless someone else has any ideas, use a wired connection or block the connections without logging.

Actually, you could allow the connection once and as soon as it happens run arp -a from a command prompt. If it sees the connection, it will give you the MAC address…

The firmware for my router is already the most up to date.

The output (right after clicking on Allow) is the same as the one that I provided earlier in this thread. Ie:

Interface: 192.168.1.3 — 0xa
Internet Address Physical Address Type
192.168.1.1 00-24-01-56-82-b0 dynamic
192.168.1.255 ff-ff-ff-ff-ff-ff static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
239.255.255.250 01-00-5e-7f-ff-fa static
255.255.255.255 ff-ff-ff-ff-ff-ff static

Thanks very much for your assistance and patience.