Solved different ip addresses when checked by differ

July 13, 2011 at 04:00:42
Specs: Windows XP
I have a dynamic IP address service from my ISP, and I expect my external IP address to be different at different times. However, I don't understand how I can have several different IP addresses AT THE SAME TIME if to believe to different web sites that I checked with. They are similar, but different: namely it is X.Y.Z.243 on ip.my-proxy.com, X.Y.Z.244 on speedtest.net and X.Y.Z.245 on www.whatismyip.com. I can check it in any order, one after another or simultaneously, and it is like every web site gets its own IP address assign to it when I go there. The X.Y.Z. range definitely belongs to my ISP, but why I get different subsets of this range on different web sites is beyond me. Any explanation would be greatly appreciated. - Greg

P.S. One more weird fact: when I check WAN settings in my router, it shows A.B.22.78 as IP address and A.B.0.1 as Default Gateway; A and B being completely different from X,Y and Z and do not directly point to my ISP, instead the whois search gives the following info:
"10.0.0.0 - 10.255.255.255
netname: IANA-ABLK-RESERVED1
descr: Class A address space for private internets
descr: See http://www.ripe.net/db/rfc1918.html for details
country: EU # Country is really world wide
org: ORG-IANA1-RIPE
admin-c: RFC1918-RIPE
tech-c: RFC1918-RIPE
status: ALLOCATED UNSPECIFIED
remarks: Country is really worldwide
remarks: This network should never be routed outside an enterprise"


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✔ Best Answer
July 13, 2011 at 13:34:16
To Curt: could you please expand on what exactly my mention of Static IP service clears up?

In your previous response you said, and I quote, "I actually have a static IP service with these guys, and when I set up my router for Static IP, I get correct IP address (as assigned to me) on all the web sites, as well as in the WAN section of Status report. However, for the last week Internet connection was intermittent - I was forced to reboot the router (or at least repair the wireless connection on my XP SP3) every ten minutes or so. After I restored router factory settings (which switched router to DHCP setting),"

The way I read that is you saying your account with your ISP is for a static IP on the WAN side of your router and while configured with the aformentioned static IP, you always showed the correct (same) address wherever you went online.

Then, you reset the router to factory defaults and the WAN side defaulted to DHCP and now you're exhibiting the odd behaviour.

Also, what do you mean by "You need to reconfigure the WAN port of your router for your "static" connection"? I already know that if I configure my router for a static IP, everything with the IP addresses looks fine - except the Internet connection is unreliable and I need to reset it every 5 to 10 minutes.

You don't mention if you did reapply the static settings to your router so I assumed you hadn't and told you to do so. If you haven't in fact done so, do it. Just because it misbehaved before doesn't mean it will now. Sometimes resetting a router will fix whatever brain fart it was having.

If you clicked on my name above and read my "how-to" guide titled, "Troubleshooting Wireless Issues" (which doubles as a "troubleshooting possible router issues" guide) you'll se what you did is actually one of the steps I recommend.

Anyhow, if you haven't reapplied your static settings to the WAN side of the router don't assume it won't work. Test it and see.

If the issue continues, I would recommend replacing the router unless this is as I mentioned at the outset, something the ISP is doing to their DHCP network. If you're really curious what's going on, you could still call them and ask.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***



#1
July 13, 2011 at 07:31:03
I'm not sure what's going on and without talking to your ISP, I'd be unable to say.

I do know you can't have more than one IP address at a time on any one interface.

I suspect your ISP is doing something with the subnetting, NAT and proxy on their network. If you're really curious, you should contact their support team. Don't expect the helpdesk person who answers the phone to have a clue. You'd have to actually talk to one of the network technicians that works with their broadband department which I doubt you'll be able to do. But you never know until you try.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#2
July 13, 2011 at 07:48:08
Thanks a lot for the reply, Curt! However, since I am now in the South-Eastern Europe and most people at my ISP don't speak English (in addition to the national tradition of returning phone calls after several days, if at all), chances of getting any useful info from them are nil.

Some additional info on the setup: I actually have a static IP service with these guys, and when I set up my router for Static IP, I get correct IP address (as assigned to me) on all the web sites, as well as in the WAN section of Status report. However, for the last week Internet connection was intermittent - I was forced to reboot the router (or at least repair the wireless connection on my XP SP3) every ten minutes or so. After I restored router factory settings (which switched router to DHCP setting), connection is rock solid but I have this crazy thing with multiple addresses. I don't know whether these details are helpful to someone so he/she can resolve the issue, but if not, I am inclined to ignore multiple addresses and keep dynamic setting (since the main thing I care about is working Internet connection).


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#3
July 13, 2011 at 08:05:43
setting your router to factory specs due to wireless is an indication you have router issues not isp issues. Or you could be having a issue with your wireless card

to clarify this issue next time you have wireless problems connect wired and see if everything is just fine.

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#4
July 13, 2011 at 08:11:53
Some additional info on the setup: I actually have a static IP service with these guys, and when I set up my router for Static IP, I get correct IP address (as assigned to me) on all the web sites, as well as in the WAN section of Status report. However, for the last week Internet connection was intermittent - I was forced to reboot the router (or at least repair the wireless connection on my XP SP3) every ten minutes or so. After I restored router factory settings (which switched router to DHCP setting), connection is rock solid but I have this crazy thing with multiple addresses.

Ok this clears a lot up.

You need to reconfigure the WAN port of your router for your "static" connection.

If you continue having issues, click on my name above and read my "how-to" guide titled, "Troubleshooting Wireless Issues"

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#5
July 13, 2011 at 12:45:28
To Wanderer: naturally, when troubles started the first thing I did was to haul my DELL laptop next to my D-Link DIR-655 router and connect them with a cat5e cable - no difference in performance or stability of the Internet link. So the problem may be a router issue but is definitely not a wireless issue.

To Curt: could you please expand on what exactly my mention of Static IP service clears up? Also, what do you mean by "You need to reconfigure the WAN port of your router for your "static" connection"? I already know that if I configure my router for a static IP, everything with the IP addresses looks fine - except the Internet connection is unreliable and I need to reset it every 5 to 10 minutes. The question was: why, when I configure my router for a dynamic IP (while my cable modem is probably marked by ISP for a static IP connection), I get different IP addresses AT THE SAME TIME at different web sites? Admittedly, this is more academic curiosity than a practical issue since if I am getting a better connection with DHCP, I will forgo pluses of a static IP address (I don't see much improvement in speed when static connection is on, and when a static address is required I can always use some DynDNS).

To both of you: thanks for trying to help me figure this out, whether we are successful in the end or not.


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#6
July 13, 2011 at 13:17:21
" no difference in performance or stability of the Internet link. So the problem may be a router issue but is definitely not a wireless issue."

Sorry but that is an incorrect conclusion imho.

It can be the wireless with the router [replace router]
It can be the wireless with your dell [disable and use a pcmcia card]
It can be a combination of both [wireless incompatibility] [try different wireless devices - same problem its the router - not the same its your dell]
It can be some wireless interference. [don't use any wireless phones - check your wifi channel with xirrus wifi inspector and change the channel to one not used in your area]

Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's


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#7
July 13, 2011 at 13:34:16
✔ Best Answer
To Curt: could you please expand on what exactly my mention of Static IP service clears up?

In your previous response you said, and I quote, "I actually have a static IP service with these guys, and when I set up my router for Static IP, I get correct IP address (as assigned to me) on all the web sites, as well as in the WAN section of Status report. However, for the last week Internet connection was intermittent - I was forced to reboot the router (or at least repair the wireless connection on my XP SP3) every ten minutes or so. After I restored router factory settings (which switched router to DHCP setting),"

The way I read that is you saying your account with your ISP is for a static IP on the WAN side of your router and while configured with the aformentioned static IP, you always showed the correct (same) address wherever you went online.

Then, you reset the router to factory defaults and the WAN side defaulted to DHCP and now you're exhibiting the odd behaviour.

Also, what do you mean by "You need to reconfigure the WAN port of your router for your "static" connection"? I already know that if I configure my router for a static IP, everything with the IP addresses looks fine - except the Internet connection is unreliable and I need to reset it every 5 to 10 minutes.

You don't mention if you did reapply the static settings to your router so I assumed you hadn't and told you to do so. If you haven't in fact done so, do it. Just because it misbehaved before doesn't mean it will now. Sometimes resetting a router will fix whatever brain fart it was having.

If you clicked on my name above and read my "how-to" guide titled, "Troubleshooting Wireless Issues" (which doubles as a "troubleshooting possible router issues" guide) you'll se what you did is actually one of the steps I recommend.

Anyhow, if you haven't reapplied your static settings to the WAN side of the router don't assume it won't work. Test it and see.

If the issue continues, I would recommend replacing the router unless this is as I mentioned at the outset, something the ISP is doing to their DHCP network. If you're really curious what's going on, you could still call them and ask.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#8
July 13, 2011 at 14:32:13
Again,

To Wanderer: I am not sure I follow you. When I checked the connection with LAN cable, I disabled wireless (with hardware switch), so I don't understand how wireless interference could cause problems with my wired Internet connection (unless you mean that unrelated interference from things like cordless phones and microwaves somehow is affecting router WIRED functions, but then it is definitely ROUTER issues). BTW, I checked the situation with another wireless laptop (Lenovo) with the same results. In any case, we are now arguing semantics, and probably both have better things to do with our time.

To Curt: You understood the situation exactly right. Before full factory reset I configured WAN side of the router several times to both Static and Dynamic settings, and it's always been the same: in Static everything with IP addresses was fine but connection was unreliable; in Dynamic the IP addresses were crazy but connection was good. After the factory reset I was using Dynamic settings, but as you suggested I switched the router to a Static setting again, and so far (3 hrs and counting) it is working fine. If the connection goes down, I will revert to DHCP and ignore strange addresses; if the connection holds, I will enjoy it as it is. We probably will never know what "brain fart" exactly happened and why my laptop simultaneously gets different external IP addresses, but I am not willing to spend more of my time on this little mystery and don't want you to waste your time either: "There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy".

Thanks to everybody for their efforts.


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