Just a Question

Panther_abx · 08-08-2005, 08:09 PM

I just discovered that my lan ip info of all my computers is being sent everytime they go online.
The thing that bothers me is that my ISP can see how many computers I have online at any given time.
They allow 5 but I just as soon they only see 1. I thought my router / Firewall was supposed to take care of this.
I have gotten the same results with a Linksys router and My ClarkConnect firewall.
Question is is this a possible security problem of am I just being paranoid?

PCBruiser · 08-08-2005, 08:29 PM

Er ... and how do you know this? If you have a router, your ISP will only see the router. It will only see one MAC and only give you one external IP.

Panther_abx · 08-08-2005, 08:35 PM

Went here and did firewall test. http://www.auditmypc.com/freescan/prefcan.asp
It promptly displayed the internal lan ip of this machine. that shouldn't be visible..right?

PCBruiser · 08-08-2005, 08:40 PM

That's a fake test site. What it does is echo back your internal IP using a Java script which the external site cannot actually see. It looks to you like the external site can see your individual systems, it can't. Essentially it is running the equivalent of ipconfig /all via java and then parsing out the internal IP and displaying it to make it look like it is seeing it externally. It isn't actually seeing it. Not to worry, this one isn't real.

Edit: Good question though, and you were right to be concerned. Hopefully other members will see this as well and not be fooled as well.

Panther_abx · 08-08-2005, 08:44 PM

Ok Thanks! I feel better now!

PCBruiser · 08-08-2005, 08:47 PM

You are welcome, a good question as I said. I'm going to move this to the Security Forum and leave a redirect in Networking as well. That way this thread will appear in both forums.

08-08-2005, 08:09 PM	#1
Panther_abx Registered User Join Date: Nov 2002 Location: Arkansas Posts: 291	Just a Question I just discovered that my lan ip info of all my computers is being sent everytime they go online. The thing that bothers me is that my ISP can see how many computers I have online at any given time. They allow 5 but I just as soon they only see 1. I thought my router / Firewall was supposed to take care of this. I have gotten the same results with a Linksys router and My ClarkConnect firewall. Question is is this a possible security problem of am I just being paranoid? __________________ Alienware Area-51 7500 1000 Watt Power Supply NVIDIA GeForce 8800 GTX 768MB X-fi ExtremeGamer sound card Intel Core 2 Duo E6850 3.0GHz 4MB Cache 1333MHz FSB 2GB DDR2 SDRAM NVIDIA nForce 680i SLI Motherboard Windows Vista Home Premium (RAID 0) - 500GB (2 x 250GB) Serial ATA 7,200 RPM 20X Dual-Layer DVD R/W
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08-08-2005, 08:29 PM	#2
PCBruiser Registered User Join Date: Nov 2003 Posts: 13,497	Er ... and how do you know this? If you have a router, your ISP will only see the router. It will only see one MAC and only give you one external IP.
(Offline)

08-08-2005, 08:35 PM	#3
Panther_abx Registered User Join Date: Nov 2002 Location: Arkansas Posts: 291	Went here and did firewall test. http://www.auditmypc.com/freescan/prefcan.asp It promptly displayed the internal lan ip of this machine. that shouldn't be visible..right? __________________ Alienware Area-51 7500 1000 Watt Power Supply NVIDIA GeForce 8800 GTX 768MB X-fi ExtremeGamer sound card Intel Core 2 Duo E6850 3.0GHz 4MB Cache 1333MHz FSB 2GB DDR2 SDRAM NVIDIA nForce 680i SLI Motherboard Windows Vista Home Premium (RAID 0) - 500GB (2 x 250GB) Serial ATA 7,200 RPM 20X Dual-Layer DVD R/W
(Offline)

08-08-2005, 08:40 PM	#4
PCBruiser Registered User Join Date: Nov 2003 Posts: 13,497	That's a fake test site. What it does is echo back your internal IP using a Java script which the external site cannot actually see. It looks to you like the external site can see your individual systems, it can't. Essentially it is running the equivalent of ipconfig /all via java and then parsing out the internal IP and displaying it to make it look like it is seeing it externally. It isn't actually seeing it. Not to worry, this one isn't real. Edit: Good question though, and you were right to be concerned. Hopefully other members will see this as well and not be fooled as well.
(Offline)

08-08-2005, 08:44 PM	#5
Panther_abx Registered User Join Date: Nov 2002 Location: Arkansas Posts: 291	Ok Thanks! I feel better now! __________________ Alienware Area-51 7500 1000 Watt Power Supply NVIDIA GeForce 8800 GTX 768MB X-fi ExtremeGamer sound card Intel Core 2 Duo E6850 3.0GHz 4MB Cache 1333MHz FSB 2GB DDR2 SDRAM NVIDIA nForce 680i SLI Motherboard Windows Vista Home Premium (RAID 0) - 500GB (2 x 250GB) Serial ATA 7,200 RPM 20X Dual-Layer DVD R/W
(Offline)

08-08-2005, 08:47 PM	#6
PCBruiser Registered User Join Date: Nov 2003 Posts: 13,497	You are welcome, a good question as I said. I'm going to move this to the Security Forum and leave a redirect in Networking as well. That way this thread will appear in both forums.
(Offline)

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