Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On Wed, Nov 19, 2008 at 9:20 PM, Ron Johnson [EMAIL PROTECTED] wrote: On 11/19/08 07:06, 中和刘 wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks IP packets don't contain the MAC address. You'd have to run some asynchronous arp ping against the IP address. i heard that arp ping only get the mac address on the LAN, it cannot get mac address outside the LAN. (Why do I get the feeling that some Chinese Government rule is behind this request?) no, I'm not a member of chinese government, I just want to provide better service in my website :) -- Ron Johnson, Jr. Jefferson LA USA If you don't agree with me, you are worse than Hitler!!! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On Wed, Nov 19, 2008 at 3:06 PM, 中和刘 [EMAIL PROTECTED] wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] Well, if the visitor uses DHCP, then his IP will change at some point, so one cannot tell the MAC if one knows the IP...however, there are tools like wireshark that can help you with MAC's.
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
2008/11/19 Aioanei Rares [EMAIL PROTECTED]: On Wed, Nov 19, 2008 at 3:06 PM, 中和刘 [EMAIL PROTECTED] wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] Well, if the visitor uses DHCP, then his IP will change at some point, so one cannot tell the MAC if one knows the IP...however, there are tools like wireshark that can help you with MAC's. thanks, i will try the tool -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
中和刘 wrote: On Wed, Nov 19, 2008 at 9:20 PM, Ron Johnson [EMAIL PROTECTED] wrote: On 11/19/08 07:06, 中和刘 wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks IP packets don't contain the MAC address. You'd have to run some asynchronous arp ping against the IP address. i heard that arp ping only get the mac address on the LAN, it cannot get mac address outside the LAN. (Why do I get the feeling that some Chinese Government rule is behind this request?) no, I'm not a member of chinese government, I just want to provide better service in my website :) I guess most sites just use cookies for this purpose. -- Ron Johnson, Jr. Jefferson LA USA If you don't agree with me, you are worse than Hitler!!! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] -- If you can't explain it simply, you don't understand it well enough. -- Albert Einstein -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On 11/19/08 07:27, 中和刘 wrote: On Wed, Nov 19, 2008 at 9:20 PM, Ron Johnson [EMAIL PROTECTED] wrote: On 11/19/08 07:06, 中和刘 wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks IP packets don't contain the MAC address. You'd have to run some asynchronous arp ping against the IP address. i heard that arp ping only get the mac address on the LAN, it cannot get mac address outside the LAN. Hmmm. Looks like you're right. (Why do I get the feeling that some Chinese Government rule is behind this request?) no, I'm not a member of chinese government, I just want to provide better service in my website :) I was thinking more of government regulation. -- Ron Johnson, Jr. Jefferson LA USA If you don't agree with me, you are worse than Hitler!!! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On 11/19/08 07:16, Aioanei Rares wrote: [snip] Well, if the visitor uses DHCP, then his IP will change at some point, so one cannot tell the MAC if one knows the IP...however, there are tools like wireshark that can help you with MAC's. How, if IP packets don't contain the source MAC? -- Ron Johnson, Jr. Jefferson LA USA If you don't agree with me, you are worse than Hitler!!! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
中和刘: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks No, it's not possible. Ethernet frames aren't routed on the internet. You cannot even be sure that your users connect using Ethernet on their end. Usually, HTTP-cookies are used as a solution for your problem. J. -- Television advertisements are the apothesis of twentieth century culture. [Agree] [Disagree] http://www.slowlydownward.com/NODATA/data_enter2.html signature.asc Description: Digital signature
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On 11/19/08 07:06, 中和刘 wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks IP packets don't contain the MAC address. You'd have to run some asynchronous arp ping against the IP address. (Why do I get the feeling that some Chinese Government rule is behind this request?) -- Ron Johnson, Jr. Jefferson LA USA If you don't agree with me, you are worse than Hitler!!! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On Wed, Nov 19, 2008 at 9:50 PM, Jochen Schulz [EMAIL PROTECTED] wrote: 中和刘: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks No, it's not possible. Ethernet frames aren't routed on the internet. You cannot even be sure that your users connect using Ethernet on their end. thanks, i will give up Usually, HTTP-cookies are used as a solution for your problem. J. -- Television advertisements are the apothesis of twentieth century culture. [Agree] [Disagree] http://www.slowlydownward.com/NODATA/data_enter2.html -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkkkGbwACgkQ+AfZydWK2zmkRwCgr+B1A4G2tLb0n1lRbGJXhyIM suIAn03CUuV3MD8PRjfdEnURYh62jC6k =4cbC -END PGP SIGNATURE- -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On Wed, 19 Nov 2008 21:06:13 +0800 中和刘 [EMAIL PROTECTED] wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks It's not possible. You can only get mac addresses using arp on the local lan. You can't even be sure that you got a correct ip address if your users are going through a proxy or nat. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
Original Message From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: how to get the mac address(network card physical address) of a remote computer by its IP address? Date: Wed, 19 Nov 2008 15:16:34 +0200 On Wed, Nov 19, 2008 at 3:06 PM, ??? [EMAIL PROTECTED] wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks -- Welcome to visit my home page http://www.starliu.com [It's only accessable when my pc is turned on, on which it's hosted.] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED] Well, if the visitor uses DHCP, then his IP will change at some point, so one cannot tell the MAC if one knows the IP...however, there are tools like wireshark that can help you with MAC's. AFAIK the MAC address is only available within a single network. Once the packet leaves the net as an IP packet all knowledge of the MAC disappears. Also wireshark (PKA Ethereal) is designed to do packet analysis by sniffing on a single net (usually by putting the computer on which wireshark is hosted in promiscuous mode). This doesn't work outside the originater's net Larry -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: how to get the mac address(network card physical address) of a remote computer by its IP address?
On Wed, Nov 19, 2008 at 8:06 AM, 中和刘 [EMAIL PROTECTED] wrote: when a user visit my website, it's easy to get the ip address of the user, but i think IP address is not as stable as mac address, so I hope I can get the mac address of the user according to its IP address, is it possible? thanks No. It is not possible unless you're on the same physical network.
