jcarle Posted August 31, 2008 Share Posted August 31, 2008 Because of the cable modem. It also has two interfaces (outside address and inside address(es)). Or something like that. I have yet to see a cable modem that does NAT, so this is highly unlikely. Link to comment Share on other sites More sharing options...
GrofLuigi Posted August 31, 2008 Share Posted August 31, 2008 Because of the cable modem. It also has two interfaces (outside address and inside address(es)). Or something like that. I have yet to see a cable modem that does NAT, so this is highly unlikely.Correct again. I don't know what I was thinking when I wrote that... I was lead on by kumarkumar's post and thought it was normal. Of course they should show as different in ipconfig (if set up as cable modem + switch).kumarkumar, you have some unusual setup there GL Link to comment Share on other sites More sharing options...
kumarkumar Posted September 3, 2008 Author Share Posted September 3, 2008 (edited) Let me give some more info that happens in my case. Is it normal?1) Using Cable Modem+DI-514 RouterCase I - DI-514 Router as a Switch(i) IP as seen from websites such as displayip.net --> Different IP in both PCs (IPAddress 1, IPAddress 2) (ii) IP as seen from ipconfig /all - Different IP in both PCs (IPAddress 1, IPAddress 2)Case II - DI-514 Router as Router(i) IP as seen from websites such as displayip.net --> Same IP in both PCs (IPAddress 1)(ii) IP as seen from ipconfig /all --> Different IP in both PCs (IPAddress 2, IPAddress 3)2) Using Cable Modem+Applied Telesyn AT-FS705LE Ethernet Switch(i) IP as seen from websites such as displayip.net --> Different IP in both PCs (IPAddress 1, IPAddress 2) (ii) IP as seen from ipconfig /all --> Different IP in both PCs (IPAddress 1, IPAddress 2) Edited September 3, 2008 by kumarkumar Link to comment Share on other sites More sharing options...
Mr Snrub Posted September 3, 2008 Share Posted September 3, 2008 Let me give some more info that happens in my case. Is it normal?Perfectly normal - same kind of setup I have here.The cable modem forwards the DHCP requests to acquire public IP addresses, so clients that are connected to a SWITCH will get unique public IPs (I have up to 5 through my ISP).When a ROUTER is used, it will obtain 1 public IP address for its WAN interface, and act as a DHCP server for the internal clients who will get unique private IP addresses - from the Internet these clients would all appear to be behind the same public IP address.When the cable modem is connected to a LAN port on the router, the routing logic is not being used - the device is being used as a switch, same as in the first scenario above.My network as it stands today:The clients and server are all behind the DIR-655 router, so only 1 of my 5 public IP addresses is used.If I needed to use a different public IP address, I can connect a client to the DES-1005D switch - but I don't like to connect clients or server to dirty networks.There isn't really much that requires clients to have unique public IP addresses, if a UPnP router is used. Link to comment Share on other sites More sharing options...
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