Mac Makeup will be a great help for you in the situation you have a MAC-IP relation with your ISP.

Mac MakeUp let's you change the MAC address of any of the interfaces present on your Windows. Sometimes this is referred as MAC address spoofing. You can choose a new address of your choice, or get the new one with the help of the tool, which sets the OID part according to your preference.

Here are some key features of "Mac Makeup":

? Enable routing features
? Allow user raw access to sockets
? Enable address mask reply (ICMP)
? Accept ICMP Redirect
? Disable hw acceleration
? Enable selective acknowledge (SACK)
? Max number of TCP connections
? Max user port
? Default TTL
? Source routed packets behaviour
? Multicast support

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