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How to change TTL in packets' headers ?


patrykens
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That's one evil ISP. I think you need to do something using /sbin/ipfw, but I've never used it directly. When you go to "System Preferences, Sharing" what you are seeing there is a dumbed down interface for /sbin/ipfw.

 

Supposedly there are some non-Apple GUI frontends for it that run on OSX. Google should get you started.

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Good work! The only problem is, I don't know how to use it either. I can compile it OK, but it interacts with the IPFW routing tables, and they're something I'm not familiar with on OSX.

 

How did you determine packets were coming in with TTL set to 1? Did you run a packet sniffer and see it?

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