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TTL field???

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# 8  
Old 10-11-2001
This can be used to help defeat OS guessing in tools like queso and nmap. It's one of the easiest changes you can make to mess with the results. I recall that there were a few such hints/hacks in Hacking Linux Exposed...

The best part, however, is that the 2.4.* series kernels are able to obfuscate the OS completely. Any nmap scan will report that you are whoever you choose to be - for example, you can make yourself appear to the casual scanner to be a MacOS 7.1 machine, or a HP LaserJet Printer!

Check out the netfilter man pages, and this link:
http://sourceforge.net/projects/ippersonality/

Happy obfuscating!
# 9  
Old 10-11-2001
MySQL that was Superb
WoW!!! ,
that was a great idea.. I am wonderstuck at the idea of Solvman.. Great going man....
SmilieSmilie
# 10  
Old 10-11-2001
BTW: If anyone changes MAXTTL in linux ip.h and rebuilds the kernel, please post and let everyone know that, indeed, this is one possible solution for linux. Thanks!!

Or, if you find that it can be changed another way, please post.


Or. if you find a clever way to do it for any other system, please post.

Thanks again!!
# 11  
Old 10-11-2001
Lightbulb ..
U know, people, while reading all those replies, I came up with an idea. What if to create an application making TTL appear all the time randomly let's say in some range from 100 - 255. It would make lots of scanners confused. I wanna create a project on SourceForge. What do you think about the idea itself?

Later on
Smilie
# 12  
Old 10-12-2001
Check out this page:
http://project.honeynet.org/papers/finger/
Farther down, it'll tell you how to change the TTL for Solaris, Linux, and NT... An overall good read, as well.
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