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Kylemaul
Lovin' My Firefox
Premium
join:2001-03-30
North Port, FL

reply to hescominsoon

Re: Rolling my own

Errrrrrr....could you dumb your post down a little for us poor novices? How do you determine if your NAT router has the capability to disable decrementing a counter? And what is decrementing and what is 'the counter'?
--
'The tighter the RIAA squeezes their fingers, the more stars and systems will slip through their fingers.'

DonLibes
Premium,ExMod 2001
join:2003-01-19

I think the reference to decrementing the counter was a reference to TTL. But that's not how Bellovin's technique worked.



amenite
The Soylent - It's People
Premium
join:2002-11-21
Ridgewood, NJ
Reviews:
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reply to Kylemaul

said by Kylemaul:
Errrrrrr....could you dumb your post down a little for us poor novices? How do you determine if your NAT router has the capability to disable decrementing a counter? And what is decrementing and what is 'the counter'?

Don't know what routers might allow you to change the ip header info, but once you read the article the idea is pretty straight forward, the IP header info contains an ID string, which is [often/usu.?] assigned in incremental order, like a counter. Knowing the OS, how it handles the numbering, and analyzing the IP id can give you some idea of the hosts behind the NAT device.
--
Time is an abstract concept invented by carbon based life forms to monitor their constant decay.-Thunderclese


succintly put

@207.99.x.x

Iptables supports 'packet mangling' as just one of it's many functions. Packet mangling changes the packet headers.

You can get a lot more advice and help in the 'All Things Unix' forum. I -may- get a friend to write and post a 'how-to' in ATU when I'm done. 'nuff said.



amenite
The Soylent - It's People
Premium
join:2002-11-21
Ridgewood, NJ
Reviews:
·Verizon FiOS
·Verizon Online DSL

said by succintly put:
...
You can get a lot more advice and help in the 'All Things Unix' forum. I -may- get a friend to write and post a 'how-to' in ATU when I'm done. 'nuff said.
That would be excellent, the topic is a little obscure to many of us.
--
Time is an abstract concept invented by carbon based life forms to monitor their constant decay.-Thunderclese

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