tcp/ip stack debugging - Club CDFreaks

*Upp3rd0G* · 09-06-2003

Ok, I have a difficult question again. I've asked around, most people don't even understand what I want...

I am looking for a tool which allows me to see which decissions the tcp/ip stack takes in order to drop/allow a connection. Look at this example:

Laptop x with ip address x.x.x.x can connect to machine y. Laptop z with ip address z.z.z.z can connect to machine y, but machine y disconnects/drops the tcp connection sequence by sending a RST.

I want to know why the decission to sent a RST to laptop z is taken.

So I am looking for Unix and/or Windows software which gives me more insight in the above problem.

Anybody any idea? If you know of a place where I might post this question as well, let me know!

*ckin2001* · 10-06-2003

http://www.caida.org/projects/internetatlas/viz/SF/

has a script for analyzing tcp flags.

best i could find - i dropped my networking course last sem

*Upp3rd0G* · 10-06-2003

Thanx for taking a look at my question, but this is not what I ment... I am looking for a tool which allows me to the follow the steps the tcp/ip stack of the OS takes. Why does it sent an 'ACK' or 'ACK/NACK' or 'RST', etc.

*Mr. Belvedere* · 10-06-2003

Perhaps one of these tools ?

*Upp3rd0G* · 10-06-2003

Nope, sorry, nothing there...

*ckin2001* · 10-06-2003

eek - not the end result - but how it gets there.....Unix i can probably find, eventually...windows? pry not. ill look tonight.

best link i found offhand - http://www.private.org.il/tcpip_rl.html

09-06-2003	#1 (permalink)
Upp3rd0G CDFreaks Resident Join Date: Oct 2001 Location: NL Posts: 2,108	tcp/ip stack debugging <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> Ok, I have a difficult question again. I've asked around, most people don't even understand what I want... I am looking for a tool which allows me to see which decissions the tcp/ip stack takes in order to drop/allow a connection. Look at this example: Laptop x with ip address x.x.x.x can connect to machine y. Laptop z with ip address z.z.z.z can connect to machine y, but machine y disconnects/drops the tcp connection sequence by sending a RST. I want to know why the decission to sent a RST to laptop z is taken. So I am looking for Unix and/or Windows software which gives me more insight in the above problem. Anybody any idea? If you know of a place where I might post this question as well, let me know! __________________ You can help us to help you even better. You can help fund our research Please read the rules Please detail your problem... What info do U provide? Try our Search... function Please read this for more info on audio copy protections

10-06-2003	#2 (permalink)
ckin2001 CDFreaks Resident Join Date: Jan 2002 Location: Strongbadia Posts: 3,408	http://www.caida.org/projects/internetatlas/viz/SF/ has a script for analyzing tcp flags. best i could find - i dropped my networking course last sem __________________ www.livingwithoutmicrosoft.org last 5 cd's Avril Lavigne - Whatever the new one is called Lucky Boys Confusion - Throwing the Game lostprophets - Start Something Story of the Year - Page Avenue Flaming Lips - Yoshimi Battles the Pink Robots Don't let schooling interfere with your education. -Mark Twain

10-06-2003	#3 (permalink)
Upp3rd0G CDFreaks Resident Join Date: Oct 2001 Location: NL Posts: 2,108	Thanx for taking a look at my question, but this is not what I ment... I am looking for a tool which allows me to the follow the steps the tcp/ip stack of the OS takes. Why does it sent an 'ACK' or 'ACK/NACK' or 'RST', etc. __________________ You can help us to help you even better. You can help fund our research Please read the rules Please detail your problem... What info do U provide? Try our Search... function Please read this for more info on audio copy protections

10-06-2003	#4 (permalink)
Mr. Belvedere CDFreaks Resident Join Date: Jun 2001 Location: Cthulhu Ninja Zombie Posts: 14,667	Perhaps one of these tools ? __________________ I might be evil. Want to make dvd movie backups? Take the 5-step or the 2-step process. Fun, fast and free!

10-06-2003	#5 (permalink)
Upp3rd0G CDFreaks Resident Join Date: Oct 2001 Location: NL Posts: 2,108	Nope, sorry, nothing there... __________________ You can help us to help you even better. You can help fund our research Please read the rules Please detail your problem... What info do U provide? Try our Search... function Please read this for more info on audio copy protections

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10-06-2003	#6 (permalink)
ckin2001 CDFreaks Resident Join Date: Jan 2002 Location: Strongbadia Posts: 3,408	eek - not the end result - but how it gets there.....Unix i can probably find, eventually...windows? pry not. ill look tonight. best link i found offhand - http://www.private.org.il/tcpip_rl.html __________________ www.livingwithoutmicrosoft.org last 5 cd's Avril Lavigne - Whatever the new one is called Lucky Boys Confusion - Throwing the Game lostprophets - Start Something Story of the Year - Page Avenue Flaming Lips - Yoshimi Battles the Pink Robots Don't let schooling interfere with your education. -Mark Twain

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