lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sun, 24 Aug 2008 16:38:43 -0300
From:	Dâniel Fraga <>
To:	"Ilpo Järvinen" <>
Cc:	David Miller <>,,, Netdev <>,
	Patrick Hardy <>,,
Subject: Re: [PATCH] tcp FRTO: in-order-only "TCP proxy" fragility

On Sat, 23 Aug 2008 17:38:32 +0300 (EEST)
"Ilpo Järvinen" <> wrote:

> Thanks for verifying it!

	Ops! i replied too fast! I just got a stalled connection again!

	Important: these files were generated with the HTB patches applied.

	Here are botch tcpdump files:

	Both readmibs:

	Here are both cat /proc/net/tcp:

	I use the following to generate those dumps:

	1) on the server:

tcpdump -s 0 -w dump-mail-server.log -i eth0 host

	2) on the client:

tcpdump -s 0 -w dump-mail-client.log -i eth0 host and port 995

	What happened?

1) the connection was stalled

2) these tcpdumps are the *best ones* I got because although I started them with
the connection already stalled, the connection suddenly is not stalled anymore,
and a few minutes later was stalled again...

3) I keep tcpdump running for more time
	Ps: anyway I could notice that the only two services that
remain stalled is nntp, ftp, pop3 and smtp... http is never stalled,
neither ssh. It seems to affect only "old" protocols :)

	Ps2: anyway, the htb patch seems to help, because the problem
took much longer to happen. With htb patches the problem happens one time a day. 
Without the htb patches the problem happens more than one time a day.

	Ps3: I really doesn't understand why "nmap -sS server"
"solves" the stalled connection issue.

	Ps4: sorry for my hurry feedback before. I thought the problem had gone. Anyway, 
I hope this time I provided the best data for you. Thanks.

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists