HOORAY: IMAP bug identified!!! - Page 2

SanjaySheth · 24 Apr 2002, 06:07 AM

Quote:

Pobelly--aren't you joining us on IRC?

Just curious, what channels/IRC nets do most Fastmailers congregate on?

kirill · 24 Apr 2002, 07:25 AM

See http://www.emaildiscussions.com/...&threadid=4002 for details.

--
Kirill

**munchkin** · 24 Apr 2002, 07:35 AM

Quote:

Originally posted by ssheth

Just curious, what channels/IRC nets do most Fastmailers congregate on?

Quote:

Originally posted by kirill
See http://www.emaildiscussions.com/...&threadid=4002 for details.

Cool, didn't know that. Thank you

kirill · 24 Apr 2002, 08:11 AM

We're trying once again tomorrow. Same time.

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Kirill

Jeremy Howard · 24 Apr 2002, 12:42 PM

I've turned on Syncookies now after chatting to K some more about them. I had to compile them into the server which is why we had the reboot today.

pobelly · 24 Apr 2002, 01:48 PM

so, ummm... if i wanted some perspective on why syncookies do or don't break the protocol, are there any suggested places i look? something other than "uh-huh!"..."nuh-uh!"..."uh-huh!" newsgroup archives? otherwise, i'm sure i'll find something eventually...

Jeremy Howard · 24 Apr 2002, 02:15 PM

The definitive reference is probably what K quoted from: http://cr.yp.to/syncookies.html

pobelly · 24 Apr 2002, 02:40 PM

well, that was where i started, so that makes that easy... some of the refutations are a little... ummm... matter-of-fact. i guess i'll just accept 'em until i have a good enough grasp to form my own conclusions...

there just aren't enough hours in the day to not take the easy way out once in a while...

Jeremy Howard · 24 Apr 2002, 02:44 PM

Quote:

Originally posted by pobelly
some of the refutations are a little... ummm... matter-of-fact.

You just have to learn DJB's method of argument. It starts with the premise "DJB is always right". Then you simply have to listen and do what he says. It really simplifies discussions as long as everyone understands the basic rules...

kirill · 24 Apr 2002, 05:07 PM

LOL J

Right!

--
Kirill

ppetru · 24 Apr 2002, 06:10 PM

Quote:

Originally posted by Jeremy Howard
echo 0 > /proc/sys/net/ipv4/tcp_timestamps

echo 0 > /proc/sys/net/ipv4/tcp_window_scaling
echo 0 > /proc/sys/net/ipv4/tcp_sack

Just curious, why are you disabling these? They are usually regarded as useful TCP extensions.

Quote:

#used to accept connections from broken solaris machines
echo 0 > /proc/sys/net/ipv4/tcp_ecn

Actually ECN has no effect on the inbound side, the problem occurs only outbound, when connecting to sites with firewalls that don't recognize it.

More info at:

http://www.kernel.org/pub/linux/docs/lkml/#s14-2
http://gtf.org/garzik/ecn/

Jeremy Howard · 25 Apr 2002, 05:10 AM

Quote:

Originally posted by ppetru
Just curious, why are you disabling these? They are usually regarded as useful TCP extensions.

Window scaling, at least, is incompatible with syncookies (I believe). The other 2 I can't remember where they came from--they're pulled from someone's advice I read somewhere; I'll try and read up some more...

sterdeus · 25 Apr 2002, 05:25 AM

Wow, up so early Jeremy?

Jeremy Howard · 25 Apr 2002, 06:09 AM

Quote:

Originally posted by sterdeus
Wow, up so early Jeremy?

Yep. That's never a good sign... POP was down (see the other thread about this). Which means that this bug isn't fixed after all...

I'm now reading the Cyrus IMAP code to see if I can work out where this is happening...

24 Apr 2002, 07:25 AM	#17
kirill Cornerstone of the Community Join Date: Jun 2001 Posts: 879	See http://www.emaildiscussions.com/...&threadid=4002 for details. -- Kirill

24 Apr 2002, 08:11 AM	#19
kirill Cornerstone of the Community Join Date: Jun 2001 Posts: 879	We're trying once again tomorrow. Same time. -- Kirill

24 Apr 2002, 12:42 PM	#20
Jeremy Howard Ultimate Contributor Join Date: Sep 2001 Location: Australia Posts: 11,501	I've turned on Syncookies now after chatting to K some more about them. I had to compile them into the server which is why we had the reboot today.

24 Apr 2002, 01:48 PM	#21
pobelly Cornerstone of the Community Join Date: Nov 2001 Posts: 586	so, ummm... if i wanted some perspective on why syncookies do or don't break the protocol, are there any suggested places i look? something other than "uh-huh!"..."nuh-uh!"..."uh-huh!" newsgroup archives? otherwise, i'm sure i'll find something eventually...

24 Apr 2002, 02:15 PM	#22
Jeremy Howard Ultimate Contributor Join Date: Sep 2001 Location: Australia Posts: 11,501	The definitive reference is probably what K quoted from: http://cr.yp.to/syncookies.html

24 Apr 2002, 02:40 PM	#23
pobelly Cornerstone of the Community Join Date: Nov 2001 Posts: 586	well, that was where i started, so that makes that easy... some of the refutations are a little... ummm... matter-of-fact. i guess i'll just accept 'em until i have a good enough grasp to form my own conclusions... there just aren't enough hours in the day to not take the easy way out once in a while...

24 Apr 2002, 05:07 PM	#25
kirill Cornerstone of the Community Join Date: Jun 2001 Posts: 879	LOL J Right! -- Kirill

25 Apr 2002, 05:25 AM	#28
sterdeus Senior Member Join Date: Mar 2002 Location: Canada Posts: 182	Wow, up so early Jeremy?