Re: [squid-users] Problems with hotmail and facebook

On Sun, 14 Nov 2010 17:04:10 -0800 (PST), Landy Landy
<landysaccount_at_yahoo.com> wrote:
> --- On Sun, 11/14/10, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
>
>> From: Amos Jeffries <squid3_at_treenet.co.nz>
>> Subject: Re: [squid-users] Problems with hotmail and facebook
>> To: "Landy Landy" <landysaccount_at_yahoo.com>
>> Cc: squid-users_at_squid-cache.org
>> Date: Sunday, November 14, 2010, 7:42 PM
>> On Sun, 14 Nov 2010 16:19:41 -0800
>> (PST), Landy Landy
>> <landysaccount_at_yahoo.com>
>> wrote:
>> > Someone suggested to disable pmtu on squid and on the
>> linux gw.
>> >
>> > I was able to disable it on linux:
>> >
>> > echo 1 >  /proc/sys/net/ipv4/ip_no_pmtu_disc
>> >
>> > That hasn't change anything.
>> >
>> > Now, do I really need to disable it on squid in order
>> to work? I read
>> this:
>> >
>> > disable-pmtu-discovery=
>> > Control Path-MTU discovery usage:
>> > off lets OS decide on what to do (default).
>> > transparent disable PMTU discovery when transparent
>> support is enabled.
>> > always disable always PMTU discovery.
>> >
>> > In many setups of transparently intercepting proxies
>> Path-MTU
>> > discovery can not work on traffic towards the clients.
>> This is
>> > the case when the intercepting device does not fully
>> track
>> > connections and fails to forward ICMP must fragment
>> messages
>> > to the cache server. If you have such setup and
>> experience that
>> > certain clients sporadically hang or never complete
>> requests set
>> > disable-pmtu-discovery option to 'transparent'.
>> >
>> > but, that option is "unrecognized" by squid. Is it
>> really necessary to
>> > disable it on squid? If so, how?
>>
>> Strange. That option is accepted in all 3.0 and later
>> releases.
>>   http_port ... disable-pmtu-discovery=off
>>
>> Being the default it should not need to be set. But wont
>> hurt for
>> debugging.
>>
>>
> Amos.
>
> I've tried with both 3.0.24 and 3.1.9:
>
> 2010/11/14 20:57:24| cache_cf.cc(363) parseOneConfigFile: squid.conf:406
> unrecognized: 'disable-pmtu-discovery=off'
> optimum-router:/home/landysaccount# /usr/local/squid3/sbin/squid
>
> 2010/11/14 20:58:30| cache_cf.cc(363) parseOneConfigFile: squid.conf:406
> unrecognized: 'disable_pmtu_discovery=off'
>
>
> 2010/11/14 21:00:38| cache_cf.cc(363) parseOneConfigFile: squid.conf:406
> unrecognized: 'disable-pmtu-discovery'
>

Ah, it is a flag on http_port lines. Not a line by itself.
I don't think its related to the problem though. The details so far given
have been that the reply is broken and not being processed well. PMTU
breakage leads to a "zero sized reply" error.

> I'm going crazy with this hotmail problem can't get it working again. I
> had to disable squid and just forward all traffic, even though it works,
I
> need squid running in the middle.
>
> What do you suggest???
>

Can you grab a tcpdump of one of these failing replies please?

Amos
Received on Mon Nov 15 2010 - 01:27:09 MST