[squid-users] SSL issue on Squid version 4 after blacklisting

Alex Rousskov rousskov at measurement-factory.com
Mon Oct 19 18:30:30 UTC 2020 

On 10/19/20 1:16 PM, Eliezer Croitor wrote:

> To get a response you would need to respond in the Bugzilla.
> Maybe Alex might be able to answer some of your questions about the subject.

FWIW, the October 19 email from Ankit Dixit (quoted below) did not reach
me. It probably did not reach others on squid-users either because the
mailing list archive does not show it.

The short answer to that "what needs to be done" question is "serious
development". It is not a simple change, but we are making progress with it.

Alex.

  

> *From:* DIXIT Ankit <Ankit.Dixit at eurostar.com>
> *Sent:* Monday, October 19, 2020 3:11 PM
> *To:* Eliezer Croitor <ngtech1ltd at gmail.com>
> *Cc:* 'Squid Users' <squid-users at lists.squid-cache.org>
> *Subject:* RE: SSL issue on Squid version 4 after blacklisting
> 
>  
> 
> Elizer,
> 
>  
> 
>  1. I am not able to identify from below like what exactly needs to be
>     done and in which file?
> 
>  
> 
> * Short-term: Essentially disable OpenSSL built-in certificate
> validation (for certificates with missing intermediate CAs) and perform
> that validation from Squid, using X509_verify_cert(), after
> SSL_connect() returns control to Squid and Squid fetches the missing
> CAs. This approach still requires some non-trivial Squid development and
> keeping an eye on OpenSSL built-in validation logic, but it can be
> completed without OpenSSL modifications and, IMHO, without replicating a
> lot of OpenSSL internal validation logic.
> 
>  
> 
> * Long-term: We need a new OpenSSL callback for pausing OpenSSL
> processing after TLS v1.3 server handshake is decrypted and before
> certificate validation starts.
> 
>  
> 
>  2. Apart from above, I want to also understand if we have below
>     configuration in Squid version 3.5 in squid.conf then how would I
>     replace and to what ,if we move to Squid version 4.12
> 
>  
> 
> sslproxy_cipher
> HIGH:MEDIUM:!RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS
> 
> sslproxy_options NO_SSLv2,NO_SSLv3,SINGLE_ECDH_USE
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* Eliezer Croitor <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>
> *Sent:* Monday, October 12, 2020 12:38 PM
> *To:* DIXIT Ankit <Ankit.Dixit at eurostar.com
> <mailto:Ankit.Dixit at eurostar.com>>
> *Cc:* 'Squid Users' <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Subject:* RE: SSL issue on Squid version 4 after blacklisting
> 
>  
> 
>  
> 
> Hey Dixit,
> 
>  
> 
> Have you seen the next bug report:
> 
> https://bugs.squid-cache.org/show_bug.cgi?id=5067#c4
> 
>  
> 
> Alex/Amos: I assume that this specific issue deserve a DEBUG which will
> describe and relate to this BUG:5067 report.
> 
>  
> 
> Eliezer
> 
>  
> 
> ----
> 
> Eliezer Croitoru
> 
> Tech Support
> 
> Mobile: +972-5-28704261
> 
> Email: ngtech1ltd at gmail.com <mailto:ngtech1ltd at gmail.com>
> 
>  
> 
> *From:* DIXIT Ankit <Ankit.Dixit at eurostar.com
> <mailto:Ankit.Dixit at eurostar.com>>
> *Sent:* Friday, September 25, 2020 4:22 PM
> *To:* Eliezer Croitor <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>; 'Squid Users'
> <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Subject:* RE: SSL issue on Squid version 4 after blacklisting
> 
>  
> 
> Elizer/Team,
> 
>  
> 
> Any help would be appreciated.
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* DIXIT Ankit
> *Sent:* Tuesday, September 15, 2020 1:24 PM
> *To:* Eliezer Croitor <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>; 'Squid Users'
> <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Subject:* SSL issue on Squid version 4 after blacklisting
> 
>  
> 
> *_Subject changed_*
> 
> * *
> 
> Elizer/Team,
> 
>  
> 
> Connecting with you again after we upgraded to Squid version 4.
> 
>  
> 
> We have blacklisted the domain categories  on Squid Proxy, but we are
> getting below exception in cache.log and due to this internet is not
> flowing from client servers via squid.
> 
> This blacklist category is having thousands of blacklisted domains.
> 
>  
> 
> kid1| Error negotiating SSL on FD 33: error:14090086:SSL
> routines:ssl3_get_server_certificate:certificate verify failed (1/-1/0)
> 
> kid1| Error negotiating SSL connection on FD 26: (104) Connection reset
> by peer
> 
>  
> 
> Is there any specific ssl certificate, we need to configure? Or any
> other issue, you see here?
> 
>  
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* DIXIT Ankit
> *Sent:* Monday, July 6, 2020 8:50 AM
> *To:* Eliezer Croitor <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>; 'Squid Users'
> <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Subject:* RE: [squid-users] Squid memory consumption problem
> 
>  
> 
> Elizer,
> 
>  
> 
> SSL was failing for few applications but was working fine for other
> applications. So we reverted back to old version.
> 
> I am not sure what ssl certificate dependency was there.
> 
>  
> 
> Would be great, if you can suggest memory leak solutions in 3.12 version.
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* Eliezer Croitor <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>
> *Sent:* Sunday, July 5, 2020 5:58 PM
> *To:* DIXIT Ankit <Ankit.Dixit at eurostar.com
> <mailto:Ankit.Dixit at eurostar.com>>; 'Squid Users'
> <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Cc:* SETHI Konica <Konica.Sethi at eurostar.com
> <mailto:Konica.Sethi at eurostar.com>>
> *Subject:* RE: [squid-users] Squid memory consumption problem
> 
>  
> 
>  
> 
> Hey,
> 
>  
> 
> What happen with this issue?
> 
> I am waiting for any input about this issue to understand with what I
> can try to help.
> 
>  
> 
> Eliezer
> 
>  
> 
> ----
> 
> Eliezer Croitoru
> 
> Tech Support
> 
> Mobile: +972-5-28704261
> 
> Email: ngtech1ltd at gmail.com <mailto:ngtech1ltd at gmail.com>
> 
>  
> 
> *From:*DIXIT Ankit [mailto:Ankit.Dixit at eurostar.com]
> *Sent:* Tuesday, June 30, 2020 12:35 PM
> *To:* Eliezer Croitoru; Squid Users
> *Cc:* SETHI Konica
> *Subject:* RE: [squid-users] Squid memory consumption problem
> 
>  
> 
> For your information, we have added below configurations but again same
> issue.
> 
>  
> 
> tls_outgoing_options options=NO_SSLv3,SINGLE_DH_USE,SINGLE_ECDH_USE
> 
>  
> 
> tls_outgoing_options
> cipher=HIGH:MEDIUM:!RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* DIXIT Ankit
> *Sent:* Tuesday, June 30, 2020 10:25 AM
> *To:* Eliezer Croitoru <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>; Squid Users
> <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>
> *Cc:* SETHI Konica <Konica.Sethi at eurostar.com
> <mailto:Konica.Sethi at eurostar.com>>
> *Subject:* RE: [squid-users] Squid memory consumption problem
> 
>  
> 
> Eliezer,
> 
>  
> 
> Clients are facing some SSL related issues after upgrade. I could see
> below error. Please suggest, its little urgent.
> 
>  
> 
> quid[6706]: Error negotiating SSL connection on FD 167:
> error:00000001:lib(0):func(0):reason(1) (1/0)
> Jun 30 09:17:38 squid[6706]: Error parsing SSL Server Hello Message on FD 77
> Jun 30 09:17:38 squid[6706]: Error negotiating SSL connection on FD 75:
> error:00000001:lib(0):func(0):reason(1) (1/0)
> 
>  
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
> *From:* Eliezer Croitoru <ngtech1ltd at gmail.com
> <mailto:ngtech1ltd at gmail.com>>
> *Sent:* Tuesday, June 30, 2020 9:10 AM
> *To:* Squid Users <squid-users at lists.squid-cache.org
> <mailto:squid-users at lists.squid-cache.org>>; DIXIT Ankit
> <Ankit.Dixit at eurostar.com <mailto:Ankit.Dixit at eurostar.com>>
> *Subject:* RE: [squid-users] Squid memory consumption problem
> 
>  
> 
>  
> 
> The first thing to do is look at:
> 
> https://wiki.squid-cache.org/KnowledgeBase/HostHeaderForgery
> 
>  
> 
> It should clear couple doubts for you.
> 
>  
> 
> Eliezer
> 
>  
> 
> ----
> 
> Eliezer Croitoru
> 
> Tech Support
> 
> Mobile: +972-5-28704261
> 
> Email: ngtech1ltd at gmail.com <mailto:ngtech1ltd at gmail.com>
> 
>  
> 
> *From: *DIXIT Ankit <mailto:Ankit.Dixit at eurostar.com>
> *Sent: *Tuesday, June 30, 2020 10:46 AM
> *To: *Eliezer Croitoru <mailto:ngtech1ltd at gmail.com>; Alex Rousskov
> <mailto:rousskov at measurement-factory.com>;
> squid-users at lists.squid-cache.org <mailto:squid-users at lists.squid-cache.org>
> *Subject: *RE: [squid-users] Squid memory consumption problem
> 
>  
> 
> Elizer,
> 
>  
> 
> We installed Squid 4.12 on production server, amazon Linux 2,
> successfully but I could see below messages in the logs for SECURITY
> ALERT: Host header forgery detected. These are getting generated very
> frequently.
> 
> Can we ignore this Or is it advised to suppress these alerts?
> 
>  
> 
> kid2| SECURITY ALERT: on URL: 5-25-3-app.agent.datadoghq.com:443
> <http://5-25-3-app.agent.datadoghq.com:443>
> 
> 2020/06/30 07:41:29 kid1| SECURITY ALERT: Host header forgery detected
> on local=IP remote=IP FD 97 flags=33 (local IP does not match any domain IP)
> 
>  
> 
> *Regards,*
> 
> *Ankit Dixit|IS Cloud Team*
> 
> *Eurostar International Ltd*
> 
> *Times House | Bravingtons Walk | London N1 9AW*
> 
> *Office: +44 (0)207 84 35550 (Extension– 35530)*
> 
>  
> 
>  
> 
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>  
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>  
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>  
> 
>  
> 
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> This email (including any attachments) is intended only for the
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