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Re: Require SSL version 3

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Amos,

When I added the option=NO_SSLv2,NO_SSLv3 lines and tried to start squid, 
I got a fatal error.  It said something about the syntax being wrong on 
the line.  I took the lines out and tried to start squid and my swap file 
got corrupted.    I had to rename the swap file and let squid create a new 
one. Then it started.  Phew!!

Any reason why it wouldn't let me put in the option line?   I stuck right 
at the end of the https_port line right after the key= definition.

Thanks,

Jack Siergiej




Amos Jeffries <squid3@xxxxxxxxxxxxx> 
01/15/2008 07:41 AM

To
JSiergiej@xxxxxxxxxxxxxxxx
cc
squid-users@xxxxxxxxxxxxxxx
Subject
Re:  Require SSL version 3






JSiergiej@xxxxxxxxxxxxxxxx wrote:
> 
> Amos,
> 
> I am not running the version=  on any of the sites right now, I only 
> included the version= in the provided code so you can see where I placed 

> it and see if there was anything wrong with how I did it.  So, answering 

> your first question, the outside test is talking about all of the sites.
> 
> In terms of further info for the version not working, when I place it in 

> my code and launch squid and try to go to the https portion of the site, 

> my browser (firefox) told me that the transmission was interrupted.  In 
> the squid terminal window, I get the following:
> 
> clientNegotiateSSL: Error negotiating SSL connection on FD 22: error 
> 1408A09F: SSL routines: SSL3_Get_Client_Hello: length mismatch (1/-1)
> clientNegotiateSSL: Error negotiating SSL connection on FD 22: 
> error:1408F10B: SSL routines: SSL3_Get_Record: wrong version number 
(1/-1)
> 
> I have not tried the option=NO_SSLv2,NO_SSLv1.  That will be my next 
move.
> 
> In terms of the upgrade to Squid 2.6STABLE17+ or 3.0STABLE1+, is it an 
> easy upgrade or is there alot of configuration involved?

Relatively easy upgrade config-wise. I did not see anything in your 
posted lines which was deprecated in 2.6 and killed in 3.0.

There is a short list if you have further config at
http://www.squid-cache.org/Versions/v3/3.0/RELEASENOTES.html#modifiedtags

Amos

> 
> Thanks,
> 
> Jack Siergiej
> 
> 
> 
> 
> *Amos Jeffries <squid3@xxxxxxxxxxxxx>*
> 
> 01/15/2008 02:43 AM
> 
> 
> To
>                JSiergiej@xxxxxxxxxxxxxxxx
> cc
>                squid-users@xxxxxxxxxxxxxxx
> Subject
>                Re:  Require SSL version 3
> 
> 
> 
> 
> 
> 
> 
> 
> JSiergiej@xxxxxxxxxxxxxxxx wrote:
>  > Hello all,
>  >
>  > I have a client that is requiring the use of only SSL version 3 for 
> their
>  > websites.   When a vulnerability scan is done by an outside firm 
against
>  > squid, the report states that SSLV2 is allowed and we can't have 
that.
> 
> Firstly, I see several HTTPS address/port open in the config below.
> Several do not have a version= limit set on them. Are you certain the
> outside test report is not talking about one of those?
> 
>  >
>  > I went to the
>  > http://www.squid-cache.org/Versions/v2/2.6/cfgman/https_port.html 
> page and
>  > tried appending the option "version=3" to the end of my https_port 
line
>  > for one of the sites (see below), but after I do this, I cannot view 
the
>  > https portion of the site.  It tells me that the page was 
> interrupted. If
>  > I remove the version=3 line, I am fine.
>  >
>  > What do I need to do to make each of the sites below only accept 
SSLV3
>  > connections?  Any help would be appreciated.
> 
> version not working is a bug. Any further info you can provide would be
> welcome in tracking it down
> 
> Secondly, for your production use there are also appear to be the
> alternatives:
>   https_port ... option=NO_SSLv2,NO_SSLv1
> 
>  >
>  > # Run Squid in virtual host mode
>  > http_port 80 vhost
>  >
>  > # Client1 reverse proxy config
>  > https_port 172.16.0.107:443 protocol=https vhost
>  > cert=/usr/local/squid/etc/devstore.pem
>  > key=/usr/local/squid/etc/devstore.key version=3
>  > cache_peer 192.168.0.7 parent 80 0 no-query originserver
>  > name=store.client1.com
>  > #acl client1 dstdomain store.client1.com
>  > acl client1 dstdomain xxx.xxx.xxx.xxx store.client1.com
>  > http_access allow client1
>  > cache_peer_access store.client1.com allow client1
>  >
>  >
>  > # Client2 reverse proxy config
>  > https_port 172.16.0.111:443 protocol=https
>  > cert=/usr/local/squid/etc/ctccert.pem 
> key=/usr/local/squid/etc/ctccert.key
>  > vhost
> 
> no version= there...
> 
>  > cache_peer 192.168.0.11 parent 80 0 no-query originserver
>  > name=store.client2.com
>  > acl client2 dstdomain xxx.xxx.xxx.xxx store.client2.com
>  > http_access allow client2
>  > cache_peer_access store.client2.com allow client2
>  >
>  > # Client3 reverse proxy config
>  > https_port 172.16.0.105:443 protocol=https
>  > cert=/usr/local/squid/etc/devstore.pem
>  > key=/usr/local/squid/etc/devstore.key vhost
> 
> And another missing the version.
> 
>  > cache_peer 192.168.0.05 parent 80 0 no-query originserver
>  > name=store.client3.com
>  > acl client3 dstdomain store.client3.com
>  > http_access allow client3
>  > cache_peer_access store.client3.com allow client3
>  >
>  > # Client4 reverse proxy config
>  > https_port 172.16.0.106:443 protocol=https
>  > cert=/usr/local/squid/etc/cycert.pem 
key=/usr/local/squid/etc/cycert.key
>  > vhost
> 
> And another missing the version.
> 
>  > cache_peer 192.168.0.06 parent 80 0 no-query originserver
>  > name=store.client4.com
>  > acl client4 dstdomain store.client4.com
>  > http_access allow client4
>  > cache_peer_access store.client4.com allow client4
>  >
>  > # Client5 reverse proxy config
>  > https_port 172.16.0.120:443 protocol=https
>  > cert=/usr/local/squid/etc/opaccess.pem
>  > key=/usr/local/squid/etc/opaccess.key vhost
> 
> And another missing the version.
> 
>  > cache_peer 192.168.0.20 parent 443 0 no-query originserver ssl
>  > name=store.client5.com
>  > acl client5 dstdomain store.client5.com
>  > http_access allow client5
>  > cache_peer_access store.client5.com allow client5
>  >
>  >
>  >
>  > # --- Begin default config options --- #
>  >
>  > hierarchy_stoplist cgi-bin ?
>  >
>  > acl QUERY urlpath_regex cgi-bin \?
>  > cache deny QUERY
>  >
>  > acl apache rep_header Server ^Apache
>  > broken_vary_encoding allow apache
>  >
>  > access_log /usr/local/squid/var/logs/access.log squid
>  >
>  > refresh_pattern ^ftp:           1440    20%     10080
>  > refresh_pattern ^gopher:        1440    0%      1440
>  > refresh_pattern .               0       20%     4320
>  >
>  > acl all src 0.0.0.0/0.0.0.0
>  > acl manager proto cache_object
>  > acl localhost src 127.0.0.1/255.255.255.255
>  > acl to_localhost dst 127.0.0.0/8
>  > acl SSL_ports port 443
>  > acl Safe_ports port 80          # http
>  > acl Safe_ports port 21          # ftp
>  > acl Safe_ports port 443         # https
>  > acl Safe_ports port 70          # gopher
>  > acl Safe_ports port 210         # wais
>  > acl Safe_ports port 1025-65535  # unregistered ports
>  > acl Safe_ports port 280         # http-mgmt
>  > acl Safe_ports port 488         # gss-http
>  > acl Safe_ports port 591         # filemaker
>  > acl Safe_ports port 777         # multiling http
>  > acl CONNECT method CONNECT
>  > acl TRACE method TRACE
>  >
>  > # Deny HTTP TRACE method
>  > http_access deny TRACE
>  > # Only allow cachemgr access from localhost
>  > http_access allow manager localhost
>  > http_access deny manager
>  > # Deny requests to unknown ports
>  > http_access deny !Safe_ports
>  > # Deny CONNECT to other than SSL ports
>  > http_access deny CONNECT !SSL_ports
>  > # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
>  >
>  > # And finally deny all other access to this proxy
>  > http_access deny all
>  >
>  > # and finally allow by default
>  > http_reply_access allow all
>  >
>  > #Allow ICP queries from everyone
>  > icp_access allow all
>  >
>  > # Leave coredumps in the first cache dir
>  > coredump_dir /usr/local/squid/var/cache
>  >
>  > Thanks,
>  >
>  > Jack Siergiej
>  >
> 
> 
> -- 
> Please use Squid 2.6STABLE17+ or 3.0STABLE1+
> There are serious security advisories out on all earlier releases.
> 


-- 
Please use Squid 2.6STABLE17+ or 3.0STABLE1+
There are serious security advisories out on all earlier releases.



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