[squid-users] Squid Peek and splice
admin
admin at tisiz72.ru
Tue May 17 09:51:11 UTC 2016
get your blocked_https.txt
Reet Vyas писал 2016-05-17 14:47:
> Hi
>
> Below is my squid configuration
>
> Squid : 3.5.13
> OS ubuntu 14.04
>
> http_port 3128
> http_port 3127 intercept
> https_port 3129 intercept ssl-bump generate-host-certificates=on dynamic_cert_mem_cache_size=4MB cert=/etc/squid/ssl_certs/squid.crt key=/etc/squid/ssl_certs/squid.key cipher=ECDHE-RSA-RC4-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-SHA:DHE-RSA-CAMELLIA128-SHA:AES128-SHA:RC4-SHA:HIGH:!aNULL:!MD5:!ADH
>
> always_direct allow all
> sslproxy_cert_error allow all
> sslproxy_flags DONT_VERIFY_PEER
> acl blocked ssl::server_name "/etc/squid/blocked_https.txt"
> acl step1 at_step SslBump1
> ssl_bump peek step1
> ssl_bump terminate blocked
> ssl_bump splice all
> sslcrtd_program /usr/lib/squid/ssl_crtd -s /var/lib/squid/ssl_db -M 4MB
> sslcrtd_children 16 startup=1 idle=1
> sslproxy_capath /etc/ssl/certs
> sslproxy_cert_error allow all
> ssl_unclean_shutdown on
>
> I want to block facebook.com [1] so I have added url in .txt file.
>
> Its not blocking anything.
>
> Please let me know what I have to change in this configuration
>
> I getting below logs in squid
>
> 1463478160.585 551 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478160.585 550 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478161.147 562 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478161.147 561 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478163.982 553 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478163.982 552 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478163.994 565 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478163.994 564 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478184.338 182900 192.168.0.66 TAG_NONE/200 0 CONNECT 106.10.137.175:443 [4] - HIER_NONE/- -
> 1463478184.338 182898 192.168.0.66 TCP_TUNNEL/200 6040 CONNECT geo.query.yahoo.com:443 [5] - ORIGINAL_DST/106.10.137.175 [6] -
>
> 1463478194.373 61 192.168.0.66 TCP_MISS/204 233 GET http://www.gstatic.com/generate_204 - ORIGINAL_DST/216.58.199.163 [7] -
> 1463478209.166 240232 192.168.0.66 TAG_NONE/200 0 CONNECT 74.125.200.239:443 [8] - HIER_NONE/- -
> 1463478209.166 240231 192.168.0.66 TCP_TUNNEL/200 5603 CONNECT translate.googleapis.com:443 [9] - ORIGINAL_DST/74.125.200.239 [10] -
> 1463478209.200 240267 192.168.0.66 TAG_NONE/200 0 CONNECT 216.58.199.142:443 [11] - HIER_NONE/- -
> 1463478209.200 240266 192.168.0.66 TCP_TUNNEL/200 4962 CONNECT clients4.google.com:443 [12] - ORIGINAL_DST/216.58.199.142 [13] -
> 1463478213.443 181611 192.168.0.66 TAG_NONE/200 0 CONNECT 31.13.79.246:443 [14] - HIER_NONE/- -
> 1463478213.443 181611 192.168.0.66 TCP_TUNNEL/200 8547 CONNECT graph.facebook.com:443 [15] - ORIGINAL_DST/31.13.79.246 [16] -
> 1463478224.432 33 192.168.0.66 TCP_MISS/204 233 GET http://www.gstatic.com/generate_204 - ORIGINAL_DST/216.58.199.131 [17] -
> 1463478231.727 555 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478231.727 555 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478232.311 572 192.168.0.66 TAG_NONE/200 0 CONNECT 107.170.47.181:443 [2] - HIER_NONE/- -
> 1463478232.311 571 192.168.0.66 TAG_NONE/503 0 CONNECT freevideodownloader.co:443 [3] - HIER_NONE/- -
> 1463478246.369 13073 192.168.0.66 TAG_NONE/200 0 CONNECT 74.125.200.189:443 [18] - HIER_NONE/- -
> 1463478246.369 13072 192.168.0.66 TCP_TUNNEL/200 4546 CONNECT 0.client-channel.google.com:443 [19] - ORIGINAL_DST/74.125.200.189 [20] -
> 1463478246.369 13806 192.168.0.66 TAG_NONE/200 0 CONNECT 216.58.199.142:443 [11] - HIER_NONE/- -
> 1463478246.369 13805 192.168.0.66 TCP_TUNNEL/200 4604 CONNECT clients5.google.com:443 [21] - ORIGINAL_DST/216.58.199.142 [13] -
> 1463478265.935 119576 192.168.0.66 TAG_NONE/200 0 CONNECT 106.10.199.11:443 [22] - HIER_NONE/- -
> 1463478265.935 119576 192.168.0.66 TCP_TUNNEL/200 8586 CONNECT geo.yahoo.com:443 [23] - ORIGINAL_DST/106.10.199.11 [24] -
> 1463478327.555 41 192.168.0.66 TCP_MISS/200 2323 GET http://www.gstatic.com/chrome/crlset/3006/crl-set-delta-3005-260733898557562236.crx.data - ORIGINAL_DST/216.58.220.3 [25] text/html
>
> On Fri, May 13, 2016 at 4:37 PM, Amos Jeffries <squid3 at treenet.co.nz> wrote:
>
>> On 13/05/2016 5:58 p.m., Reet Vyas wrote:
>>> Hi Amos/Yuri,
>>>
>>> Currently my squid is configured with ssl bump, now I want to use peek and
>>> splice. I read in some forum that we don't need to install certificate on
>>> client's machine.
>>>
>>
>> Splice does not require it. But what you want to do with Squid may
>> prevent splice being used. So "it depends" ...
>>
>>> As I have already asked before in mailing list to install SSL certificate
>>> on Android devices, which is not working.
>>>
>>> So my question is If I want to use peek and splice for example I want https
>>> filtering for
>>
>> ... on how you define "filter".
>>
>>> proxy websites
>>
>> Not sure what you mean by that term.
>>
>>> and I dont want ssl for bank websites and
>>> facebook youtube and gmail. how will it work? Do i need to install SSL
>>> certifcate on client or not, I am bit confused with peek and splice thing.
>>
>> When you intercept port 443 normally only the raw-IP is available from
>> TCP. Peek allows Squid to get the server name the client was trying to
>> connect to out of the TLS. So that Squid can handle the intercepted
>> connection as if it had received a CONNECT message (which usually have
>> server/domain names).
>>
>> Splicing can be thought of as handling a intercepted port 443 connection
>> as if it were a CONNECT message, with no decryption. It is treated as a
>> single "thing", with some limited control possibilities.
>>
>> So...
>>
>> In order to bump (decrypt) some traffic and splice (not decrypt) other
>> traffic you need to have a way to decide which type is being dealt with.
>> That is the peek or stare actions - to get data out of the TLS handshake
>> for you to use in ACL decisions.
>>
>> You might now want to re-read the SslPeekAndSplice documentation again
>> to see if you understand it better. I skipped a lot of important details
>> to make the description clear.
>>
>>>
>>> Please let me know is that possible to configure squid 3.5.19 in such a way
>>> so that it will bump only proxy websites not FB youtube etc.
>>>
>>
>> Ah. So what are these "proxy websites" you speak of ?
>>
>> One thing you need to be clear about is that once the TCP packets enter
>> Squid they *have* to be "proxied". There is no way to undo TCP accept()
>> and read() operations. But there are many ways of handling them that
>> Squid can do.
>>
>> PS. you could post your existing config so we can suggest alterations to
>> it that will lead to it doing your new policy. That can be another way
>> to learn how the relevant-to-you part of the features work without
>> diving into the full complexity of what *might* be doable.
>>
>> Amos
>>
>> _______________________________________________
>> squid-users mailing list
>> squid-users at lists.squid-cache.org
>> http://lists.squid-cache.org/listinfo/squid-users
>
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Links:
------
[1] http://facebook.com
[2] http://107.170.47.181:443
[3] http://freevideodownloader.co:443
[4] http://106.10.137.175:443
[5] http://geo.query.yahoo.com:443
[6] http://106.10.137.175
[7] http://216.58.199.163
[8] http://74.125.200.239:443
[9] http://translate.googleapis.com:443
[10] http://74.125.200.239
[11] http://216.58.199.142:443
[12] http://clients4.google.com:443
[13] http://216.58.199.142
[14] http://31.13.79.246:443
[15] http://graph.facebook.com:443
[16] http://31.13.79.246
[17] http://216.58.199.131
[18] http://74.125.200.189:443
[19] http://0.client-channel.google.com:443
[20] http://74.125.200.189
[21] http://clients5.google.com:443
[22] http://106.10.199.11:443
[23] http://geo.yahoo.com:443
[24] http://106.10.199.11
[25] http://216.58.220.3
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