Re: [squid-users] Reverse Proxy

Mario Remy Almeida wrote:
> Hi Amos,
>
> One thing I forgot to mentioned
>
> /etc/hosts has this entry
> 10.200.22.12 mail.airarabia.ae
>
> Output of " host mail.airarabia.ae " from dns is ->
> mail.airarabia.ae has address 10.200.9.20
>
>
> User (browser) reads the host file from individual PCs
> cat /etc/hosts | grep "mail.airarabia.ae"
> 10.200.22.49 mail.airarabia.ae
>
>
> 10.200.22.49 <- squid proxy ip
> 10.200.22.12 <- OWA ip

This could cause you some problems administering it.

My advice on this is to setup DNS pointing at Squid for the HTTPS domain
name, set squid.conf with the right OWA IP as a peer, and not have the
individual hosts file overrides.

The fact that the public IP for the domain is different to both the
squid IP and the real OWA/Exchange IP is worrying. I trust that you know
what destinations should be.

Amos

>
> Please find the answers below.
>
> //Remy
>
> On Sun, 2009-05-17 at 18:16 +1200, Amos Jeffries wrote:
>> Mario Remy Almeida wrote:
>>> Hi Amos,
>>>
>>> I followed the instruction as per
>>> http://wiki.squid-cache.org/ConfigExamples/Reverse/OutlookWebAccess
>>>
>>> But I am some how failing to configure https.
>>>
>>> My squid.conf
>>> ========================================================================
>>> https_port 443 defaultsite=mail.airarabia.ae \
>>> cert=/etc/squid/keys/cert.pem key=/etc/squid/keys/key.pem
>> Okay two extra things about the port:
>> 1) unless you have the wilcard cert its best to specify the IP:port
>> combo and generate the cert for those IP:port. That way you can use
>> other IP for other domains and be sure Squid is sending SSL on the right IP.
> changed it to ->
> https_port 10.200.22.49:443 defaultsite=mail.airarabia.ae \
> cert=/etc/squid/keys/cert.pem key=/etc/squid/keys/key.pem
>
>> 2) check that the cert/key are correct for the IP:port squid is
>> listening on.
>
> use this command to generate the ssl certificate
>
> openssl req -x509 -days 365 -newkey rsa:1024 -keyout key.pem -nodes
> \-out cert.pem
>

The keys do need to be signed in some way before they are valid for use.
This looks like a key creation-only command, though with SSL certs I
only know enough to follow the tutorials. Doing that (for all key steps)
I've never had a problem.

Amos

>
>>
>>> cache_peer 10.200.22.12 parent 80 0 no-query originserver login=PASS \
>>> front-end-https=on login=PASS name=owaServer
>> So OWA is listening on port 80?
> yes on port 80 no issue
>
>>> cache_peer_access owaServer allow OWA
>>> acl OWA dstdomain mail.airarabia.ae
>>> http_access allow OWA
>>> miss_access allow OWA
>>> miss_access deny all
>> Missing:
>> never_direct allow OWA
> Actually I forgot to mention it here
> It is specified in squid.conf
>
>> that bit is important to prevent Squid even attempting to request a
>> connection direct to OWA without the peerage settings.
>>
>> Amos
>>
>>> cache.log
>>> ========================================================================
>>> 2009/05/17 13:32:12| fwdNegotiateSSL: Error negotiating SSL connection \
>>> on FD 24: error:00000000:lib(0):func(0):reason(0) (5/-1/104)
>>> 2009/05/17 13:32:12| fwdNegotiateSSL: Error negotiating SSL connection \
>>> on FD 24: error:00000000:lib(0):func(0):reason(0) (5/-1/104)
>>> 2009/05/17 13:32:13| fwdNegotiateSSL: Error negotiating SSL connection \
>>> on FD 24: error:00000000:lib(0):func(0):reason(0) (5/-1/104)
>>>
>>> Error on the browser
>>> ========================================================================
>>> While trying to retrieve the URL: https://mail.airarabia.ae/exchweb/
>>>
>>> The following error was encountered:
>>>
>>> * Connection to 10.200.22.12 Failed
>>>
>>> The system returned:
>>>
>>> (71) Protocol error
>>>
>>> The remote host or network may be down. Please try the request again.
>>>
>>>
>>> Please help
>>>
>>> //Remy
>>>
>>>
>>> On Fri, 2009-05-15 at 16:35 +1200, Amos Jeffries wrote:
>>>> Mario Remy Almeida wrote:
>>>>> Hi All,
>>>>>
>>>>> Need to setup Reverse proxy
>>>>>
>>>>> I have
>>>>>
>>>>> Squid 2.7STABLE6
>>>>> OS Centos
>>>>>
>>>>> Web server= Microsoft Outlook Web Access
>>>>> SSL enabled
>>>>> port 443
>>>>>
>>>>>
>>>>> My squid config is as below
>>>>>
>>>>> acl vhosts1_domains dstdomain mail.airarabiauae.com
>>>>> http_port 443 accel defaultsite=mail.airarabiauae.com vhost
>>>>> cache_peer 10.200.22.12 parent 443 0 no-query originserver name=vhost1 \
>>>>> ssl
>>>>> cache_peer_access vhost1 allow vhosts1_domains
>>>>>
>>>>> Please someone tell me it that is the right way to configure it.
>>>>>
>>>> No. Here is the tutorial:
>>>>
>>>> http://wiki.squid-cache.org/ConfigExamples/Reverse/OutlookWebAccess
>>>>
>>>> port 443 is often encrypted. It requires the https_port option instead
>>>> of http_port, and the certificate as well.
>>>>
>>>> The peer part may be correct, or further ssl-related options may be
>>>> needed. It depends on your peer so I can't say for certain unless you
>>>> actually hit a problem.
>>>>
>>>>
>>>> Amos
>> Amos
>

Amos

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