Re: SSL/SSH/SFTP/FTPS to alternate ports

Timothy Spear <n614cd@xxxxxxxxx> · Sun, 12 Oct 2014 11:33:43 -0400

B,
I was going to attach the logs, but I now feel like an idiot. :D
The jump box I am running Squid on, currently only allows 80 and 443 outbound. I recalled this when I went to scp the log files and the connection was refused....
I detest overlooking things like this. Sometimes, you really need question any assumptions.

Tim

On Oct 12, 2014, at 11:11 AM, crazy world <crazyworld@xxxxxxxxxxx> wrote:

Do you have the log for the connection when you can't access? Other than 22 and 443 as you said.

Thanks,

-B

Subject: Re:  SSL/SSH/SFTP/FTPS to alternate ports
From: n614cd@xxxxxxxxx
Date: Sun, 12 Oct 2014 10:49:05 -0400
CC: n614cd@xxxxxxxxx; squid-users@xxxxxxxxxxxxxxxxxxxxx
To: crazyworld@xxxxxxxxxxx

Here is the access log. I should have included it in the original post. This is accessing a test machine I setup to hit SSH on 22 and 443. I can also hit HTTPS on multiple other ports.
1413125068.706     87 10.110.98.21 TCP_MISS/503 0 CONNECT XXX.XXXX.com:22 - HIER_NONE/- -
1413125086.496   8061 10.110.98.21 TCP_MISS/200 3657 CONNECT XXX.XXXX.com:443 - HIER_DIRECT/54.68.15.208 -

Yes, my intent in the rule set is to provide a list of allowed ports and sites. 

Tim

On Oct 11, 2014, at 11:37 PM, B <crazyworld@xxxxxxxxxxx> wrote:

check out your access log seeing what it says. Sounds like you are looking for an AFW from squid. The ports themselves are defined. You need to make sure the other ports are opened.

Your rule tells squid to block the non-allowed sites to the non-allowed ports. Still sounds like FW function, but with the domain feature only.

-B
On 10/12/2014 7:48 AM, Timothy Spear wrote:
Hello,

Here is the issue:
I can proxy through Squid just fine to HTTP and HTTPS. I can also run SSH via Corkscrew to a SSH server running on port 443 and it works fine.
What I cannot do, is access HTTPS or SSH on any other port except 443. I have lost track of the number of things I have tried so any help will be appreciated and I feel like I am missing something simple. 
OS: Ubuntu 14.04.1 LTS
Squid: 3.3.8-1ubuntu6.1

Here is my current Squid 3 configuration:

debug_options all,3

# local network we proxy for
acl localnet src 10.110.98.0/24

# what ports can be the desitnation
acl allowedPorts port 21
acl allowedPorts port 22
acl allowedPorts port 2222
acl allowedPorts port 80
acl allowedPorts port 443
acl allowedPorts port 8443

acl CONNECT method CONNECT

# determine the available sites
acl allowedSites dstdomain "/etc/squid3/allowed-sites.squid"

# now block anything not on the localnet or ports
http_access deny !localnet

# allow connect only for approved ports
http_access deny CONNECT !allowedPorts

# now only allow to the specific sites
http_access allow localnet allowedSites allowedPorts

http_port 3128
access_log /var/log/squid3/access.log squid
hosts_file /etc/hosts

Background (just FYI):
I am trying to setup Squid to control network access from a local subnet to a select number of domains. I do not need to bump the encrypted traffic and play man in the middle, I just need to prevent the servers on the local network from accessing unauthorized networks. Yes, I know I can do this in the Firewall, but that is IP based and I am dealing with enough other companies that maintaining the IP list has become a major pain. Instead I want to use domains, which I can do in Squid.

Thanks,

Tim

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