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

[Timothy Spear <n614cd@xxxxxxxxx>]

Sergey,

I do not control the destination ports, my servers communicate to servers at other companies. In some cases, there are SFTP communications I must perform on 443.

Tim

On Oct 12, 2014, at 8:08 AM, Sergey Tsabolov ( aka linuxman ) <sergios@xxxxxxxxxxx> wrote:

Hello,
About ports for SSH I think the best way add SSH server running on 2222 or 4444 ports and not need to change the https 443 ports with ssh ports.
Is the simple way and not need the change the https way.

On 12/10/2014 02:48 πμ, 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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