[TriLUG] blocking outbound port 22

[jon sack via TriLUG]

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      From: bak via TriLUG <trilug at trilug.org>
 To: William Sutton <william at trilug.org> 
Cc: Triangle Linux Users Group General Discussion <trilug at trilug.org> 
 Sent: Thursday, 8 October 2015, 15:44
 Subject: Re: [TriLUG] blocking outbound port 22
   
Yes indeed. Certainly it’s an issue where I find it easy to see both sides.

—bak



> On Oct 8, 2015, at 15:39, William Sutton <william at trilug.org> wrote:
> 
> some places take data seepage very seriously.  where I work, they've pushed out (via Windows GPO) software that automatically encrypts any USB keys that get plugged into a workstation.  Which kills transferring firmware from your PC to an appliance, but also keeps you from handing off sensitive information to someone less than trustworthy.
> 
> William Sutton
> 
> On Thu, 8 Oct 2015, bak via TriLUG wrote:
> 
>> Long ago in a far away land when I was but a nerdling, I was let go from a (rather terrible temporary) job for doing this.
>> 
>> These days I would have just used the data connection I carry around in my pocket all the time.
>> 
>> —bak
>> 
>>> On Oct 8, 2015, at 10:44, Matt Flyer via TriLUG <trilug at trilug.org> wrote:
>>> This sounds like a perfect place to test the application Corkscrew:
>>> http://www.techrepublic.com/blog/linux-and-open-source/using-corkscrew-to-tunnel-ssh-over-http/
>>> " If you are in an environment that disallows the use of SSH and forces
>>> the use of an HTTP proxy, it is possible to use that HTTP proxy as a
>>> transport for SSH."
>>> I worked at a place that was absurdly totalitarian with regards to their
>>> web proxy.  As a design engineer I would frequently research technical
>>> information and they would even block categorically university sites,
>>> where you can get a lot of technical papers, as "educational sites
>>> prohibited".
>>> Using SSH to tunnel out of there was the quick and obvious answer.
>>> Blocking port 22 simply makes the case for moving SSH to a non standard
>>> port, the old security through obscurity line.
>>>> port ssh , can be easily used for tunneling
>>>> I think, web proxy is in the blacklist for security reason.
>>>> On Wed, Oct 7, 2015 at 5:22 PM, Ken Mink via TriLUG <trilug at trilug.org>
>>>> wrote:
>>>>> Sent from my iPhone
>>>>>> On Oct 7, 2015, at 16:52, Wes Garrison via TriLUG <trilug at trilug.org>
>>>>> wrote:
>>>>>> I ran into a situation today I've never seen before.
>>>>>> I was working at an engineering firm and their IT guy had all outbound
>>>>>> traffic on port 22 blocked.
>>>>>> Is there any sane reason to do this?
>>>>>> I can't think of any reason to block SSH, but maybe I'm missing
>>>>> something.
>>>>>> -Wes
>>>>> Sure, internal security policies. One place I worked had ALL outbound
>>>>> traffic blocked. The only way out was web proxy, which also had quite
>>>>> the
>>>>> blacklist.
>>>>> Ken
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>> 
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