# Gem tcp port?

**URL:** <https://www.ruby-forum.com/t/gem-tcp-port/166522>\
**Category:** Ruby\
**Created:** [April 26, 2009, 9:20pm UTC](https://www.ruby-forum.com/t/gem-tcp-port/166522 "2009-04-26T21:20:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [April 26, 2009, 9:20pm UTC](https://www.ruby-forum.com/t/gem-tcp-port/166522/1 "2009-04-26T21:20:53Z")

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Hi,  
I’m using ruby on a machine behind a severely locked down firewall  
where all ports are closed by default, and I only open the ones I will  
need.

What port does gem run through please?

Steve

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<div class="post-metadata">

**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [April 26, 2009, 11:40pm UTC](https://www.ruby-forum.com/t/gem-tcp-port/166522/2 "2009-04-26T23:40:57Z")

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On Mon, Apr 27, 2009 at 04:20:04AM +0900,  
removed\_email\_address@domain.invalid wrote:

> Hi,  
> I’m using ruby on a machine behind a severely locked down firewall  
> where all ports are closed by default, and I only open the ones I will  
> need.
> 
> What port does gem run through please?

Port 80

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<div class="post-metadata">

**Author:** ![unknown](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/4bbf92/32.png) [@unknown](https://www.ruby-forum.com/u/unknown)\
**Post date:** [April 27, 2009, 10:44pm UTC](https://www.ruby-forum.com/t/gem-tcp-port/166522/3 "2009-04-27T22:44:28Z")

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On Apr 26, 2009, at 14:40, Aaron P. wrote:

> Port 80  
> And, it only downloads via port 80, it doesn’t open any ports by  
> default.

You can run `gem server` which will listen on 8808, but usually this  
is only for use on the local machine.