# Proxy\_bind pool

**URL:** <https://www.ruby-forum.com/t/proxy-bind-pool/244095>\
**Category:** NGINX\
**Created:** [February 19, 2016, 4:09am UTC](https://www.ruby-forum.com/t/proxy-bind-pool/244095 "2016-02-19T04:09:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\
**Post date:** [February 19, 2016, 4:09am UTC](https://www.ruby-forum.com/t/proxy-bind-pool/244095/1 "2016-02-19T04:09:52Z")

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Hi,

Is it possible to use proxy\_bind to a pool of IPs? Since each IP has a  
limited ephemeral ports that can be used to make outbound connections to  
upstream servers, it would be help if we can use a pool of IPs for  
proxy\_bind, or is there another workaround to have more connections to  
upstream server farm?

Thanks!  
Frank

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**Author:** ![fjlj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/f/e79b87/32.png) [@fjlj](https://www.ruby-forum.com/u/fjlj)\
**Post date:** [February 19, 2016, 10:50am UTC](https://www.ruby-forum.com/t/proxy-bind-pool/244095/2 "2016-02-19T10:50:35Z")

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Hi Frank,

On 2/19/16 6:09 AM, Frank L. wrote:

> Hi,
> 
> Is it possible to use proxy\_bind to a pool of IPs? Since each IP has  
> a limited ephemeral ports that can be used to make outbound  
> connections to upstream servers, it would be help if we can use a  
> pool of IPs for proxy\_bind, or is there another workaround to have  
> more connections to upstream server farm?

Yes, it’s possible – proxy\_bind supports variables (this support  
was added exactly for the use case above).

–  
Maxim K.