# Pac - proxy auto configuration

**URL:** <https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822>\
**Category:** development\
**Created:** [January 29, 2018, 12:24pm UTC](https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822 "2018-01-29T12:24:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![YafimK](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/yafimk/32/365_2.png) [@YafimK](https://discourse.mitmproxy.org/u/YafimK)\
**Post date:** [January 29, 2018, 12:24pm UTC](https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822/1 "2018-01-29T12:24:30Z")

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Hi,  
Is there any plan to support PAC as upstream proxy feature?

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**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [January 29, 2018, 3:57pm UTC](https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822/2 "2018-01-29T15:57:36Z")

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Hi,

Not exactly sure what you are looking for in mitmproxy here, but we definitely have nothing planned with regard to PAC files.

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**Author:** ![YafimK](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/yafimk/32/365_2.png) [@YafimK](https://discourse.mitmproxy.org/u/YafimK)\
**Post date:** [January 30, 2018, 7:02am UTC](https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822/3 "2018-01-30T07:02:53Z")

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Hi,  
well as far as i understand - if I’m behind corporate proxy, I need to define it as ‘upstream proxy’ in the cmd arguments given to mitmdump. There are cases where such proxies are resolved using PAC scripts.

And thanks.

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**Author:** ![mhils](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/mhils/32/7_2.png) [@mhils](https://discourse.mitmproxy.org/u/mhils)\
**Post date:** [January 30, 2018, 6:14pm UTC](https://discourse.mitmproxy.org/t/pac-proxy-auto-configuration/822/4 "2018-01-30T18:14:03Z")

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That would require us to embed a JS interpreter, which frankly speaking will not happen.

I consider that to be a problem of your system administrators, not of ours.