# Fiddler & Proxy

**URL:** <https://forum.inductiveautomation.com/t/fiddler-proxy/4366>\
**Category:** Ignition\
**Created:** [April 27, 2012, 2:06pm UTC](https://forum.inductiveautomation.com/t/fiddler-proxy/4366 "2012-04-27T14:06:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bryan\_cook](https://avatars.discourse-cdn.com/v4/letter/b/a8b319/32.png) [@bryan\_cook](https://forum.inductiveautomation.com/u/bryan_cook)\
**Post date:** [April 27, 2012, 2:06pm UTC](https://forum.inductiveautomation.com/t/fiddler-proxy/4366/1 "2012-04-27T14:06:57Z")

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I’m trying to use Fiddler with Ignition to monitor some traffic I’ve got going back and forth with a web service, (communications happen from a Gateway module I’ve developed). I’ve [read](http://stackoverflow.com/a/7435339/96728) that I can use the following …`-Dhttp.proxyHost=localhost
-Dhttp.proxyPort=8888`… as VM arguments. Can I utilize these somewhere within ignition.conf safely or is their another, preferred approach to what I’m trying to accomplish?

Thanks!

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [April 27, 2012, 2:11pm UTC](https://forum.inductiveautomation.com/t/fiddler-proxy/4366/2 "2012-04-27T14:11:03Z")

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I imagine you can use these safely under the “Java Additional Parameters” of ignition.conf. Obviously these settings are JVM-wide, so if another module comes along and starts looking at those one day you may have a problem, but I don’t think Ignition ever looks at either of those properties.

That being said… I can’t exactly say for sure everything is going to work 😉

Edit: Looked closer; you’re telling Java to use a http proxy. Interesting. I can only think of a handful of outgoing HTTP requests the gateway makes, and I guess there should be no problem with them going through a proxy?

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**Author:** ![bryan\_cook](https://avatars.discourse-cdn.com/v4/letter/b/a8b319/32.png) [@bryan\_cook](https://forum.inductiveautomation.com/u/bryan_cook)\
**Post date:** [April 27, 2012, 2:14pm UTC](https://forum.inductiveautomation.com/t/fiddler-proxy/4366/3 "2012-04-27T14:14:51Z")

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Thanks Kevin, I’ll be giving it a go later this afternoon, will reply with how it goes. I figured I’d throw this post up now to potentially save me some digging/troubleshooting later.