# Rack::Request:Class undefined method error
**URL:** https://meta.discourse.org/t/rack-class-undefined-method-error/105458
**Category:** Development
**Created:** [January 2, 2019, 9:49am UTC](https://meta.discourse.org/t/rack-class-undefined-method-error/105458 "2019-01-02T09:49:13Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@sau226](https://meta.discourse.org/u/sau226)
#### Post date: [January 2, 2019, 9:49am UTC](https://meta.discourse.org/t/rack-class-undefined-method-error/105458/1 "2019-01-02T09:49:13Z")
Continuing the discussion from [IP addresses are not correct in my installation](https://meta.discourse.org/t/ip-addresses-are-not-correct-in-my-installation/105366/7):
I am currently getting an error from discourse when I try to rebuild on my staging (I use it for dev but its installed using the production install guide) instance. I’ve narrowed it down to a plugin I’m currently working on.
The source code for the plugin is publicly available [here](https://github.com/sau226dev/discourse-plugin-internalip) and the error message is available [here](https://pastebin.com/bsszSMRU).
How might I go about loading rack in a manner that allows me to set `Rack::Request.ip_filter = lambda { |ip| false }` and override the rack default?
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### Author:  [@sam](https://meta.discourse.org/u/sam)
#### Post date: [January 2, 2019, 7:43pm UTC](https://meta.discourse.org/t/rack-class-undefined-method-error/105458/2 "2019-01-02T19:43:00Z")
[https://github.com/rack/rack/commit/906c8c04a049de14042f289ffe46ed45978f2e9b#diff-345b5336fcb3ce47a50decd2176d79e8](https://github.com/rack/rack/commit/906c8c04a049de14042f289ffe46ed45978f2e9b#diff-345b5336fcb3ce47a50decd2176d79e8)
Looks like you need to monkey patch trusted proxy till we get this rack commit