# 403 file not found error on IPv6 addition

**URL:** <https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291>\
**Category:** Uncategorized\
**Created:** [June 20, 2019, 7:23pm UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291 "2019-06-20T19:23:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![NoahMcNallie](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/noahmcnallie/32/696_2.png) [@NoahMcNallie](https://community.ntppool.org/u/NoahMcNallie)\
**Post date:** [June 20, 2019, 7:23pm UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291/1 "2019-06-20T19:23:16Z")

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I am receiving the following error while attempting to submit the IPv6 address `2402:9e80:0:1000::1:68d6’ for addition to the pools:

 ![image](https://us1.discourse-cdn.com/flex016/uploads/ntppool/original/1X/5b5081c7e291b4a4663f973dc0a6c1aa4d3b4d92.png)

Noah

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**Author:** ![NoahMcNallie](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/noahmcnallie/32/696_2.png) [@NoahMcNallie](https://community.ntppool.org/u/NoahMcNallie)\
**Post date:** [June 23, 2019, 4:31pm UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291/2 "2019-06-23T16:31:04Z")

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This issue seems to have been resolved.

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**Author:** ![ask](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/ask/32/907_2.png) [@ask](https://community.ntppool.org/u/ask)\
**Post date:** [June 25, 2019, 6:52am UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291/3 "2019-06-25T06:52:03Z")

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That’s pretty odd – you should only get that error if your cookie and the page is “out of sync”. Glancing at the code (that I wrote 12 years ago!), it can happen if between when you load the page and post the form you pass the 12-hour mark since your token was last cycled. … or if something else goes wrong I suppose!

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**Author:** ![alica](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/alica/32/337_2.png) [@alica](https://community.ntppool.org/u/alica)\
**Post date:** [June 25, 2019, 2:05pm UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291/4 "2019-06-25T14:05:30Z")

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Another way to invoke 404 on server management page:

1. Edit server netspeed using dropdown box
2. Then click on any of the server’s zone entry
3. The `www.ntppool.org` link will erroneously become `manage.ntppool.org` and fail, resulting 404

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**Author:** ![ask](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/ask/32/907_2.png) [@ask](https://community.ntppool.org/u/ask)\
**Post date:** [June 28, 2019, 4:53am UTC](https://community.ntppool.org/t/403-file-not-found-error-on-ipv6-addition/1291/5 "2019-06-28T04:53:47Z")

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> [@alica](#):
>
> Another way to invoke 404 on server management page:

Thank you for the detailed steps to reproduce. I fixed this on the [beta site](https://manage-beta.grundclock.com/).