# Nsd ipv6 issues

**URL:** <https://discourse.mailinabox.email/t/nsd-ipv6-issues/78>\
**Category:** Help with Setup/Upgrade\
**Created:** [September 21, 2014, 9:21am UTC](https://discourse.mailinabox.email/t/nsd-ipv6-issues/78 "2014-09-21T09:21:56Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fuess](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/f/3da27b/32.png) [@fuess](https://discourse.mailinabox.email/u/fuess)\
**Post date:** [September 21, 2014, 9:21am UTC](https://discourse.mailinabox.email/t/nsd-ipv6-issues/78/1 "2014-09-21T09:21:56Z")

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Hi, I keep having issues with ipv6 in nsd config. First reported here: [Update broke mailinabox](https://discourse.mailinabox.email/t/update-broke-mailinabox/34/)

Somehow the ipv6 line in nsd.conf breaks nsd. When I remove it, nsd works again. But each day according to schedule, the line is added again. The address that is in nsd.conf is **not** listed in `ifconfig`.

Don’t know if it’s normal, but `ifconfig` lists 9 ipv6 addresses for eth0.

What to do?

ps. i’m at [https://github.com/mail-in-a-box/mailinabox/commit/196e42e8b5c883d0b7c806378999343f0130ce17](https://github.com/mail-in-a-box/mailinabox/commit/196e42e8b5c883d0b7c806378999343f0130ce17)

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**Author:** ![JoshData](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/joshdata/32/2153_2.png) [@JoshData](https://discourse.mailinabox.email/u/JoshData)\
**Post date:** [September 21, 2014, 1:24pm UTC](https://discourse.mailinabox.email/t/nsd-ipv6-issues/78/2 "2014-09-21T13:24:51Z")

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Did something change? Maybe you’re on a network with dynamic IPv6 addressing? The IP address being put in nsd.conf is PRIVATE\_IPV6 in `/etc/mailinabox.conf`. You can either set it to nothingness or set it to another value that nsd likes.

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**Author:** ![fuess](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/f/3da27b/32.png) [@fuess](https://discourse.mailinabox.email/u/fuess)\
**Post date:** [September 22, 2014, 8:26am UTC](https://discourse.mailinabox.email/t/nsd-ipv6-issues/78/3 "2014-09-22T08:26:46Z")

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Alright, but the strange thing is that PRIVATE\_IPV6 in /etc/mailinabox.conf is not the one that is added each day in nsd.conf. I’ll try to make it empty, see what happens.

EDIT: my bad, I was looking at the PUBLIC\_IPV6. The ip addresses are matching indeed.