# Which DNS Server?

**URL:** <https://discourse.mailinabox.email/t/which-dns-server/4904>\
**Category:** meta\
**Created:** [April 26, 2019, 2:38am UTC](https://discourse.mailinabox.email/t/which-dns-server/4904 "2019-04-26T02:38:51Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Eliter](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/e/74df32/32.png) [@Eliter](https://discourse.mailinabox.email/u/Eliter)\
**Post date:** [April 26, 2019, 2:38am UTC](https://discourse.mailinabox.email/t/which-dns-server/4904/1 "2019-04-26T02:38:51Z")

</div>

I have seen several security vulnerabilities regarding Bind9, which is a DNS server. I wanted to know if Mail-in-a-Box uses Bind9, or which DNS server it uses, since I am wanting to post relevant security vulnerabilities on the forum.

Would you happen to know, @alento, @murgero, @JoshData?

---

<div class="post-metadata">

**Author:** ![murgero](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/murgero/32/750_2.png) [@murgero](https://discourse.mailinabox.email/u/murgero)\
**Post date:** [April 26, 2019, 2:49am UTC](https://discourse.mailinabox.email/t/which-dns-server/4904/2 "2019-04-26T02:49:55Z")

</div>

AFAIK MIAB uses NSD.

---

<div class="post-metadata">

**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:** [April 26, 2019, 12:22pm UTC](https://discourse.mailinabox.email/t/which-dns-server/4904/3 "2019-04-26T12:22:24Z")

</div>

We use `nsd` as the public, non-recursive nameserver (i.e. the service that lets other systems resolve the domains hosted on the box) _and_ also `bind9` as a private, recursive, DNSSEC-enabled nameserver (i.e. when the box has to look up domains in order to send outgoing mail).