# CONFIG REFUSE on flood

**URL:** <https://discourse.pi-hole.net/t/config-refuse-on-flood/47513>\
**Category:** Community Help\
**Created:** [June 7, 2021, 1:13pm UTC](https://discourse.pi-hole.net/t/config-refuse-on-flood/47513 "2021-06-07T13:13:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Matteo\_Fabbroni](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/matteo_fabbroni/32/25670_2.png) [@Matteo\_Fabbroni](https://discourse.pi-hole.net/u/Matteo_Fabbroni)\
**Post date:** [June 7, 2021, 1:13pm UTC](https://discourse.pi-hole.net/t/config-refuse-on-flood/47513/1 "2021-06-07T13:13:55Z")

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**The issue I am facing:**  
I've used pihole for years as DNS filter. Since last upgrade, when a host make a lot of dns queries in the unit time, after a while he gets "REFUSED" when trying to resolve.  
My problem is that the host is an http proxy server with ~ 2000 clients and so it has to do tons of DNS queries: this problems occurs only since last update:

**Pi-hole** [v5.3.1](https://github.com/pi-hole/pi-hole/releases/v5.3.1)

- **Web Interface** [v5.5](https://github.com/pi-hole/AdminLTE/releases/v5.5)  
**FTL** [v5.8.1](https://github.com/pi-hole/FTL/releases/v5.8.1)

**Details about my system:**  
The host providing DNS filtering is an ubuntu 18.04.

Thanks in advance for any help: I really need it to get back working!  
**What I have changed since installing Pi-hole:**  
Nothing, just upgraded.

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**Author:** ![Bucking\_Horn](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/bucking_horn/32/18719_2.png) [@Bucking\_Horn](https://discourse.pi-hole.net/u/Bucking_Horn)\
**Post date:** [June 7, 2021, 5:11pm UTC](https://discourse.pi-hole.net/t/config-refuse-on-flood/47513/2 "2021-06-07T17:11:29Z")

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Your observation matches the rate limiting behaviour as documented in the release notes for [Pi-hole FTL v5.7 and Web v5.4 released](https://discourse.pi-hole.net/t/pi-hole-ftl-v5-7-and-web-v5-4-released/44449).

For configuration options, please study those release notes and refer to Pi-hole's [`RATE_LIMIT` documentation](https://docs.pi-hole.net/ftldns/configfile/#rate_limit).

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**Author:** ![system](https://discourse.pi-hole.net/uploads/default/original/3X/7/c/7c8792f649eeb921c5d2b4c41564ffa873d9a2b8.png) [@system](https://discourse.pi-hole.net/u/system)\
**Post date:** [June 28, 2021, 5:11pm UTC](https://discourse.pi-hole.net/t/config-refuse-on-flood/47513/3 "2021-06-28T17:11:50Z")

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