# Vaulthardening against brutforce attacks

**URL:** <https://vaultwarden.discourse.group/t/vaulthardening-against-brutforce-attacks/3091>\
**Category:** Help\
**Created:** [November 14, 2023, 8:42pm UTC](https://vaultwarden.discourse.group/t/vaulthardening-against-brutforce-attacks/3091 "2023-11-14T20:42:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![codingguy32](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@codingguy32](https://vaultwarden.discourse.group/u/codingguy32)\
**Post date:** [November 14, 2023, 8:42pm UTC](https://vaultwarden.discourse.group/t/vaulthardening-against-brutforce-attacks/3091/1 "2023-11-14T20:42:29Z")

</div>

Hey there, I was looking into making my Vaultwarden instance more secure and followed this guide. [Hardening a Selfhosted Vaultwarden Password Manager](https://blog.lrvt.de/securing-vaultwarden-with-fail2ban/)  
My problem is that fail2ban errors on start with the following message: [2023-11-14 20:38:59,039 fail2ban.transmitter [332464]: WARNING Command ['serv - Pastebin.com](https://pastebin.com/0i8D2vG4)  
My suspicious is that it is having problems with ipv6, but I am unsure at this point.