> For the complete documentation index, see [llms.txt](https://docs.chaindigital.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chaindigital.tech/validator-security/server-security-for-validators.md).

# Server Security for Validators

For an in-depth guide on securing validator nodes, refer to [How to Secure Your Server: From Changing the SSH Port to Managing Validator Keys with TMKMS](https://medium.com/@ernventures/server-protection-how-to-secure-access-and-save-validator-keys-dcc817a31956).

This article provides a comprehensive guide on securing a server, particularly for blockchain validators.

 It covers essential steps such as changing the default SSH port, setting up a non-root user, enforcing private key login, and configuring a firewall using UFW and fail2ban. 

It also explains secure validator key management using TMKMS for remote signing, automatic failover with Keepalived, and Shamir’s Secret Sharing for key splitting. 

Additionally, it introduces sentry nodes to mitigate DDoS attacks. These strategies aim to enhance both server and validator security.