diff --git a/hosts/epyc.nix b/hosts/epyc.nix
index 0b94506..4d9dbbf 100644
--- a/hosts/epyc.nix
+++ b/hosts/epyc.nix
@@ -19,6 +19,9 @@ in
 
   # Open public access to our PostgreSQL.
   services.postgresql.enableTCPIP = true;
+  services.postgresql.authentication = ''
+  host  hydra-nixos-org hydra_ro  ::/0  trust
+  '';
   networking.firewall.allowedTCPPorts = [ 5432 ];
 
   virtualisation.nvisor.vms = {