diff --git a/hosts/tor/default.nix b/hosts/tor/default.nix
index f7c0977..b79c9ee 100644
--- a/hosts/tor/default.nix
+++ b/hosts/tor/default.nix
@@ -9,6 +9,8 @@
   networking.hostName = "tor";
   systemd.network.networks = {
     "10-lan" = {
+      # IPv4 settings are from `sudo dhcpcd --test`.
+      # IPv6 settings are from https://www.ssdvps.dk/knowledgebase/18/IPv6-Gateway.html.
       name = "ens3";
       address = [
         "91.210.59.57/25"