diff --git a/docs/ircserver.md b/docs/ircserver.md
index 263c0cc..cc7d32a 100644
--- a/docs/ircserver.md
+++ b/docs/ircserver.md
@@ -7,7 +7,15 @@ We chose to go with charybdis, mostly because it's in the Debian/Ubuntu package
 The server is an Amazon EC2 instance, running Ubuntu. Initial system setup included:
 
 * modifying the hostname (`sudo hostname irc`) (and perhaps also needing to edit the `/etc/hostname` file, unclear)
-* updating the `/etc/hosts` file (add `172.30.0.216 irc.tilde.club irc`)
+* updating the `/etc/hosts` file (add `172.30.0.216 irc.tilde.club irc` and `172.30.0.176 tilde.club tilde`)
+* setting the EC2 security group to allow TCP traffic on port 6667 from the tilde shell server only
+
+### Setup changes on the tilde shell server to support the IRC server
+
+The tilde shell server needed a few tweaks, as well:
+
+* updating `/etc/hosts` (add `172.30.0.216 irc.tilde.club irc` so users can get to the server by hostname alone)
+* setting the EC2 security group to allow TCP traffic on port 113 (identd) from the IRC server only
 
 ## Installing charybdis