--- a/plugins/mod_admin_telnet.lua	Sat May 18 12:03:03 2013 +0100
+++ b/plugins/mod_admin_telnet.lua	Sat May 18 13:20:46 2013 +0200
@@ -700,9 +700,9 @@
 				error("This version of LuaSec does not support certificate viewing");
 			end
 		else
-			local certs = conn:getpeerchain();
-			local cert = certs[1];
+			local cert = conn:getpeercertificate();
 			if cert then
+				local certs = conn:getpeerchain();
 				local digest = cert:digest("sha1");
 				if not cert_set[digest] then
 					local chain_valid, chain_errors = conn:getpeerverification();
@@ -957,7 +957,9 @@
 def_env.user = {};
 function def_env.user:create(jid, password)
 	local username, host = jid_split(jid);
-	if um.user_exists(username, host) then
+	if not hosts[host] then
+		return nil, "No such host: "..host;
+	elseif um.user_exists(username, host) then
 		return nil, "User exists";
 	end
 	local ok, err = um.create_user(username, password, host);
@@ -970,7 +972,9 @@
 
 function def_env.user:delete(jid)
 	local username, host = jid_split(jid);
-	if not um.user_exists(username, host) then
+	if not hosts[host] then
+		return nil, "No such host: "..host;
+	elseif um.user_exists(username, host) then
 		return nil, "No such user";
 	end
 	local ok, err = um.delete_user(username, host);
@@ -983,7 +987,9 @@
 
 function def_env.user:password(jid, password)
 	local username, host = jid_split(jid);
-	if not um.user_exists(username, host) then
+	if not hosts[host] then
+		return nil, "No such host: "..host;
+	elseif um.user_exists(username, host) then
 		return nil, "No such user";
 	end
 	local ok, err = um.set_password(username, password, host);

--- a/util/ip.lua	Sat May 18 12:03:03 2013 +0100
+++ b/util/ip.lua	Sat May 18 13:20:46 2013 +0200
@@ -23,6 +23,13 @@
 	elseif proto ~= "IPv4" and proto ~= "IPv6" then
 		return nil, "invalid protocol";
 	end
+	if proto == "IPv6" and ipStr:find('.', 1, true) then
+		local changed;
+		ipStr, changed = ipStr:gsub(":(%d+)%.(%d+)%.(%d+)%.(%d+)$", function(a,b,c,d)
+			return (":%04X:%04X"):format(a*256+b,c*256+d);
+		end);
+		if changed ~= 1 then return nil, "invalid-address"; end
+	end
 
 	return setmetatable({ addr = ipStr, proto = proto }, ip_mt);
 end