diff --git a/server/weblistener.js b/server/weblistener.js
index <HASH>..<HASH> 100644
--- a/server/weblistener.js
+++ b/server/weblistener.js
@@ -145,6 +145,7 @@ function rangeCheck(addr, range) {
     ranges = (!_.isArray(range)) ? [range] : range;
     for (i = 0; i < ranges.length; i++) {
         parts = ranges[i].split('/');
+        parts[1] = parts[1] || '32'; // If no range provided, assume single host
         if (ipaddr.process(addr).match(ipaddr.process(parts[0]), parts[1])) {
             return true;
         }
If no CIDR range provided for reverse proxy whitelist, assume single host