diff --git a/src/commands/cwg_selfserv.ts b/src/commands/cwg_selfserv.ts
index 4a6fe18..46a4d27 100644
--- a/src/commands/cwg_selfserv.ts
+++ b/src/commands/cwg_selfserv.ts
@@ -14,7 +14,7 @@ export default class CWG_SelfService extends Command {
     this.name = 'selfserv';
     this.description = 'Creates a subdomain on your account. Do not include the entire subdomain: if you want `mydomain.cloud.libraryofcode.org`, just supply `mydomain` in the command parameters.\nYou must receive an authentication token from the Instant Application Service, see `?apply` for more information.';
     this.usage = `${this.client.config.prefix}cwg selfserv <desired subdomain> <authentication token>`;
-    this.aliases = ['bind'];
+    this.aliases = ['ss'];
     this.enabled = true;
     this.urlRegex = /^[a-zA-Z0-9\-._~:/?#[\]@!$&'()*+,;=]+$/;
   }
@@ -107,6 +107,7 @@ export default class CWG_SelfService extends Command {
   public async getPort() {
     const port = Number(await this.client.redis.get('cwgsspc'));
     if (await this.client.db.Domain.exists({ port })) throw new Error('Error retreiving port.');
+    if (port >= Number(process.env.MAX_CWG_PORT)) throw new Error('Error retrieving port.');
     await this.client.redis.incr('cwgsspc');
     return port;
   }