How to do that?

@julian @tanner thanks a lot guys, problem has been solved.

really helpfull!

@Tanner yes, I have Nginx on my server, Let me try setting it to 4567.

I wanna test NodeBB on my server, but I cant running up. any idea?

info: NodeBB v0.4.3 Copyright (C) 2013-2014 NodeBB Inc.
info: This program comes with ABSOLUTELY NO WARRANTY.
info: This is free software, and you are welcome to redistribute it under certain conditions.
info:
info: Time: Sat Jul 26 2014 10:27:44 GMT+0800 (CST)
info: Initializing NodeBB v0.4.3
info: * using configuration stored in: /xxxx/xxxx/xxxxx/config.json
info: * using redis store at 127.0.0.1:6379
info: * using themes stored in: /xxxx/xxxx/xxxxx/node_modules
info: Base Configuration OK.
warn: You have no redis password setup!
morgan deprecated morgan(options): use morgan("default", options) instead src/logger.js:128:22
morgan deprecated default format: use combined format src/logger.js:128:22
info: [notifications.init] Registering jobs.
info: [user.startJobs] Registering User Jobs
info: Enabling 'trust proxy'
info: [plugins] Initializing plugins system
info: [plugins] Sorting hooks to fire in priority sequence
info: [plugins] Plugins OK
info: [meta/css] Minifying LESS/CSS
info: [sounds] Sounds OK
info: [themes] Using theme nodebb-theme-vanilla
info: Middlewares loaded.
info: [themes] Compiling templates
info: [meta/css] Done.
info: [themes] Successfully compiled templates.
info: NodeBB attempting to listen on: www.xxxxxxx.com:80
error: NodeBB address in use, exiting...

[loader] Experienced three start attempts in 10 seconds, most likely an error on startup. Halting.