As of August 5, 2014, CloudFlare supports WebSockets for Enterprise customers only. (Announcement)

WebSockets are currently only available for Enterprise customers, but will be available for other plan levels in the future.

All other customers -- Business, Pro, and Free -- should create a subdomain for Websockets in their CloudFlare DNS and disable the CloudFlare proxy ("grey cloud" the record in CloudFlare DNS Settings).
https://support.cloudflare.com/hc/en-us/articles/200169466-Can-I-use-CloudFlare-with-WebSockets-

Hi. How can i setup multi site NodeBB on one server (like Wordpress,Discourse)?
Thanks

@a_5mith said:

@ronalbarbaren fastlys pricing structure is a joke.

If your site uses 10GB of traffic over 10 million requests, the charge per Fastly's pricing page would be $8.70. Because this amount falls below the $50 monthly minimum, we would charge you $50 for that month.

Whole lot of nope...

I use free for developer plan
P/S: I'm testing with Incapsula now

I'm not sure about that, but I'm testing with Fastly.com CDN on my forum and it almost work. Need more time to feedback
Edited: Fastly not compatible with NodeBB, login suddenly invisible after some minute

Lowend VPS still run normaly :). I tested with small forum

@ronalbarbaren said:

I enabled swap, I used SmartOS from Joyent
Here is my htop result

@luke said:

@ronalbarbaren Curious as to your VPS setup, your forum seems pretty responsive right now. What OS do you run and do you have swap enabled?

Ofcourse,I enabled swap, I used SmartOS from Joyent
Here is my htop result

My First Forum
http://sevenforums.net/

p/s :Run normally with lowend VPS 256MB RAM

i got same situation and i realize this problem because CloudFlare Free Plan