Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Is it possible to configure port 80 on a Cisco load balancer as being general TCP, rather than specifically HTTP, in order to support more protocols on that port?

I am attempting to get Websockets working through the balancer but see behaviour suggesting it prevents non-HTTP traffic on port 80 by default.

share|improve this question
What Cisco load balancer? – adaptr Apr 16 '12 at 10:29

I believe it is possible, but I doubt it supports the Websockets protocol. Support (for Websockets) in leading load-balance solutions (which many say Cisco isn't) has only arrived in the last month or so and, as a result, I suspect that's the cause of your issue.

share|improve this answer

I guess you are talking about the Cisco ACE load balancers?

And, yes... As mentioned this is fully possible. Although Cisco ACE does not have any specific knowledge of the WebSocket protocols, it can be set up to do generic Connection based Level 3 and 4 load balancing. I have successfully done this myself using information from the following manual page:

It provides examples for load balancing of many protocols, plus information on generic TCP/IP (Level 3 and 4) connection loadbalancing (which I used).

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.