# ec2- loadbalancer  - how to check ports are open for 1934

**URL:** <https://community.wowza.com/t/ec2-loadbalancer-how-to-check-ports-are-open-for-1934/328>\
**Category:** Wowza Streaming Engine\
**Created:** [October 2, 2011, 3:16pm UTC](https://community.wowza.com/t/ec2-loadbalancer-how-to-check-ports-are-open-for-1934/328 "2011-10-02T15:16:00Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/system/32/447_2.png) [@system](https://community.wowza.com/u/system)\
**Post date:** [October 2, 2011, 3:16pm UTC](https://community.wowza.com/t/ec2-loadbalancer-how-to-check-ports-are-open-for-1934/328/1 "2011-10-02T15:16:00Z")

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I have setup a load balancer on our windows server and it works fine.

Using that as a base I am now trying to make a load balancer on ec2 building a start-up script and assigning that server an ip address so all the edge servers can see it and the player can request the least loaded server to stream from.

I have checked through my vhosts.xml and sever.xml files and it is configured as per the doc from what i can tell and also compared against the working windows server working system.

all it ever returns is server=0 - I have checked through the logs and nothing indicates that its not connecting on port 1934 or is . The EC2 security groups are set for tcp and udp 1934 0.0.0./0 so anything from anywhere can get to those 2 ports , what I can’t check is if port 1934 is responding or why I just get server=0

I can run (and have done) my system as:-

local server - origin , load balancer listener

ec2 edge origin - no load balancer listener - origin local server.

ec2 edge server using edge origin as their origin (take the pressure of our own server) load balancer sender.

just can’t add in a EC2 load balancer on a separate instance.

Any thought appreciated.

Thanks

Alex.

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**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [October 3, 2011, 1:29pm UTC](https://community.wowza.com/t/ec2-loadbalancer-how-to-check-ports-are-open-for-1934/328/2 "2011-10-03T13:29:15Z")

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On EC2 as long as the Security Group that each server is using allows UDP 1934 it will work. Has to be UDP.

The way to check status of a cluster is:

http://[load-balancer-ip-address]:1935/loadbalancer?serverInfoXML

“server=0” is output of http://[wowza-address]:8086/connectioninfo, which is per server. If you are checking the Load Balancer Listener, server=0 might be right, if it is a dedicated Load Balancer listener, there is no client connections.

Richard

Richard