Rep-51002 Bind to Report server failed

Symptom
Trying to access the Reports Server gives following error:

REP-51002: Bind to Reports Server failed

This error is given when you try to access Reports Server using getserverinfo or showjobs. For 

example:
http://or11/reports/rwservlet/getserverinfo?server=rep_dev
or
http://or1/reports/rwservlet/showjobs?server=rep_dev

Also, running the command "rwdiag.sh -findAll" gives error:
REP-50503 No server found in the network

However, in the Reports Server trace files (for example D:\Oracle10GASSuite\reports\logs\rep_dev), it shows that the Reports Server is actually up and running. There are no errors in the trace files.

Cause

There are multiple causes some of them are following

Cause 1: multiple network cards (NICs), use of VPN software, missing Gateway configuration for the network definitions in the NIC can cause this behaviour, and/or use of VMware

Solution 1: If your machine setup uses multiple network cards and/or you are using software VPN (e.g. cisco) and/or you have VMware installed on your machine, switch to using the naming service for the server.

Simple Solution 1: Just try to disable VMWare network cards in network settings.

Cause 2 : This is a firewall permissions problem.
It is not a problem with the Reports Server, as the server traces show it is up and running.

Solution 2:  To implement the solution, please execute the following steps:

1. Open the port on the firewall to allow the Reports Server to be accessible.
a) Run command:
rwdiag.sh -findAll
b) From output, check what value is used for Channel port. For example:
Broadcast mechanism used to locate servers
Channel address = ###.###.###.###
Channel port = 14021
c) Open the channel port on the firewall, in this case, it is port 14021.
2. In the firewall, authorize requests from your host's IP address to ###.###.###.### (the channel address shown above).
Note: If the above still does not work, then you may try adding the name of the machine where Reports Server is and the IP for that machine to the hosts file (/etc/hosts or C:\WINDOWS\system32\drivers\etc\hosts). For example: