Installing mediaproxy-ng

This is a small guide on how to install mediaproxy-ng from sources on RPM based systems like CentOS.

Naming convention

All these “ng” stuff are really confusing and sometimes it’s hard to distinguish the pieces among them.

  • rtpproxy: it’s a media relaying software for RTP packets. It runs as a service and needs to be controlled and instructed using it’s own protocol.
  • rtpproxy module: it’s the Kamailio module that controls the rtpproxy service, from the configuration scripts.
  • rtpproxy-ng module: it’s the next generation (ng) module for Kamailio, based on the rtpproxy module. It serves as a replacement for that old module on newer systems.
  • mediaproxy: it’s another media relaying software, similar to rtpproxy, but older.
  • mediaproxy-ng: despite of its name, it is not the next-generation mediaproxy, but instead, the next generation of the rtpproxy (the service, not the module). From Kamailio, it can be controlled from both the rtpproxy and the rtpproxy-ng modules.

Before you begin: I’m using a x86 virtual machine. This means that you have to change the package names from i686 to x86_64 when necessary.

1. Kernel upgrade: you may not need to do this, so I recommend skipping this step unless you end up with an error like “undefined symbol” when trying to load the kernel module in the last step. In my particular case, I had to do it with my CentOS 6.0 VM.

yum upgrade kernel -y && reboot

2.¬†Install development tools: several tools are needed to perform this step. Instead of manually listing them one by one, I would rather save some typing time by just installing the whole package ūüėČ

yum groupinstall 'Development Tools'

3. Download the sources: from github

git clone

4. Install kernel development headers: this is going to be a kernel module, we need them.

yum install kernel-devel-$(uname -r)

5. A few other dependencies

yum install glib2-devel.i686 pcre-devel.i686 libcurl-devel.i686 libcurl.i686 xmlrpc-c.i686 zlib-devel.i686 iptables-devel.i686

6. Install mediaproxy-ng

cd /usr/src/mediaproxy-ng/daemon

7. Copy the resulting binary to the PATH: the Makefile doesn’t provide a rule for installing the binary.

cp mediaproxy-ng /usr/bin/

8. Compile and install the iptables extension

cd ../iptables-extension
cp /lib/xtables/

9. Compile and install the kernel module

cd ../kernel-module/
cp xt_MEDIAPROXY.ko /lib/modules/$(uname -r)/updates/
depmod -a
modprobe xt_MEDIAPROXY

10. Finally, if everything went fine, you should be able to see something like this:

# lsmod | grep -i mediaproxy
xt_MEDIAPROXY 16512 0
ipv6 264702 39 xt_MEDIAPROXY,ip6t_REJECT,nf_conntrack_ipv6