4

I have 2 networks, each one with its own internet connection, ISP modem-router , a dlna server(running serviio), some clients and the goal is to connect these two networks.

From each network, there is only one Ethernet cable available to the other network, so what I have done so far is to configure static routes on both ISP's router and put a third router to achieve routing between the two networks. The router is temporarily a Airlive N.Power.

After this, I can successfully ping and access files on the other network. So far so good. Unfortunately, the dlna servers are not discoverable in the other network.

To better explain it, assuming that we have a TV as dlna client in network A, this TV only discovers the dlna server of its own network and not the one at network B.

Serviio uses TCP port 8895 and UDP 1900.I guess that I have to forward traffic at these ports among networks but I am not aware where should I apply this. On ISP routers, on third router or both?

Question: How I can make dlna servers to be automatically discovered in the other network?

Improve this question
1
  • 1
    DLNA conceptually uses multicast, so you need multicast routing both on your connecting router and on the two ISP routers. This is not trivial to set up, and even if you know how to, lots of things can still go wrong, from your appliances using broadcast instead of multicast to more subtle issues. So don't expect a step-by-step recipe. A simpler solution may be to hook up a single DLNA server to both networks (using a tunnel/VLAN if necessary), if bandwidth permits this.
    – dirkt
    Commented May 13, 2019 at 8:50

2 Answers 2

Reset to default
2

As @dirkt stated in the comments, my requirement is not an easy one. But I managed to find a solution.

At first, I replaced the third router standing between two networks with pfsense installed on an old pc.

pfsense comes with IGMP proxy for managing multicast routing. Enabling it didn't work for me.

So I searched for other multicast routing solutions and I found pimpd.

I installed it manually to pfsense as it is not included in official packages, and started the server using default configuration file and voila, DLNA servers are discovered, with a delay I have to admit. This may be improved by messing with the configuration.

Note: I would not accept my answer, hoping for a better one.

Improve this answer
0

Try smcroute.

Config File:

mgroup from br-lan group 239.255.255.250
mroute from br-lan group 239.255.255.250 source 192.168.9.220 to br-WAN

Where "br-lan" is your local network device and "br-WAN" the destination. "192.168.9.220" is the IP of the DLNA server of your local network. This config is unidirectional.

Firewall rule to increase Multicast TTL +1:

iptables -t mangle -A PREROUTING -i br-lan -d 239.255.255.250 -j TTL --ttl-inc 1
Improve this answer
1
  • Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.
    – Community Bot
    Commented Feb 19, 2022 at 7:52

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .