IPv4 & IPv6 at same time

[serviciosenlared]

Hi!

I followed the steps in your documentation to enable ipv6 and ipv4 on my server.

flashphoner.properties:
ip_v6=[MY_IPV6]
ice_add_ipv6_candidate=true

wcs-core.properties
-Djava.net.preferIPv4Stack=false

Now, the server only responds to IPv6:
tcp6 0 0 :::8444 :::* LISTEN 3604675/java

If I change -Djava.net.preferIPv4Stack to true, it only listens on IPv4.
tcp 0 0 0.0.0.0:8444 0.0.0.0:* LISTEN 3610702/java

I want to use both IPv4 and IPv6 at the same time.

Flashphoner version installed: 5.2.2136

On the server (Ubuntu 24.04.1 LTS), both IPv6 and IPv4 are enabled.
Both IPv4 and IPv6 connectivity seem to work fine:
ping6 google.com
PING google.com (2a00:1450:4001:829::200e) 56 data bytes
64 bytes from fra24s06-in-x0e.1e100.net (2a00:1450:4001:829::200e): icmp_seq=1 ttl=58 time=6.05 ms

ping4 google.com
PING google.com (142.250.186.110) 56(84) bytes of data.
64 bytes from fra24s06-in-f14.1e100.net (142.250.186.110): icmp_seq=1 ttl=118 time=5.99 ms

What am I doing wrong?

Thank you!

 

[Max]

Hello

According to the docs
The following settings can be used to set comma separated IPv4 and IPv6 interfaces to bind

https.address=0.0.0.0,2a00:1450:4001:829::200e

for port 8444

wss.address=0.0.0.0,2a00:1450:4001:829::200e

for port 8443

 

[serviciosenlared]

Oh! I thought this wasn't necessary, that it was optional. I'll set it up and run some tests. Thank you very much for your help!

 

[serviciosenlared]

Hi again!

I'm sorry, this hasn't worked.
I set the following in flashphoner.properties:

http.address = 0.0.0.0,[::]
https.address = 0.0.0.0,[::]
wss.address = 0.0.0.0,[::]
ws.address = 0.0.0.0,[::]

(I also tried setting the public IPv4 and IPv6 addresses, but without success).

If I restart, it keeps listening only on IPv4.

If I change -Djava.net.preferIPv4Stack to false, it only responds on IPv6. If I set it to true, it only responds on IPv4.
But it's impossible for me to make it respond on both IPv4 and IPv6 at the same time.

Thanks.

 

[Max]

We tested the build 5.2.2178.
flashphoner.properties (both ip and ip_v6 are local addresses):

wcs-core.properties

When WCS is started, it shows tcp6 only in netstat results:

But actually it responds on IPv4 too:

Have you tried to open the statistics page (or web admin page) using IPv4?

 

[serviciosenlared]

After numerous tests, I haven't been able to make it work correctly with both IPv4 and IPv6, but I've reached some conclusions.

If I set `-Djava.net.preferIPv4Stack=` to `false`, then:
- I can reach the server via IPv4 and IPv6 using `wscat`.
- Both ports 8081 and 8444 work on IPv4 and IPv6, and they are accessible via the web.
- Port 443 (which I changed to 8443) works, allowing `wss` connections on both IPv4 and IPv6.
- However, "createstream" stops working and never reaches `STREAM_STATUS.PUBLISHING`; it remains indefinitely in "waiting."

On the other hand, if I set `-Djava.net.preferIPv4Stack=` back to `true`, then:
- EVERYTHING works (web, wss, createstream, wscat...), but only over IPv4

Any changes in flashphoner.properties or wcs-core.properties do not solve this issue. The only thing that makes a difference is changing -Djava.net.preferIPv4Stack= from true to false:

• When set to true, everything works, but only over IPv4.
• When set to false, everything works over both IPv4 and IPv6 except createstream, which always remains stuck in "waiting."

I still don't understand what's going on. I've been searching along with ChatGPT for a solution, but I haven't been able to fix it.

Maybe a problem with ports 30001 to 36000? (I use webrtc only)

Thank you.