Roon arc port fowarding error

[JANG_MIN_HO]

Roon Core Machine

SYNOLOGY DS720+

Networking Gear & Setup Details

ipTIME AX2004BCM

1. Who is your internet service provider?
   KT
2. Please list the make and model of your modem and router?
   ipTIME AX2004BCM
3. Do you have any additional network hardware, like additional routers or managed switches?
   NO
4. Does your network have any VPNs, proxy servers, or enterprise-grade security?
   NO

Connected Audio Devices

SPL Marc One
DENON AVR-4308
SAMSUNG GALAXY A32

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Description of Issue -

What is the exact port forwarding error message you see in the Roon Settings → ARC tab?

DS720+ broke down, so replace it with the same model
There are too many difficulties.
When I run ROON ARC on my phone, it comes out as POOR CONNECTION and the connection is bad
I can’t connect at all anymore.
The ROON ARC of the setup appears as NOT READY by running a run on the PC.
By the way, if I install ROON CORE in the window, ROON ARC is normal.
Windows and routers seem to mean normal.
By the way, when I install ROON CORE on Nas, it shows NOT READY as shown in the image below, and an error appears.
Link to ROON ARC error as guided by ROON LABS
I’ve tried everything, but I can’t.
I’ve checked all the basic port forwarding
I’ve changed the port number several times.
I also disabled all of the firewalls
Anti-virus programs have also been disabled.
I tried running UPNP and saw a repeat of it,
But it didn’t work.

I also removed ROON CORE from Nas and tried to reinstall it. It hasn’t been resolved.

Looking at the script below, it seems to be an IP4 and IP6 problem.

{“ipv4_connectivity”: {“status”:“NetworkError”,“status_code”:504,“error”:“error: Error: ETIMEDOUT, response code: undefined, body: undefined connected? undefined”},
“external_ip”: {“actual_external_ip”:“118.aaa.bbb.ccc”,“actual_external_ipv6”:“null”,“router_external_ip”:“118.aaa.bbb.ccc”},
“natpmp_autoconfig”: {“status”:“NotFound”},
“upnp_autoconfig”: {“server_ip”:“192.168.0.1”,“found_upnp”:true}}

[Martin_Webster]

The diagnostics you’ve provided suggest that UPnP is not properly configured on your router.

Please first try the following steps:

• Try to enable UPnP/NATPMP in the web administration interface for the router directly upstream from your Core
• Try to manually open the port in your router’s port forwarding configuration
• Make sure the IP/Port matches the Port listed in Roon → Settings → ARC
• Check for any VPNs or Firewalls that might be interfering
• Check if your modem is in Bridge mode

If you continue to experience difficulties, please tag the support team and include the following information:

1. What is the make and model of your modem and router?
2. Do you have any additional network hardware, like additional routers or managed switches?
3. Who is your internet service provider and what is your geographic region?
4. Is your Modem configured in Bridge Mode so that it operates only as a modem or do you have the ports forwarded on both?

[JANG_MIN_HO]

[quote=“Martin_Webster, post:3, topic:252829”]

• What is the make and model of your modem and router?
  modem : HAPPY, E-104C-W, router : ipTIME, AX2004BCM
• Do you have any additional network hardware, like additional routers or managed switches? NO
• Who is your internet service provider and what is your geographic region?
  KT, SOUTH KOREA
• Is your Modem configured in Bridge Mode so that it operates only as a modem or do you have the ports forwarded on both?
  [/quote] Maybe port forwarded modem

I tried everything you suggested above, but I can’t solve it. I’ve also disabled both firewall and VPN in synology dsm. Also, the router disabled UPnP and re-activated it. Of course, I checked that the PORT number is the same for both ROON and the router.
Interestingly, it is normal if ROON CORE is designated as PC. This error occurs only when ROON CORE is specified as the Sinology NAS.
Please give me a solution. I haven’t slept in a week and I’m struggling with this problem.

[Rugby (aka Daniel or Big Dan)]

@JANG_MIN_HO

KT

Is that a cellular ISP? I would check with them and see if you are on a CGNAT connection.

[JANG_MIN_HO]

No, my mobile phone service provider is LG U+. But Internet service provider is KT.

Today, someone who knows the network well remotely checked my modem, router, and synology nas for more than 3 hours.
He says there’s nothing wrong.
He even completely disabled all of Nas’ firewalls and tested them directly from the modem to Nas, but the roon arc error didn’t go away.
I even replaced it with a new router of the same model and tested it just in case, but it was the same.
In the meantime, if I change the roon core to the window, the roon arc error disappeared and became normal, but now I get this error even if I install roon core in the window.
I think the roon arc bug in roon is obvious.
The first time this bug occurred was when I changed the roon core to the window while returning the nas because it broke till that time it was normal, but when I received the nas again, I changed the roon core to nas again, and ROON ARC ERROR happened.
I think it’s a bug that happens when I change the roon core.
I want to contact the engineer of the roon, but I don’t know how to contact the engineer of roon.
Could you tell me how to contact him?

[JANG_MIN_HO]

I am waiting your answer.

[Martin_Webster]

You’ll need to wait your turn for Roon support to assist. Both @Rugby and I are volunteer moderators.

[Rugby (aka Daniel or Big Dan)]

@JANG_MIN_HO

But Internet service provider is KT.

@Rugby

I would check with them and see if you are on a CGNAT connection

Did you check to see if your ISP is giving you a CGNAT connection? Usually you have to call and ask them.

[JANG_MIN_HO]

My internet provider and my mobile phone service provider are different. Who should I ask if the cgnat service is provided?

[Carl]

@JANG_MIN_HO

Who should I ask if the cgnat service is provided?

@Rugby

Did you check to see if your ISP is giving you a CGNAT connection?

ISP = Internet Service Provider

Thus you should speak to “KT”.

[JANG_MIN_HO]

I will check it as soon as possible. Thanks.

[JANG_MIN_HO]

@Rugby

I would check with them and see if you are on a CGNAT connection

No, I am not on a CGNAT. I am trying to get a CGNAT.

[JANG_MIN_HO]

My ISP don’t know even CGNAT. My ISP don’t support CGNAT.

But, they said they support super DMZ. they said it is the same as CGNAT. Is it OK?

[Rugby (aka Daniel or Big Dan)]

@JANG_MIN_HO

No, I am not on a CGNAT. I am trying to get a CGNAT.

ARC doesn’t work well, if at all, with a CGNAT connection. That is what you do not want. That is why I suggested asking them, to see if you were and if that was the source of your issue; so that if you were you could get out of it.

[JANG_MIN_HO]

@Rugby

Is that a cellular ISP? I would check with them and see if you are on a CGNAT connection.

The roon client and roon remote are also working well. But only roon arc doesn’t work. I have a roon server in nas, will initializing and reinstalling the router and nas solve this problem?

[Rugby (aka Daniel or Big Dan)]

I dont think so. You need to ask your ISP if you have a publicly available IPv4 address to your router. Doesn’t have to be a static IP but that would work.

[JANG_MIN_HO]

192.168.0.11 is my a publicly available IPv4 address

[Martin_Webster]

@JANG_MIN_HO, addresses staring 192 are private addresses, used in your home.

Your ISP needs to issue a public IP4 address that is for your sole use. It may be statically or dynamically assigned.

You can find it using this site.

https://whatismyipaddress.com/

[JANG_MIN_HO]

I did check it and definately I have which is 222.x.x.x .

[Martin_Webster]

Okay, I see from your deleted post that you have a 10.xxx.xxx.xxx network in addition to the 192.xxx.xxx.xxx network.

Both of these are private networks. In other words, there are two networks that Roon ARC needs to navigate.

@JANG_MIN_HO

Do you have any additional network hardware, like additional routers or managed switches? NO

Since you stated that you have no additional networking equipment, it is probable that your ISP is using a form of carrier-grade NAT (CGNAT). This is where the public IP address (222.xxx.xxx.xxx) is shared by many customers, who are issued a 10.xxx.xxx.xxx address. ARC cannot negotiate this arrangement.

Therefore, you need to contact your ISP and ask them if they can assign you a public IP4 address.