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URGENT: Port Forwarding RANGE issue!

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URGENT: Port Forwarding RANGE issue!

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URGENT: Port Forwarding RANGE issue!
URGENT: Port Forwarding RANGE issue!
2023-08-30 11:14:38 - last edited 2023-09-05 06:35:38
Tags: #VLAN & Multi-Networks #WAN Setup #NAT
Model: ER7206 (TL-ER7206)  
Hardware Version: V1
Firmware Version: 1.3.0 Build 20230322 Rel.70951

Product Category:
Business
Omada Cloud SDN (Routers)

Model Number:
ER7206

Hardware Version:
V1

Firmware Version:
1.3.0 Build 20230322 Rel.7095

Internet Service Provider(ISP):
Transworld Home

Subject:
Port Forwarding RANGE issue

Detailed Description of the Problem:
I recently bought this router.
I have three servers on LAN where I want to forward ports as TCP/UDP in Transmission > Nat > Virtual Servers:

Server1:
External: 1-1000 Internal: 1-1000
Server2:
External: 1001-2000 Internal: 1-1000
Server3:
External: 2001-3000 Internal: 1-1000

These settings work for Server1 for but not for other servers.
I have ports listening on all servers and it works for both servers if I do one port at a time like:

Server2:
External: 1022 Internal: 22
Server3:
External: 2022 Internal: 22

But doesn't work in range.
So I think it's the problem in the router's algorithm on how it handles port ranges,
as long as internal and external ports are the same in range it works,
but if it doesn't work for a one-on-one pattern even though the number of ports is the same.

I am an IT expert myself so I know what I am talking about.
I tried SSH into the router but it doesn't give me shell access and I'm only limited to CLI mode,
which doesn't offer much more than what the web portal offers.

Please help resolve the issue, Thanks!

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#1
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20 Reply
Re:URGENT: Port Forwarding RANGE issue!
2023-09-04 09:19:31 - last edited 2023-09-04 09:19:40

Hi @AdeelKhan 

Thanks for posting in our business forum.

I have sent your problem to the test team for further test. We will try to reproduce this issue and see if we can get a fix for you.

If your issue is in a hurry, please contact the support team for instant help. smiley

 

Thanks for your understanding.

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#2
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-04 09:52:10 - last edited 2023-09-07 08:28:35

  @Clive_A Thank you so much and I'll try beta version for sure, hopefully it helps!

 

Additional Information:

The problem is happening because your router doesn't support 1:1 port mapping, so unless internal and external ports are the same numbers or there's a union b/w internal and external ports it will work, but won't try to map 1:1.


So here's an analogy:

If I use my Raspberry Pi 4 running ubuntu server 22.04 (LAN IP: 192.168.1.2) as a router and enable DMZ on my ONT to forward all traffic on all ports of this raspberry pi (192.168.1.2), it will forward ports using 1:1 method, after setting up iptables like this:

 

 

sudo iptables -t nat -A PREROUTING -p tcp -m tcp --dport 2001:3000 -j DNAT --to-destination 192.168.1.3:1-1000/2001
sudo iptables -t nat -A POSTROUTING -j MASQUERADE

 

it will make sure 1:1 port forwarding in way that:

192.168.1.2:2001 -> 192.168.1.3:1

192.168.1.2:2002 -> 192.168.1.3:2

...

192.168.1.2:3000 -> 192.168.1.3:1000

 

But it the same behavior isn't being exhibited by the ER7206 router, because I doesn't support 1:1 port range mapping apparently.

 

P.S. Patiently waiting for a patch! 🥺

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#3
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-05 02:10:44

Hi @AdeelKhan 

Thanks for posting in our business forum.

Is this a reply from our team? I don't see your email address with any ticket available in our system. Can you specify where the RE comes from?

I am checking with the test team to see if there is any update from them.

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#4
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-05 04:07:37

  @Clive_A 

 

Hi, sorry for the confusion. I wanted to add details into my initial request so I elaborated the case. "RE" wasn't the right word to use, sorry for that.

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#5
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-05 06:31:01

Hi @AdeelKhan 

Thanks for posting in our business forum.

I have confirmed with the test team and it is a known issue. Currently, we don't have a fix to this problem.

The test team is consulting with the dev and trying to find a solution at this moment. Could be a beta. I am not sure. I am waiting for further replies from them. Will get back to you if I get an answer. smiley

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#6
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-05 06:33:56 - last edited 2023-09-05 06:35:38

  @Clive_A 

Thank you so much! 
I'm patiently waiting for a beta patch.

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#7
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-12 03:25:50

Hi @AdeelKhan

Got an ETA that the V5.14 controller and adapted firmware may fix this issue.

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#8
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-12 07:55:18

Hey @Clive_A 👋

 

Thank you so much for getting back to me. 
That's actually a great news. I'm waiting for the firmware update then.

 

Do you have any ETA when the release of v5.14 (early access/beta) is scheduled?

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#9
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-12 08:13:30

Hi @AdeelKhan 

That could be Q1 next year.. Currently, the V5.12 beta is released for public testing.

If you need this in a hurry, I probably can ask the dev team and see if they can give beta targets for this issue.

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#10
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Re:URGENT: Port Forwarding RANGE issue!
2023-09-12 08:29:14

 @Clive_A 

Q1/24 is far away, can you please ask dev team if they can send a patch for me?

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#11
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