topic Re: Sagemcom router port forwarding rules not working in Broadband

Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 08:36:42 GMT

I am trying to set up port forwarding, and I get the "Operation could not complete, something wrong happened."

I have restarted the router several times, but no luck. This used to work back in 2024 (when I have used the feature last time).

TalkTalk Wi-Fi Hub / version SG4K100208

I have not done a factory reset yet, as I have not seen any posts here indicating that as a resolution.

Has anyone encountered this issue?

Re: Sagemcom router port forwarding rules not working

Mandisa-TT — Wed, 08 Oct 2025 08:58:13 GMT

Ensure that you are entering the correct internal IP address of the device you want to forward ports to. If there are existing port forwarding rules that conflict with the new ones, this can cause problems. Make sure there are no duplicate rules for the same ports.

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 09:30:03 GMT

Hi Mandisa,

Thanks for the reply.

After your reply:

- I have deleted all existing forwarding rules;

- I have tried re-adding one. Tested forwarding to several local IPs that I know are valid;

As a result, I am getting the same issue.

Not sure what to do - except a factory reset. This issue has been going on for the last 8-10 months, is not new.

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 09:40:11 GMT

OK, you have just deleted your reply from my initial message and re-posted it to my second message.

Looks like I might be talking to a bot.

Nice one.

Re: Sagemcom router port forwarding rules not working

Mandisa-TT — Wed, 08 Oct 2025 09:41:53 GMT

I understand @gab007 Factory reset is usually the last resort because it erases all setting so if you perform it, you will need to setup your network again.

@KeithFrench any advice.

Re: Sagemcom router port forwarding rules not working

KeithFrench — Wed, 08 Oct 2025 09:53:08 GMT

Hi @gab007

I am sure that this is a firmware bug that affected V208 & some versions before that. It only affects the router when using a different subnet from the default 192.168.1.0. However, I cannot see it in any of my recent firmware bug reports, suggesting that it was fixed.

However, as I cannot be sure, give me a short while and I will retest this for you.

Re: Sagemcom router port forwarding rules not working

Mandisa-TT — Wed, 08 Oct 2025 09:54:39 GMT

Thank you so much @KeithFrench

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 10:09:07 GMT

Thanks Keith,

Indeed, the default is 192.168.1.0 and I have been using 192.168.0.0 since I have been with TalkTalk, a few years now.

I am not in the position to do a factory reset at the moment (working from home), I can try in the evening. If you have anything new, please ping me.

Cheers,
Gab.

Re: Sagemcom router port forwarding rules not working

KeithFrench — Wed, 08 Oct 2025 10:51:20 GMT

Hi @gab007 @Mandisa-TT

I have just tested this on firmware V208 and the bug was fixed in an earlier release of firmware. With my router on 192.168.0.1, I have just tested TCP 443 and it worked first time. A few questions:-

How do you test this, via a device connected to your local network using your WAN IP address or DDNS domain? If so, you will be blocked via NAT Loopback. Try a smartphone disconnected from your Wi-Fi in this case & use mobile data to test with.
What happens when you use a port checking website from a device connected to your router (https://portchecker.co)? Does it report open or closed?
Has your WAN IP address changed recently?
If still not working, what type of device are you forwarding TCP port 443 to?

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 11:18:59 GMT

Hi Keith,

Thanks for taking the time and test this.

I guess the title of the post I have chosen is misleading (I cannot change it).

It's not that a forwarding rule it's not working, the issue is that I cannot add a forwarding rule.

Every time I try to add a forwarding rule, I get the message "Operation could not complete something wrong happened". Screenshot attached.

Re: Sagemcom router port forwarding rules not working

KeithFrench — Wed, 08 Oct 2025 12:17:42 GMT

Hi @gab007

Yes, this was part of the bug, but it only affected the 5364 with hardware revision V3; V4 was OK. Which exactly are you using, see:-

Dashboard > See internet settings > Manage advanced settings > TalkTalk Wi-Fi Hub > Device Info > General

There was no problem with the 5464 (Wi-Fi Hub 2). What about if you try to add the rule manually, rather than using the predefined HTTPS rule:-

Add Rule Manually

If this fails, either there is still a bug with the 5364 V3 (I no longer have V3 hardware, so I am unable to test) or it needs a factory reset.

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 12:41:03 GMT

Thanks Keith.

This is what I have, looks like 5364 3.00

Hardware Version FAST5364 3.00
Software Version SG4K100208
GUI Version 5.100.5

Adding the rule manually results in the same dreaded message, "Operation could not complete, something wrong happened."

Guess I will have to do a factory reset and see how that goes.

Re: Sagemcom router port forwarding rules not working

KeithFrench — Wed, 08 Oct 2025 13:47:23 GMT

Hi @gab007

Yes, that is exactly the one. I have not heard of anyone with this problem for a long time & not having V3 hardware to test on, I had to assume it was sorted. Let me know after you try the factory reset.

Re: Sagemcom router port forwarding rules not working

gab007 — Wed, 08 Oct 2025 13:54:31 GMT

Yes, after doing a factory reset, I am now able to add forwarding rules (both from templates and manual additions) . I am staying with 192.168.0.0

A bit painful that the whole network is reset, but it's great that this now works. Hopefully will help others as well.

Thanks a lot Keith for helping with this. Cheers
Gabriel.

Re: Sagemcom router port forwarding rules not working

KeithFrench — Wed, 08 Oct 2025 13:55:55 GMT

Hi @gab007

You're very welcome.