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DMZ mode on Connect Box 3 not working

ramses728 · 2025-11-27T20:36:43+00:00

Bonjour, J'ai mon propre routeur depuis des années et j'aimerais continuer à l'utiliser car il offre de belles fonctionnalités sur mon réseau local. Auparavant, avec le routeur câblecobm, il y avait un mode bridge qui rendait cela très simple. La connect box 3 ne prend pas en charge cela, mais elle a une option DMZ qui fonctionnerait également pour mes besoins car elle fait essentiellement la même chose pour un appareil (c'est-à-dire mon routeur). Malheureusement, lorsque cette option est activée, aucun port n'est redirigé et une redirection de port manuelle est toujours nécessaire. C'est également l'expérience de plusieurs autres personnes comme le montre ce fil https://community.sunrise.ch/d/37843-dmz-option-does-not-work-on-connect-box-fiber-3. Je serais heureux de fournir des retours techniques. Cordialement

ramses728

Hello,
I have had my own router for years and I would like to continue using it as it provides some nice features on my local network. Previously with the cablecobm cable router there was a bridge mode which made this very simple. The connect box 3 does not support this but it has a DMZ option which would also work for my purposes as it basically does the same for one device (i.e. my router).

Unfortunately when setting this option no ports get forwarded and a manual port forward is still necessary.

This is also the experience of multiple other people as per this thread https://community.sunrise.ch/d/37843-dmz-option-does-not-work-on-connect-box-fiber-3 .

I would be happy to provide technical feedback.

Cheers

Xydocq

hello ramses728

Wellcome to the community.

I suggest you start from scratch.

Reset the Connect Box 3 to factory defaults. Hook up one computer to the Connect Box. Log on to the Connect Box, change your credentials and disable services you do not intend to use like WiFi and UPnP. I would say it's important to disable UPnP. Reboot the Connect Box.

Log on to the Connect Box again and activate DMZ. Use an IP address outside DHCP range, like 192.168.1.2. Reboot the Box again.

Disconnect the Computer from the Connect Box and connect it to your own router. Log on to your router and edit the WAN settings. Make the connection static, IP address 192.168.1.2, Subnet 255.255.255.252, Gateway 192.168.1.1. Edit the DNS to your wish. Now connect the WAN port of your router to port 4 of the Connect Box. Reboot your own router.

Once this is done, test the connection.

Please let us know if the issue still persists.