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D-Link DSL Modem/Routers => Other DSL modem/routers => Topic started by: sambha on January 11, 2019, 08:49:49 AM

Title: How to disable SSH access to the router from the WAN interface?
Post by: sambha on January 11, 2019, 08:49:49 AM

I just discovered that my D-Link DSL-2750U router is by default accessible on the WAN IP via ssh. How do I disable this?

This a serious security issue as the ssh login has the same default credentials as printed on the back of the router. I already saw 100's of login attempts on the system log in about 10 hours since the router is running.

Code: [Select]

Fri Jan 11 14:16:53 2019 31 other username=admin password=admin fail
Fri Jan 11 14:16:54 2019 31 other username=admin password=cisco fail
Fri Jan 11 14:16:55 2019 31 other username=admin password=administrator fail
.....

 Luckily the first thing I do when I setup a new router is to change the default password.

Title: Re: How to disable SSH access to the router from the WAN interface?
Post by: GreenBay42 on January 11, 2019, 09:15:14 AM

What hardware version do you have?

Current firmware?

Title: Re: How to disable SSH access to the router from the WAN interface?
Post by: GreenBay42 on January 11, 2019, 09:20:42 AM

Depending on the firmware and your region, log into the router web UI, go to Maintenance > Access Controls. Click the Services button.

Uncheck SSH and then click Apply.

Title: Re: How to disable SSH access to the router from the WAN interface?
Post by: sambha on January 11, 2019, 09:27:25 AM

(https://i.imgur.com/DmCc975.png)


There is no Maintainence--> Access Control page.

Title: Re: How to disable SSH access to the router from the WAN interface?
Post by: FurryNutz on January 11, 2019, 09:47:49 AM

What happens if you select the Maintenance tab?

Your picture is of the Status Tab.

Title: Re: How to disable SSH access to the router from the WAN interface?
Post by: sambha on January 11, 2019, 12:19:03 PM

Status was for the model number firmware etc.
Here's the maintenance tab:

(https://i.imgur.com/KJgrKjX.png)


The "system" link at the top just has options to save/backup/reset config.
the password tab has user managment.