No such host is known
Hello, I have added a new entry of type "Devolutions Hub privileged account (Credentials)" to my personal User vault. The privileged account was correctly imported into a PAM vault before. I have full access to that PAM vault and can view/modify the account when directly editing the account in the PAM vault.
But when I use this account in RDM with the "Find by name (user vault)" on any type of session, I always get the same .Net error "No such host is known. (https:443)", see screenshot.
This only happens on a few recently added privileged accounts from the PAM vault. Other privileged accounts which were imported some weeks ago are working fine. Also, the "Find by name" function is working fine for any other kind of credentials in the user vault.
Could that be a bug in a recent RDM version or am I doing something wrong?
RDM version 2026.1.22.0
RDM .Net Error no such host.JPG
All Comments (1)
Hello ,
Thank you for the detailed report.From the error message, this does not look like a normal DNS issue with the target machine. The important part is this:
Socket error (https:443): No such host is known.This suggests that RDM is trying to resolve https as the hostname and 443 as the port, instead of resolving the actual Hub / PAM / credential endpoint. In other words, the host value appears to be parsed incorrectly before the connection is made.
A few things to validate first:
1-In the RDP entry, please confirm whether any field contains a full URL such as: https://something.example.cominstead of just the host name:
something.example.comFor RDP host fields, the value should normally be a hostname or FQDN only, without https://.
2- Please test whether the issue occurs only when the credential is selected through Privileged Account > Find by name.
As a workaround, please try one of the following:
- select the privileged account directly instead of using Find by name;
- duplicate the entry and reselect the PAM credential;
- remove any protocol prefix such as https:// from the related host / URL field if one is present;
Could you send us the RDM application logs after reproducing the issue? You can open them from Help > Application logs. RDM also provides support diagnostics from the Help tab, including application logs and system diagnostics.
We will review this with the development team,
Best regards,
Michel Audi