> Source: [sk182919](https://support.checkpoint.com/results/sk/sk182919)

# sk182919 - RADIUS user cannot log in to VSX Security Gateway over SSH

| Property | Value |
|----------|-------|
| Solution ID | sk182919 |
| Date Created | 2025-01-16 |
| Last Modified | 2025-07-16 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- * The "`cpwd_admin list | grep -E 'APP|WSDNSD'`" command on the VSX Security Gateway shows that the process was restarted numerous times.

  Specifically, in the context of the Virtual System that performs the most DNS queries.
* Restarting the WSDNSD process manually on the VSX Security Gateway restores access to the VSX Security Gateway for the RADIUS user.

* The `/var/log/messages` file on the VSX Security Gateway contain these lines:

  `VFS: file-max limit XXX reached`
* RADIUS user cannot log in to a VSX Security Gateway over SSH.

  Local Gaia OS user logs in to a VSX Security Gateway over SSH without issues.
* The "`lsof | grep wsdnds | wc -l`" command on the VSX Security Gateway shows the value that is over 60% of the total count that the "`cat /proc/sys/fs/file-nr`" command shows.

## Cause

Incorrect or incomplete DNS configuration for the VSX Security Gateway.

In addition, the WSDNSD process is single-threaded. For each TCP connection, the process must wait for the TCP connection to succeed or fail. There is no mode to "connect in the background".

## Solution

This solution requires authentication. Please log in to view the full solution.

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