Unable to Access Web User Interface via HTTPS

186431

Created On 09/25/18 20:34 PM - Last Modified 01/24/23 14:09 PM

Admin Access

Certificate Profile

Certificate Management

Device Management

8.1

9.0

9.1

PAN-OS

Symptom

SSL-TLS profile with certificates has been configured for HTTPS authentication to Firewall.
After few days of operation, HTTPS access is not working
SSH is working fine.

Environment

Palo Alto Firewall.
PAN-OS 8.1 and above.
Management access using HTTPS
SSL-TLS profile configured.

Cause

The certificate is expired or there are other issues with the certificate. The web server process is not allowed to run on expired certificates as a standard security practice, which makes the GUI inaccessible.

Resolution

Option1:

If the SSL TLS profile used for management is known delete the same. This way the management access starts using the default certificate.
For example, The following command deletes the SSL TLS profile used for HTTPS access named profile-1

> configure
# delete deviceconfig system ssl-tls-service-profile
# delete shared ssl-tls-service-profile profile-1
# commit
# exit

Option2:

Since SSH access is possible, a new certificate can be created from the CLI.
Add the certificate to the SSL TLS profile
Use the newly configured certificate and SSL profile to be used for HTTPS.

Example below:

> request certificate generate ca yes certificate-name <cert name> name <IP or FQDN> algorithm RSA rsa-nbits 2048
> configure
# set shared ssl-tls-service-profile <profile name> certificate <cert name> protocol-settings min-version tls1-0 max-version tls1-2
# set deviceconfig system ssl-tls-service-profile <profile name>
# commit
# exit

Additional Information

To view the configured SSL-TLS-Service profiles, use the highlighted commands in configuration mode.