Gateway service was not able to start with error "SSLProtocol: Illegal protocol"

KNOWLEDGE BASE

Gateway service was not able to start with error "SSLProtocol: Illegal protocol"

Published: 10 Mar 2023
Last Modified Date: 13 Mar 2023

Issue

Gateway process was not able to start due to a tsm configuration command that was incorrectly set. Note the additional spaces between the hyphen and the value:

"- TLSv1" and "- TLSv1.1":

tsm configuration set -k ssl.protocols -v "all -SSLv2 -SSLv3 - TLSv1 - TLSv1.1"

The error will be available in the Gateway error.log:

AH00526: Syntax error on line 1167 of /Program Files/Tableau/Tableau Server/data/tabsvc/config/gateway_<version>/httpd.conf:
SSLProtocol: Illegal protocol ''

Environment

Tableau Server

Resolution

Execute the below commands to set the correct value and remove the space between the hyphen and the value as shown here:

tsm configuration set -k ssl.protocols -v "all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1"
tsm pending-changes apply