Nginx
In your nginx configuration file, you can add the following line to your artifactory configuration (or universal config):
client_max_body_size 0;
You may alternatively set a limit here, just ensure it is above the size of your largest file(s).
HTTPD
By default there is no limit for HTTPD, but if you believe you are running into this issue, you can set the following directive in the artifactory configuration (or universal config):
LimitRequestBody 0