Internet gatekeeper for Linux - exhausting max. number of connections (pre_spawn)
We are facing some issues with Internet Gatekeeper for Linux 4.07.3280. The error log of FSIGK HTTP daemon shows the following errors and users using the proxy complain about web pages not opening.
###ERROR### Maximum connections: warning: Client connections reached maximum connections(1250). More request will be blocked/rejected. If there is many warnings, please increase 'Maximum Connections' settings(pre_spawn value of fsigk.ini) of this service. (200 will be good value as start line).
We had the issue already some time ago and it was raised with F-Secure support. It was recommended to upgrade from 4.04 to 4.07 at this time but since we are running latest version of FSIGK for Linux we can just increase pre_spawn value further. Currently it has been increased to 2000 which is 10x the proposed value. The above connections has been created by an office of 10 users.
I know today's web browsers open a number of parallel streams but I can't imagine any of our users creating on average 125 simultaneous connections via HTTP/HTTPS.
Any recommendation would be appreciated.