This can happen if the “Keep alive” option is disabled for the user group. Enable “Keep Alive” from the Web Admin Console, Group -> Manage Group page.

 

 

Keep-Alive requests are constantly exchanged between server and client to check the connectivity between them. More the number of concurrent HTTP client users, greater the number of keep-alive requests. Hence, Cyberoam recommends to disable Keep-Alive request in-case of high number of concurrent HTTP client users.