Keepalives over Checkpoint Firewall

Question

Hello!
I'm having some problems, with CSS Keepalives over a Checkpoint Firewall.
It is not a CSS Problem, but may anyone expected the same and can help me how i can solve it.
We do some TCP or HTTP Head Keepalives over the Firewall to some Application servers.
The Firewall seems to terminate the TCP Connecten and also the HTTP Requests and the Service is always alive, because the Firewall answert the requests.
The guys who administrate the firewall do not know, why the firewall do this and do not know how to disable that feature.
Has anyone an idea how the firewall must by modified to not answer the keepalives?
This problem does only appear on TCP Port 80. All other TCP Ports work.
Best regards
Sven

Answer 1

Hello Gilles,
thanks for that fast response.
Not sure if this is the feature.
But my Head Keepalives does not work. Because the Firewall is generating a Error Webpage with a Responsecode of 200 OK
Leets have a look into this:
REQUEST: **************\nGET /monitor/alive?op=css HTTP/1.1\r\n
Host: 172.21.86.135\r\n
Accept: */*\r\n
Authorization: Basic U3ZlbkJ1dHplazo=\r\n
\r\n
RESPONSE: **************\nHTTP/1.0 200\r\n
Pragma: no-cache\r\n
Cache-Control: no-cache\r\n
Content-Type: text/html\r\n
Content-Length: 108\r\n
\r\n
Error\n\n
Error\nFW-1 at fw1gsb2bln: Failed to connect to the WWW server.\r\nWWWConnect::Close("172.21.86.135","80")\nclosed source port: 2314\r\n
finished.
The IP 172.21.86.135 is not configured on any device.
Doing HTTP Get Keepalives would solve this on CSS, but not on CSM and i also want to include more das 256 keepalives per CSS.
Sven