Hi All,

I set up a firewall server in front of the apache server using port
forwarding technique that relies on iptables.

I am using debian sarge.

The set up works for a while. Then, the apache servers do not listen to their ports. Then, another for a while, they start working.
After serving several requests, they stop working again.

I believe that this is not firewall issue.

Below is output from netstat -apn

tcp 0 0 192.168.0.2:80 0.0.0.0:*
LISTEN 4821/apache
tcp 0 0 192.168.0.2:80 ???.??.??.??:4499
SYN_RECV -

tcp 0 0 192.168.0.2:443 0.0.0.0:*
LISTEN 4834/apache-ssl
tcp 0 0 192.168.0.2:443 ???.??.??.??:4537
SYN_RECV -

As shown above, apache and apache-ssl are running, but they don't
respond to requests. Thus, I receive "The operation timed out when
attempting to contact ???.??.??.??" from my firefox browser.
Please note that ???.??.??.?? is undisclosed ip address of the server.

Thanks in advance.