OK... I need to explain why I am doing this, I think this will help everyone out.

Background-
Our current hosting platform is hosted and maintained internally. We recently extended our hosting platform/WAN to all locations, which makes 9 unique IP blocks - each with their own router and firewalls (2). Our admins and operations group is known for throwing out servers (Unreal, ftp etc.) without running them through security or architecture.
Problem-
In order to monitor this, our security policy was amended to clearly outlaw this type of activity. The controls are from diverse groups (Security & Architecture). Security is to monitor the internally managed IP blocks for any host that responds on any port, includng non-standard ports from an external source. That means this script needs to scan every possible host on every possible port (including non-standard) on a scheduled basis, noting any deviations from the controlled baseline.

I was able to run a scan using a tool called IP-Tools on a single block and maintain the baseline without much hassle. However, this tool took 1.5 hours on a dial-up connection.
Given that the number of connects across our new block with all ports is 39714210, you can see that if I can reduce the communication traffic from 7 to 3 frames, that would be a significant decrease in processing time and network traffic.
I tested NMAP, however am not an expert. I did see, however, that my configuration scanned 2503 ports, I need to scan 65K.
I did, however, find a piece of C code that does a syn scan and think that I can extend it to do what I need it to do, however, would rather use PERL.

Edit by myocom: Removed superfluous code tags and fixed formatting

In reply to Re: Re^3: Low Level Network Connections by Anonymous Monk
in thread Low Level Network Connections by Anonymous Monk

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