I got a x86-based firewall, produced by Stonesoft. It has serial interface, but it would be easier to install new operating system if I would get VGA output from the device. I discovered promising looking header on the PCB, labeled "J11 VGA".
It's 10-pin header. I discovered the ground and 5V-lines with multimeter and measured resistance from the other pins against the ground pin. Then I took an oscilloscope and measured every pin. Now I need your help to reverse-engineer these measurements into pin-out of VGA-cable. Any advice is very welcome. If any additional measurement is needed, please write a comment to this question.
Attached image show the results. I marked the pin number on upper left corner. The voltages marked there are peak to peak. I was able to find one pin with video-like signal (pin 9, ~120mV peak to peak). Pin 10 looks like sync, but I'm not sure, and I have no idea what the pin 8 is for..