Efika PPC board battery problems

My Efika board had a quite long time no power supply, so the onboard battery (CR2032, 3V) was empty when i tried to install the brand new MorphOS 2.5. So i got a wrong MAC address, the date was in the year 2105, and so on... Also registering MorphOS (application under MorphOS-Partition:Tools) will not work correctly (the personal Key-File is bound to the MAC address).

The solution was simple:
1) Power down the Efika5k2
2) Remove empty Battery and wait for a few seconds
3) Power up Efika and stop on the openfirmware SmartFirmware
4) cd /
5) cd /builtin/ethernet
6) .properties
7) There you see the original MAC address - write it down, just in case
8) boot
9) After MorphOS booted open a new shell and check the MAC with ifconfig
10) If the MAC is ok insert a new CR2032 Battery into the running system, if not, repeat from step 1).

Using nmap to scan Ports

If you need to know, which ports are open on a system you can scan it with the open source tool nmap.

A simple
nmap [ip or domain]
will result in a list of open/filtered ports.

nmap -sT [ip or domain]
will scan the TCP-Ports.

nmap -sU [ip or domain]
will scan the UDP-Ports.

nmap -p 20-400 [ip or domain]
will check all ports between 20 and 400.