Several issues appear here - I'll have to throw out some quick thoughts as I'll be away for a few days.
1.
$ netcardconfig
ifconfig eth0 192.168.0.3 netmask 255.255.255.192 broadcast 192.168.0.255 up
route add default gw 192.168.0.1
Setting Nameserver in /etc/resolv.conf to 192.168.0.205
Adding Nameserver in /etc/resolv.conf: 192.168.0.23
Done.
Not clear what's going on here - 2 different nameservers 'perceived' by netcardconfig on the network (?!)
How about trying each in turn with a manual edit of /etc/resolv.conf .

2. Unlike my domestic router-managed network, your company network is dynamically allocating different IP addresses at different times of connection of your machine : cf
(First posting, where by your new convention X.X.X = 192.168.0 ) :
IP: X.X.X.2 (correct IP for this machine)
(Previous posting) :
ifconfig eth0 192.168.0.3
This could be tedious if, as in my system, Knoppix 5.1.1 doesn't work in DHCP mode
- maybe try a bit of trial & error