> When I connect to my employer from home, using pppd,
> it connects ok, but the system can't resolve the domain
> names (raw ip-numbers work, though) so I  guess the
> system doesnt receive any ip numbers for dn servers.
> Isn't it supposed to, and if not, should I (and where do I)
> specify them manually?

specify them in /etc/resolv.conf like so:

domain mydomain.net
search mydomain.net

nameserver XXX.XXX.XXX.XXX
nameserver XXX.XXX.XXX.XXX

if you have an internal domain you have a number of other options to
follow, but putting your ISPs DNS server info in /etc/resolv.conf will
get you talking to their servers and performing lookups.

regards,
       jrf