hi, For everyone who wants to use ms-get-dns with ipppd, here is my bug-report against isdnutils and the response I got (from Paul Slootman):
Subject: Re: Bug#81411: ipppd and dynamic dns > In my opinion there should be support for the ipppd-option > "ms-get-dns" (see ipppd(8); this is probably the same as "usepeerdns" > for pppd) which gets nameserver-addresses assigned from the provider. For intermittently connected systems (which is usually the case if you want to configure DNS via ipppd), I now recommend using dnrd. dnrd comes with an ip-up.d script that works fine with both ppp and ipppd. In fact, the new version of ipppd will "Suggest: dnrd". -- Felix Natter
