ISDN

ISDN Dialout

Installation has recognized and set up the ISDN card correctly. You will find the device ippp0 automatically configured when opening YAST2->Network/Basic->ISDN configuration. Select “Interface” radio button and the preconfigured device then press “Edit” button. Configure your ISP then set up the ISDN connection parameters. “My phone number” has to be set to the MSN that is the phone number without area code. “Dial mode” has to be set to “Automatic” using dial on demand. With the button IP settings you have to configure the static IP settings of the interface ippp0. We have used IP addresses not valid for our LAN and not valid for the internet so that no routing confusion may happen. For “Local IP address” use 192.168.1.1 and for “Remote IP address” use 192.168.1.2. Mind that these IP addresses will be replaced dynamically after connection to the ISP is established. For this purpose check the “Dynamic IP address” checkbox. For most ISPs “Dynamic DNS assignment” checkbox should be checked.

ISDN Dialin

We have configured a second interface for dialin ONLY. We are thinking of this as a better solution for dialin and dialout being used at the same time. Use the “Add” button of YAST2->Network/Basic->ISDN configuration to add a new device. It must be based upon the same hardware as ippp0. In general use the same settings you have used for ippp0. Mind that the ISP is not of interest here and might be chosen randomly (only dialin).

We have used a different “My phone number” (MSN) for dialin so that dialin and dialout are not conflicting.

The IP settings must be different, too. Use 192.168.0.10 (our servers IP address) as “Local IP address” and 192.168.0.100 as “Remote IP address”. Do NOT check the “Dynamic IP address” checkbox and do NOT check the “Dynamic DNS assignment” checkbox. So we are in need for static IP addresses for the two hosts of the point to point connection. Our server is 192.168.0.10 the client dialing in is 192.168.0.100. Mind that the connected client needs to be configured with IP address 192.168.0.100 (see Setting up Win2000 clients).

The ipppd is setup by /etc/ppp/option.ippp1 which we have provided manually. Most important we activate PAP authentication for our server using /etc/passwd users and passwords. You can see the complete file here .

The usage of /etc/passwd also requires a FIRST line in /etc/ppp/pap-secrets . This line should look like:

* * "" #allows authentication by /etc/passwd

At least one more line follows with authentication information for login into your ISP. This line has been inserted by YAST2 when configuring ippp0.