Chapter
5
Dial-In
This Chapter explains the setup required to enable and use the ISDN Internet Router's Dial-in feature.
Overview
The ISDN Internet Router's dial-in feature allows remote users to:
- Use an ISDN TA to connect to the ISDN Internet Router, using the same PPP
communication software (e.g. Dial-up Networking) that they use for
dial-in Internet access.
- Have their user name and password verified by the ISDN Internet
Router.
(Note: If dial-in PPP link security is set to "None", no
verification is performed.)
- Access the LAN resources as if they were a local user. To other users on the
LAN, the remote users appears to be a local PC, using the IP Address allocated
by the ISDN Internet Router.
For additional security, the dial-back function can be used. In this
situation, the ISDN Internet Router will hang-up the user's incoming connection,
and then call them back.
To use the Dial-in Feature:
- Dial-in must be Enabled on the Dial-in Tab. (Default is
Disabled.)
- User access data is required. The options are as follows:
- Allow access by anyone and everyone (not recommended) - If
Authentication on the Dial-in screen is set to None, then the user
name and password is not checked, so anyone who dials in can gain access.
- All users use the same log-in - Create a single user (on the
Dial-in screen) with dial-in access, and all users use this
log-in.
- Enter data for each user - Each person requiring dial-in access has
their data entered on the Users screen.
- The Usage setting on the ISDN tab should be checked:
- If set to Always use 2 B Channels (for Internet Access), then Dial-in
is only possible if the ISDN Internet Router is idle.
- If set to Dynamically use 2 B Channels (for Internet Access), then 1
B Channel will be dropped if necessary to allow a dial-in call.
- If set to Use 1 B Channel (for Internet Access), then the
2nd B Channel is always available for Dial-in.
- The remote user can use the same dial-up software they use for Internet
access. Once connected, the remote user can access LAN resources as they
normally would. They will appear to other LAN devices as a normal PC on the LAN,
using the IP Address allocated by the ISDN Internet Router.
Dial-in
Screen

Figure 13: Dial-in
Data - Dial-in
Tab
Data - Dial-in Access |
Enable Dial-in Access
|
If checked, dial-in will be allowed. Otherwise, any attempt to dial-in will
be blocked. The default is Disabled.
|
|
If a dial-in connection remains inactive, it is terminated after this time
period. Allowable range is 0-99 minutes; 0 means no limit.
|
Authentication
|
Select the desired security option for log-in:
Disable means no user name/password check is performed. Anyone can
connect. It is not necessary to enter each user's details if this option is
chosen. Warning! This is a major security risk.
Enable uses the industry-standard PAP system.
|
User List
Entering of user data is required only to provide secure dial-in access.
- All users who have been created will be listed here.
- The Dial-in column indicates whether or not each user currently has
Dial-in access. Click any entry in this column to Enable/Disable dial-in
access.
- The user "Guest" is pre-defined, with no password or Dial-in access. This
name will initially appear in the list.
- Note the limitations on user names:
- Multiple words are NOT allowed.
- Punctuation and special characters must NOT be used.
- User names are case insensitive (case is ignored).
Data - User List |
User Name
|
Name of this user.
|
Password
|
The password for the current user. Passwords are case sensitive. When
creating or changing a password, enter it in the Verify field also.
|
Enable Dial-in
|
Check this to enable dial-in; uncheck to suspend dial-in access.
|
Time limit
|
After this time period, the user is disconnected. Allowable values are 0
(default) to 999 minutes. Zero means no time limit.
|
Call Back
|
Options are:
- Disabled:- User can simply dial-in; the device will not hang-up and
call back.
- Roaming:- After providing their name and password, the user is
prompted for the call-back number.
- Fixed:- The number entered in the Telephone No. field is
always used as the call-back number.
|
Remote
Users
Remote users can use the same dial-up software they use for Internet access.
They should check the following:
- Their ISDN TA must dial the telephone number of the ISDN Internet Router.
- Their software should be set to obtain an IP Address from the dial-in host.
(This is the standard configuration; no changes should be required.)
Upon
connection, the ISDN Internet Router will allocate a suitable unused IP Address.
- When prompted for user name and password, they must enter the Name
and Password stored in the ISDN Internet Router.
Once connected, the remote user can access LAN resources as they normally
would. They will appear to other LAN devices as a normal PC on the LAN, using
the IP Address allocated by the ISDN Internet Router.