Teldat bintec R3002 Manual page 351

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bintec Rxxx2/RTxxx2
to be accepted by your device. The identification of the caller from his or her ISDN number
is enough information to initiate setting up a tunnel.
To set up this service, you must first configure a call number for IPSec callback on the
passive side in the Physical Interfaces->ISDN Ports->MSN Configuration->New menu.
The value Service is available for this purpose in the
incoming calls for this number are routed to the IPSec service.
If callback is active, the peer is caused to initiate setting up an IPSec tunnel by an ISDN
call as soon as this tunnel is required. If callback is set to passive, setting up a tunnel to the
peer is always initiated if an ISDN call is received on the relevant number ( MSN in menu
Physical Interfaces->ISDN Ports->MSN Configuration->New for Service
ensures that both peers are reachable and that the connection can be set up over the Inter-
net. The only case in which callback is not executed is if SAs (Security Associations)
already exist, i.e. the tunnel to the peer already exists.
Note
If a tunnel is to be set up to a peer, the interface over which the tunnel is to be imple-
mented is activated first by the IPSec Daemon. If IPSec with DynDNS is configured on
the local device, the own IP address is propagated first and then the ISDN call is sent
to the remote device. This ensures that the remote device can actually reach the local
device if it initiates the tunnel setup.
Transfer of IP Address over ISDN
Transferring the IP address of a device over ISDN (in the D channel and/or B channel)
opens up new possibilities for the configuration of IPSec VPNs. This enables restrictions
that occur in IPSec configuration with dynamic IP addresses to be avoided.
Note
To use the IP address transfer over ISDN function, you must obtain a free-of-charge
extra licence.
You can obtain the licence data for extra licences via the online licensing pages in the
support section at www.teldat.de
Before System Software Release 7.1.4, IPSec ISDN callback only supported tunnel setup if
the current IP address of the initiator could be determined by indirect means (e.g. via
DynDNS). However, DynDNS has serious disadvantages, such as the latency until the IP
address is actually updated in the database. This can mean that the IP address propagated
. Please follow the online licensing instructions.
field. This entry ensures that
). This
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