2-12
119136-D Rev. 00
NauticaRS 5.016R Release Notes for Nautica 200
NetBIOS Options
In a Microsoft network environment, if a remote user logs onto a
Windows NT domain server, the user's PC will periodically send
NetBIOS Name Server messages to the Primary Domain
Controller. This traffic will result in the ISDN line becoming
active and may cause excessive usage. Therefore, it is strongly
recommended that the user only logs onto the central network
when needed. If Domain Logon is not required, it may be prudent
to add a filter to prevent NetBIOS-NS packets from bringing up
an ISDN autocall. This can be achieved by filtering out UDP port
137. If no Microsoft networking is required, ports 137, 138 and
139 can be filtered out (UDP and TCP) to prevent NetBIOS
packets from making any ISDN calls.
Dial-Up Networking
For incoming calls from Windows 95 Dial Up Networking users,
the CHAP rechallenge interval needs to be set to zero to turn off
CHAP rechallenges which are not supported by Windows 95
DUN. There is now a path parameter, “challenge-timeout” (in
NauticaRS 4.1 this could only be changed through the use of a
custom PPP profile applied to the device).
Boot Strap Protocol
Nautica Wizard, as currently implemented, uses the BootP ports
(UDP ports 67 & 68), which means that it cannot coexist on a
host that is acting as a DHCP server or otherwise use the BootP
ports. Nautica Wizard is intended to be used on a PC running
Windows 95 or a Windows NT Workstation rather than a
Windows NT server which is also the network DHCP server.
