| with a modem especially a
cable modem the biggest concern is with security.
The ICMP Router Discovery Protocol (IRDP,
RFC 1256) by default is enabled on DHCP clients that use MS
Windows95 (with Winsock 2), Windows 98/98SE, Windows ME, and
Windows2000. Clients discover routers and can switch to
backup routers if a network failure or a change is needed. You
should note that by spoofing IRDP Router advertisements,
a hacker can remotely add default route entries on a
remote system. To eliminate this soft spot, you need to make
these changes to the registry. This is intended for advanced
users, please backup your Registry before making any changes.
The Empire is not responsible for any dammages you might
inflict upon yourself by messing with the registry such as
having to reinstall your OS or worse. do not try this if you
are a beginner or intermediate user.
Windows 9x / ME:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\NetTrans\000n
(Where "000n" is your TCP/IP protocol. It
contains "TCP/IP" assigned to the "DriverDesc"
Value)
PerformRouterDiscovery="0"
(DWORD value)
Note: Although according to Microsoft's documentation the
value should be DWORD, they have moved to string values for
most TCP/IP related Registry entries in Windows 98, so the
documentation on the value type could be wrong.
Windows 2000:
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\interface
PerformRouterDiscovery="0" (REG_DWORD,
range 0,1,2, 0=disabled, 1=enabled, 2=enable only if DHCP
sends the router discover option)
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