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08 Sniffer: Non-promiscuous Interfaces




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This article is from the Sniffer FAQ, by Christopher Klaus cklaus@iss.net with numerous contributions by others.

08 Sniffer: Non-promiscuous Interfaces

You can try to make sure that most IBM DOS compatible machines have
interfaces that will not allow sniffing. Here is a list of cards that do not
support promiscuous mode:

Test the interface for promiscuous mode by using the Gobbler. If you find a
interface that does do promiscuous mode and it is listed here, please e-mail
cklaus@iss.net so I can remove it ASAP.

IBM Token-Ring Network PC Adapter
IBM Token-Ring Network PC Adapter II (short card)
IBM Token-Ring Network PC Adapter II (long card)
IBM Token-Ring Network 16/4 Adapter
IBM Token-Ring Network PC Adapter/A
IBM Token-Ring Network 16/4 Adapter/A
IBM Token-Ring Network 16/4 Busmaster Server Adapter/A

The following cards are rumoured to be unable to go into promiscuous mode,
but that the veracity of those rumours is doubtful.

Microdyne (Excelan) EXOS 205
Microdyne (Excelan) EXOS 205T
Microdyne (Excelan) EXOS 205T/16
Hewlett-Packard 27250A EtherTwist PC LAN Adapter Card/8
Hewlett-Packard 27245A EtherTwist PC LAN Adapter Card/8
Hewlett-Packard 27247A EtherTwist PC LAN Adapter Card/16
Hewlett-Packard 27248A EtherTwist EISA PC LAN Adapter Card/32
HP 27247B EtherTwist Adapter Card/16 TP Plus
HP 27252A EtherTwist Adapter Card/16 TP Plus
HP J2405A EtherTwist PC LAN Adapter NC/16 TP

Adapters based upon the TROPIC chipset generally do not support promiscuous
mode. The TROPIC chipset is used in IBM's Token Ring adapters such as the
16/4 adapter. Other vendors (notably 3Com) also supply TROPIC based
adapters. TROPIC-based adapters do accept special EPROMs, however, that will
allow them to go into promiscuous mode. However, when in promiscuous mode,
these adapters will spit out a "Trace Tool Present" frame.

 

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