patrick@blister.Solbourne.COM (Patrick Bowman) (01/10/91)
I'm looking for an Ethernet line monitor program that runs on an IBM PC and works through a standard Ethernet card (3Com, WD, etc.). I know that they exist - I've spoken to people who claim to have seen them in operation. I don't know how they can work, because I thought all Ethernet cards had hardcoded E-net addresses. (I have heard it rumored that some cards can have their E-net address downloaded to them, but I haven't seen examples of this). Does anybody know where I can find such a thing? The application that I'm looking at is running TCP/IP over Ethernet, and the ability to interpret TCP/IP packets would be a real advantage. Sorry about the cross-posting, I really don't know where this request is most likely to get answered.
e85rw@efd.lth.se (Ricard Wolf) (01/10/91)
In article <1991Jan9.180145.2211@blister.Solbourne.COM> patrick@blister.Solbourne.COM (Patrick Bowman) writes: >I'm looking for an Ethernet line monitor program that runs on an IBM >PC and works through a standard Ethernet card (3Com, WD, etc.). I >know that they exist - I've spoken to people who claim to have seen >them in operation. I don't know how they can work, because I thought (2) >all Ethernet cards had hardcoded E-net addresses. (I have heard it >rumored that some cards can have their E-net address downloaded to >them, but I haven't seen examples of this). Does anybody know >where I can find such a thing? (1) > 1) FTP software have a package called LanWatch, witch monitors and disassembles network traffic. 2) True, there is usually a TTL PROM on the E-net card containing the node address, but: a) This usually has to be downloaded to the Ethernet controller chip by the network software. b) Most E-net controllers can be set in so-called promiscuous mode, in which theyreceive all packets from the net, regardless of their address. -- Ricard Wolf +--------------------------+-------------------------------------+ | Ricard Wolf | Lund Institute of Technology | | email: e85rw@efd.lth.se | If you can't buy 'em - build 'em !! | +--------------------------+-------------------------------------+