At 01:19 PM 9/26/02 -0500, [EMAIL PROTECTED] wrote: >On 26-Sep-02 sr wrote: > > > > This leads me to another question: Why is another machine able to steal the > > IP address like that with Linux? Even Windoze prevents this from happening > > and just gives you an annoying popup to let you know someone else just > > connected with the same IP. > >I also have noticed windows doing that, not really sure the exact mechanism >they use, maybe looking at the ARP.
I have not seen this behavior under Windows. But then, I can't recall ever duplicating an IP address on a LAN I was managing (and I don't have enough non-essential hosts running here to do proper tests without disrupting the operation of the LAN). Could someone who has seen it please describe it a bit more exactly? Under what circumstances does it occur? For example, if WinXX host A has IP address a.b.c.d, and WinXX host B tries to connect to the LAN using the same address, do *both* machines report an error right away? If not both, then which one? Does the version of Windows involved affect the answer? Does the use of a switch (rather than a hub) affect the result? What about a router doing proxy arp for one of the hosts? Does Windows-based (SMB) directory sharing seem to play any role in when this does and does not work? Will Windows host A or B (as appropriate) detect the duplication if the other device is not a Windows PC (a Mac, or a Linux host, or an embedded device like an ISDN router)? Although the off-the-shelf Linux setups I'm familiar with don't do any checking of this sort, I can see how adding some degree of checking would be readily doable. DHCP servers, for example, do arp addresses before issuing leases for them. For other parts, though, I'm at somewhat of a loss to see how in principle one might do it without creating a lot of system and network overhead. -- -------------------------------------------"Never tell me the odds!"-------- Ray Olszewski -- Han Solo Palo Alto, California, USA [EMAIL PROTECTED] ------------------------------------------------------------------------------- ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf ------------------------------------------------------------------------ leaf-user mailing list: [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user SR FAQ: http://leaf-project.org/pub/doc/docmanager/docid_1891.html
