On Thu, 7 Aug 2003, Markus Nigbur wrote: > Subject says it: > Is it possible to determine if any random host is running IPv6?
No. On an unswitched LAN, you could probably show that it was. Anything else introduces too many unknowns (is the host down? Is it ignoring my IPv6 traffic? What's its IPv6 address anyway?). There's certainly no general way to determine that an arbitary IPv4 host is also running IPv6. You could get lucky if its IPv6 address is based on its IPv4 address, or, say, it's running an SNMP daemon which lets you query certain variables. Otherwise, you've no way of knowing. Quite apart from anything else, at what point is something "running" IPv6? I have a machine here with an IPv6 stack and a link-local address. It's able to talk IPv6, but it has nothing useful to talk to. Brian -- * * * * ** * * ** ** * * * ** * * ** * * * * * * * * * * --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
