On 04/10/2014 03:43 PM, Chris Adams wrote:
Once upon a time, Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> said:
Many howtos I find for Telnet and IPv6 say to use the '-6' option.
Well no such option exists in the Fedora telnet client.
I know if the host is ONLY accessable via v6, Telnet will use v6.
But how do I force the client when the server is listening on both
stacks?
Are you using the "telnet" command to connect to Telnet servers,
I am using the real telnet to connect to the telnet server. But I am
running HIP (HIPL implementation at http://infrahip.hiit.fi) on both
ends, and a HIP SA comes right up and telnet is running over ESP in
transport mode (BEET, actually). All nice and secure. I have many
other apps working nicely both on IPv4 and IPv6. I just want to force
telnet to use IPv6. Actually it hardly matters. HIP breaks the
fate-sharing between network and transport. I have run IPv4 only apps
on IPv6 only networks and they have been just happy.
or just
to arbitrary ports? If you are just using it for arbitrary ports (such
as SMTP or IMAP testing for example), you could use "nc" instead. It
does have "-4" and "-6" options. It has some other differences, which
may mean it won't work for you; just offering it as a possibility.
As for the "telnet" command: it looks like Fedora is using an ancient
version of telnet, probably forked from OpenBSD in the distant past.
There's a bug for this already:
https://bugzilla.redhat.com/show_bug.cgi?id=1069809
The best solution may be for somebody to try to merge in a current
telnet release from somewhere (whether OpenBSD's or somebody else's).
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