On Wed, Mar 21, 2018 at 4:47 PM, Ronald F. Guilmette <r...@tristatelogic.com> wrote: > > "Kurt Buff" <kurt.b...@gmail.com > wrote: > In case it was not clear, none of the IPv4 addresses that are of interest, > or that are relevant to my question, are ones for which *I* posses any type > of SSH login credentials. > > But your question certainly raises an interesting possibility, and an > interesting question... one that I myself am not at all equiped or > qualified to answer (because I am almost totally ignorant about even > the bare mechanics of the SSH protocol): How could one tickle an open > SSH port and obtain from it not just its greeting banner (which may be, > and often is, rather generic and non-specific) but also so as to get > the host's host-specific public key? > > (Yes, I am indeed displaying an unforgivable level of laziness here. > I can and most probably should, and most probably eventually -will- > just go off now and read the relevant RFCs, but if anyone wants to save > me the trouble, just for this one question, that would be appreciated.)
Well, I'm not expert myself, but when I use putty from my Windows machine to talk with an ssh server that it's not seen before, I get a popup talking about the host ssh key which is new to putty., and that happens any time, e.g., the IP address of the machine changes. This query: https://www.google.com/search?q=scan+host+collect+ssh+key&ie=utf-8&oe=utf-8 reveals this tool: http://rc.quest.com/man.php?id=ssh-keyscan%281%29 which might be useful to you, and I do indeed see the man page for it on my box. Kurt _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
