-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tuesday, 2017-12-19 at 22:05 +0300, Andrei Borzenkov wrote:
19.12.2017 22:02, Carlos E. R. пишет:
On Tuesday, 2017-12-19 at 21:59 +0300, Andrei Borzenkov wrote:
19.12.2017 21:58, Carlos E. R. пишет:
On Tuesday, 2017-12-19 at 21:55 +0300, Andrei Borzenkov wrote:
19.12.2017 21:36, Carlos E. R. пишет:
But they never can interconnect directly, this is denied.
There is UDP hole punching technique that creates port forwarding entries between two public addresses; this still requires external liaison which knows both public addresses to assist. The difference with e.g. TeamViewer is that traffic then does not go through third-party server which is arguably more secure.
Can this work with two cascaded NAT? :-?
One at the router, another at the ISP.
Does NTP client that accesses public server work in this case?
I have no idea, sorry. We would have to ask the OP.
But I assume anything can be reached from the inside /if/ a connection is stablished. Not if a connection back is expected.
What is the point of connection if you cannot get reply back?
UDP hole punching will work as long as all NAT routers establish reverse entry to forward back reply. Of course there can be situation where ISP explicitly allows only specific ports/protocols, then no hole punching is possible.
Ah, I see now what you mean. :-) - -- Cheers, Carlos E. R. (from openSUSE 42.2 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlo5ZBgACgkQtTMYHG2NR9U5VQCfXYqhfLC6f39KLxtUBvxd6PbC vrcAn0IYRzR88iRXAMUqpzDHq2D4jCji =OnPm -----END PGP SIGNATURE-----