[asio-users] Transfering information about connections behind NAT

[Jim Sager]

If the connection is not behind a NAT, you can just send it's port and IP address to someone and they can connect.

How do you transfer information about a connection behind a NAT so that another connection which may be behind a NAT can connect?

[Nicolas Alvarez]

Post by Jim Sager
If the connection is not behind a NAT, you can just send it's port and IP
address to someone and they can connect.
How do you transfer information about a connection behind a NAT so that
another connection which may be behind a NAT can connect?

If both connections are under a NAT, I don't think it's possible at all to
get a direct connection between them. Unless you use UPnP to open a port
(but then you could say you aren't under a NAT anymore).

[Simon Perreault]

Post by Nicolas Alvarez
If both connections are under a NAT, I don't think it's possible at all to
get a direct connection between them.

Just to nitpick... It's possible unless both NATs use address and/or
port-dependent mapping (e.g. symmetric NATs).

[Djibril'']

Post by Simon Perreault

Post by Nicolas Alvarez
If both connections are under a NAT, I don't think it's possible at all to
get a direct connection between them.

Just to nitpick... It's possible unless both NATs use address and/or
port-dependent mapping (e.g. symmetric NATs).

But still I don't know ehr to say that if you are using antivirus like Kaspersky
then your connection gets some delay injected ( i used boost asio 1.47, default
http_server example.)