Brian wrote at 2012-06-02 08:13 -0500: > On Sat 02 Jun 2012 at 12:41:22 +0200, Claudius Hubig wrote: > > Do you have a have public IP address (either IPv4 or IPv6)? If > > that is not the case, you will need a third party in order to > > establish the connection. > > A third party is not required. For the occasional transfer of files the > address (if it changes) may be obtained from the router and emailed to > the friend. Brian, you seem to be assuming that the router has a public IP (on the WAN side), which is often not true. Unfortunately, many ISPs provide their customers with only private/local IPs behind NAT; inbound connections are therefore not possible unless the ISP agrees to forward a particular port or port range.
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