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gnunet-nat-server - help GNUnet setup test network setup with NAT


gnunet-nat-server [options] PORT


Normal GNUnet end-users should not concern themselves with gnunet-nat-server. In fact,
distributions are encouraged to consider not shipping it at all. Running
gnunet-nat-server's is similar to running hostlist servers: it is a special service to the
community with special requirements and no benefit to those running the service.

This program will listen on the specified PORT for incoming requests to test a peer's
network connectivity. Incoming requests can ask it to connect to a given IPv4 address
(and port) using TCP or UDP and to send a 2-byte test message using the specified address.
The program can also be asked to send a "fake" ICMP response message to a given IPv4
address (for autonomous NAT traversal --- see the description in the respective research

The idea is that gnunet-nat-server will be run on some trusted hosts with unrestricted
connectivity to allow GNUnet users to test their network configuration. As written, the
code allows any user on the Internet to cause the gnunet-nat-server to send 2-bytes of
arbitrary data to any TCP or UDP port at any address. We believe that this is generally

When running gnunet-nat-server, make sure to use a configuration that disables most NAT
options but enables 'enable_nat_client' and sets 'internal_address' to the global IP
address of your local host. Also, the gnunet-helper-nat-client should be installed
locally and run with root privileges (SUID), otherwise the gnunet-nat-server will not work

Note that gnunet-nat-server could be run via gnunet-arm but typically is not. Also, the
name of the host and port that gnunet-nat-server is run on should be specified in the
NATSERVER option in the [setup] section of the configuration file of hosts that are
supposed to autoconfigure with this server.


Use the configuration file FILENAME.

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