Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Thu, 28 Oct 2021 21:48:13 -0700

On 10/28/21 3:59 PM, Paduan Donadio, Marcio via Tech-talk wrote:
> $ sudo iptables -L -t nat

Use 'sudo iptables-save' to print all tables, not just 'nat'.
Also check both host and container.

> DNAT       udp  --  anywhere             <server name>  udp dpt:5064 to:134.79.219.255

It might be simpler while troubleshooting to remove any *NAT or
MASQUERADE targets and test only the connection between the
container and the host.

fyi. one quick check for firewall is to connect to the TCP port
of a CA or PVA server with 'telnet'.  Seeing a TCP connection
establish is sufficient.  Also, PVA, and newer CA, servers will
send a message on connection.  eg.

> $ telnet localhost 5075
> Trying 127.0.0.1...
> Connected to localhost.
> Escape character is '^]'.
> �A�@    anonymousca^]
> telnet> q
> Connection closed.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System