On Fri, 16 Dec 2022, Justin Pryzby wrote:
...
That limitation isn't due to shorewall but rather networking in general.
You can't know and certainly couldn't trust the username from a remote
system (like "identd"), and loopback has the same limitation.

Any ideas on how to handle this in shorewall, short of fiddling with the
application to make sure it doesn't bind to the loopback interface, please?

You could drop packets directed to fw:1332
...

Thanks Justin,

Mark


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