Hi. On Wed, Aug 05, 2020 at 07:11:12AM -0400, Dan Ritter wrote: > riveravaldez wrote: > > > > If I can ask: which is the situation, in this aspect, in a plain > > plain/straightforward Debian (net)installation? Let's say: what's the > > by-default setting of the system? > > > After install you have a powerful L3 firewall system
A small nitpick - netfilter is L4, not L3, although it can be used as such. netfilter is more than capable of matching IP-based transport level protocols and their properties. Reco