On Wed, 2015-09-23 at 18:36 +0200, Matteo Croce wrote: > 2015-09-16 13:06 GMT+02:00 Florian Westphal <f...@strlen.de>: > > > > Matteo Croce <mat...@openwrt.org> wrote: > > > Add option to disable any reply not related to a listening socket, > > > like RST/ACK for TCP and ICMP Port-Unreachable for UDP. > > > Also disables ICMP replies to echo request and timestamp. > > > The stealth mode can be enabled selectively for a single interface. > > > > I think it would make more sense to extend the socket match > > in xtables if it can't be used to achive this already. > > > > seems like > > *filter > > :INPUT ACCEPT [0:0] > > -A INPUT -p tcp -m socket --nowildcard -j ACCEPT > > -A INPUT -p tcp -j DROP > > COMMIT > > > > Already does what you want for tcp, udp should work too. > > I'd much rather see xtables and/or nftables to be extended > > with whatever feature(s) are needed to configure such a policy > > rather than pushing this into the core network stack. > > The point is to do the filtering without *tables at all, > like /proc/sys/net/ipv4/icmp_echo_ignore_all does for pings
Yes, but this adds code in many places, even for people not caring of such protection. The point is : people wanting firewall like protections should instead use netfilter framework. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
