[artix-general] iptables blocking dns queries

Ruben Safir ruben at mrbrklyn.com
Fri Aug 20 18:43:56 CEST 2021


On Fri, Aug 20, 2021 at 04:08:23PM +0000, Qontinuum wrote:
> On Fri, Aug 20, 2021 at 11:48:40AM -0400, Ruben Safir wrote:
> > I don't understand how they can move to nft if nft isn't close to being
> > finished with no string matching?  Doesn't this leave firewalls across
> > the entire internet exposed?
> 
> nft is already enough for a great majority of use cases for a long time
> now.
> 
> I don't know if it support string matching but as already stated it has
> raw expressions. Also, people don't expose private services to internet
> and they use specialized software to do DPI.


I restarted the box and the new kernel seems to work better, but  now it
is stuck on hexstring

[www3 ~]# /sbin/iptables-legacy -I INPUT -p udp --dport 53 -m string
--hex-string '|03|www|08|pizzaseo|03|com|' -–algo bm -j DROP
iptables v1.8.7 (legacy): unknown option "|03|www|08|pizzaseo|03|com|"


hexstring has to get an argument of that format so I am lost as to its
complaint

> 
> -- 
> qontinuum



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