Thanks for the feedback, I'll look into NFQUEUE. I'm forcing the use of
my dns by iptables. I'm also using a transparent squid and e2guardian
to filter content. I like the idea of the dns based blacklist to add
some filtering capabilities since I don't want to try and filter https
types sites. I know no solution in perfect.
Cheers
Derek
On 12/27/2016 01:53 PM, philipp_s...@redfish-solutions.com wrote:
On Dec 26, 2016, at 10:32 AM, TheWerthFam <thewerth...@gmail.com> wrote:
Using the adblock set of scripts to block malware and porn sites. The porn
sites list is 800,000 entries, about 10x the number of sites adblock normally
uses. With the full list of malware and porn domains loaded, dnsmasq takes
115M of memory and normally sits around 50% CPU usage with moderate browsing
usage. CPU and RAM usage isn't really a problem other than lookups are slow
now. Platform is cc 15.05.1 r49389 on banana pi r1.
The adblock script takes the different lists, creates files in /tmp/dnsmasq.d/
entries looking like
local=/domainnottogoto.com/ one entry per line. The goal is to return
NXDOMAIN to entries in the lists. Lists are sorted and with unique entries.
I've tried increasing the cachesize to 10,000 but that made no change. Tried
neg-ttl=3600 with default negative caching enabled with no change.
Are there dnsmasq setting that will improve the performance? or should it be
configured differently to achieve this goal?
Perhaps unbound would be better suited?
Cheers
Derek
Not to rain on your parade, but the obvious defeat of this solution would be to
point to an external website which does DNS lookups for you, and then edit the
URL to have an IP address in place of the host name.
I would use netfilter’s NFQUEUE and make a user-space decision based on
packet-destination (since it seems you’re filtering outbound traffic requests).
After all, it’s not the NAME you don’t want to talk to… it’s the HOST that
bears that NAME.
-Philip
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