Quick report -
So I didn't test pihole per say, but used that method of storing the
blacklist into the hosts file for dnsmasq to use. Dnsmasq must use a
different storage method for its hosts file. I loaded 850439 entries in
the hosts file and restarted dnsmasq. I uses 1/2 as much memory than if
loaded as a conf-file like adblock does. And its super fast and
virtually non existent cpu usage. DNS lookups perform just like it
should. Though the hosts file is now returning an IP address I
specified for the blocked hosts - would have been nice to do the
nxdomain. Think this will work for my needs, I can put a second IP
address on the router and run pixelserv on it or something like that.
Cheers
Derek
On 12/29/2016 11:11 AM, Dave Taht wrote:
On Thu, Dec 29, 2016 at 8:09 AM, TheWerthFam <thewerth...@gmail.com> wrote:
Right now I'd rather not customize the code. There are two directions I'm
going to try first.
Give unbound a try to serve DNS, keeping Dnsmasq for DHCP. If that doesn't
work try converting the list to a hosts file pointing to a local pixelsrv
address. There are some other blog posts that indicate that the hosts file
can handle a lot more entries. Like https://github.com/pi-hole/pi-hole
Maybe just run pi-hole on openwrt.
Well, I've had a bit of fun feeding large blocklists into cmph. Using
the "chd" algorithm, it creates an index file from a 24MB blocklist
into a 800K one. (but you still need the original data and a secondary
index) I also fiddled a bit with bloom filters, which strike me as
appropo. It seems feasible to establish a large dataset of read-only
data with a fast index (that can be discarded in low memory
situations, rather than swapped out)
I'll take a look at pi-hole...
Cheers
Derek
On 12/28/2016 02:21 PM, Dave Taht wrote:
On Tue, Dec 27, 2016 at 11:03 PM, TheWerthFam <thewerth...@gmail.com>
wrote:
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.
I've been thinking about this, and given the large amount of active
data in a very small memory space have been thinking that another
approach would be more fruitful. Convert the giant table into a
"minimally perfect hash", and mmap it into memory read-only, so it can
be discarded under memory pressure, unlike ipset, squid, or dnsmasq
based approaches.
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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