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Privoxy

For this to work, the following log items need enabled for Privoxy.

debug     2 # show each connection status
debug   512 # Common Log Format
debug  1024 # Log the destination for requests Privoxy didn't let through, and the reason why.
debug  4096 # Startup banner and warnings
debug  8192 # Non-fatal errors

Install prerequisites

apt-get install libjson-perl libmime-base64-perl libfile-slurp-perl libfile-readbackwards-perl libipc-run3-perl cpanminus
cpanm Time::Piece

pkg install p5-JSON p5-MIME-Base64 p5-File-Slurp p5-File-ReadBackwards p5-IPC-Run3 p5-Time-Piece

cpanm Time::Piece JSON MIME::Base64 File::Slurp File::ReadBackwards IPC::Run3

SNMP Extend

  1. Download the extend and make sure it is executable. 

    wget https://github.com/librenms/librenms-agent/raw/master/snmp/privoxy -O /etc/snmp/privoxy
chmod +x /etc/snmp/privoxy

  2. Add the extend to snmpd.conf and restart snmpd.

extend privoxy /etc/snmp/privoxy

If your logfile is not at /var/log/privoxy/logfile, that may be changed via the -f option.

If privoxy-log-parser.pl is not found in your standard $PATH setting, you may will need up call the extend via /usr/bin/env with a $PATH set to something that includes it.

Once that is done, just wait for the server to be rediscovered or just enable it manually.

Cron

If you are having timeouts or there is privelege seperation issues, then it can be ran via cron like below. -w can be used to write it out and -o can be used to control where it is written to. See --help for more information.

Add the following to your /etc/crontab.d/librenms_privoxy: 

*/5 * * * * root /etc/snmp/privoxy -w > /dev/null

Add/Change the following to your /etc/snmp/snmpd.conf:

extend privoxy /bin/cat /var/cache/privoxy_extend.json.snmp