Accelerating DNS parsing with pdnsd

2019-09-0109:56:39 Comment

Pdnsd is a good DNS parsing software in linux system. Compared with bind and dnsmasq, pdnsd has one advantage: it can still remember the cached entries after restarting.

1、install

pacman -S pdnsd

2、Pdnsd global setting

cp /etc/pdnsd.conf.sample /etc/pdnsd.conf

global { 
perm_cache=10240; 
cache_dir="/var/cache/pdnsd"; 
# pid_file = /var/run/pdnsd.pid; 
run_as="pdnsd"; 
server_ip = 192.168.101.133; # machines on your network to query pdnsd. 
status_ctl = on; 
# paranoid=on;       # This option reduces the chance of cache poisoning 
                   # but may make pdnsd less efficient, unfortunately. 
query_method=udp_tcp; 
min_ttl=15m;       # Retain cached entries at least 15 minutes. 
max_ttl=1w;        # One week. 
timeout=10;        # Global timeout option (10 seconds). 
neg_domain_pol=on; 
udpbufsize=1024;   # Upper limit on the size of UDP messages. 
} 

The default DNS server for pdnsd is OpenDNS (208.67.222.222/208.67.220.220), and it is said that sometimes there will be slow response problems when accessing Google with OpenDNS, so it is recommended that the DNS server for Google be replaced directly: 8.8.8 and 8.8.4.4.

3、Test

systemctl start pdnsd
nslookup www.google.com 127.0.0.1

If returned success, the PDNS configuration is successful. Now you can set pdnsd as boot start item:

systemctl enable pdnsd

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