bind listening on UDP port 53 using 2 fd

[Bernardo]

Hi all,

Is it normal to see bind listening on UDP port 53 using 2 fd?

udp     UNCONN   0        0          192.168.10.100:53            0.0.0.0:*
     users:(("named",pid=4205,fd=512))
udp     UNCONN   0        0          192.168.10.100:53            0.0.0.0:*
     users:(("named",pid=4205,fd=15))
tcp     LISTEN   0        10         192.168.10.100:53            0.0.0.0:*
     users:(("named",pid=4205,fd=17))
tcp     LISTEN   0        128             127.0.0.1:953           0.0.0.0:*
     users:(("named",pid=4205,fd=21))

Does this make any sense?

According to "rndc status" command "UDP listeners per interface: 1"

# rndc status
version: BIND 9.16.6 (Stable Release) <id:25846cf>
running on ns2: Linux x86_64 5.3.18-lp152.60-default #1 SMP Tue Jan 12
23:10:31 UTC 2021 (9898712)
boot time: Sat, 23 Jan 2021 10:14:09 GMT
last configured: Sat, 23 Jan 2021 10:14:09 GMT
configuration file: /etc/named.conf (/var/lib/named/etc/named.conf)
CPUs found: 1
worker threads: 1
UDP listeners per interface: 1
number of zones: 156 (0 automatic)
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 0
query logging is ON
recursive clients: 0/900/1000
tcp clients: 0/150
TCP high-water: 1
server is up and running



-- 
Bernardo


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