Network : localhost client ?

[Galiwyx]

Hello,

I installed Pi-Hole yesterday. I'm a relative begineer. Today I checked all client connected to the network. The first one is "Localhost" after PCs and iPhone / iPad. Do you know why there a localhost client ?

Thank you

[yubiuser]

Because the device pihole is running on (e.g. a raspberry pi) is using pihole itself for DNS resolution.

localhost

[jfb]

Localhost is the name mapped to the Pi on which Pi-hole is installed. Any DNS traffic from the Pi, including Pi-hole, will show as localhost.

 cat /etc/hosts

127.0.0.1	localhost
::1		localhost ip6-localhost ip6-loopback
ff02::1		ip6-allnodes
ff02::2		ip6-allrouters

[deHakkelaar]

@jfb

Localhost is the name mapped to the Pi on which Pi-hole is installed.

Typo, @jfb probably means "IP address on which Pi-hole is installed":

pi@noads:~ $ ip -4 -br address show lo
lo               UNKNOWN        127.0.0.1/8

---

pi@noads:~ $ dig +short chaos txt version.bind @127.0.0.1
"dnsmasq-pi-hole-2.80"

---

pi@noads:~ $ dig +short chaos txt version.bind @localhost
"dnsmasq-pi-hole-2.80"

[jfb]

@deHakkelaar

Typo, @jfb probably means "IP address on which Pi-hole is installed":

I don't. The loopback address is independent of the outward facing IP, and this is where localhost is attached.

[deHakkelaar]

You mean localhost is mapped in the hosts file to IP 127.0.0.1 that resides on the loopback interface named lo where pihole-FTL is also listening right ?

EDIT: I understand now ... the other way around being a client named localhost (query coming from loaclhost IP 127.0.0.1)