Raspberry Pi OS 12 (Bookworm) released

[Tim Curtis]

There is no local DNS resolver running on my ISP-provided router. (The ISP is Comcast). 

The LAN is 10.0.0.x, the router gateway is 10.0.0.1, and the router is running DHCP.

Here we see the hotspot has grabbed 10.42.0.x  for its LAN. I imagine the subnet is user-definable but I haven't explored this.

Code:

kreed@pi400:~ $ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
       inet 10.0.0.253  netmask 255.255.255.0  broadcast 10.0.0.255
       inet6 xxxx:xxx:xxxx::faa4  prefixlen 128  scopeid 0x0<global>
       inet6 fe80::6655:9a1c:2c4e:76d6  prefixlen 64  scopeid 0x20<link>
       inet6 xxxx:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:e569  prefixlen 64  scopeid 0x0<global>
       ether e4:5f:01:29:07:f7  txqueuelen 1000  (Ethernet)
       RX packets 155  bytes 52781 (51.5 KiB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 189  bytes 26374 (25.7 KiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
       inet 127.0.0.1  netmask 255.0.0.0
       inet6 ::1  prefixlen 128  scopeid 0x10<host>
       loop  txqueuelen 1000  (Local Loopback)
       RX packets 10287  bytes 898671 (877.6 KiB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 10287  bytes 898671 (877.6 KiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
       inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255
       ether e4:5f:01:29:07:f8  txqueuelen 1000  (Ethernet)
       RX packets 5869518  bytes 6426459127 (5.9 GiB)
       RX errors 0  dropped 127  overruns 0  frame 0
       TX packets 1724949  bytes 197714515 (188.5 MiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Code:

kreed@pi400:~ $ cat /etc/resolv.conf
# Generated by NetworkManager
search hsd1.md.comcast.net
nameserver 75.75.75.75
nameserver 75.75.76.76
nameserver xxxx:xxx:xxxx::1
# NOTE: the libc resolver may not support more than 3 nameservers.
# The nameservers listed below may not be recognized.
nameserver xxxx:xxx:xxxx::2
nameserver xxxx:xxx:xxxx:xxxx:xxxx:xxxx:xxxx:74b8

Note that I have full IPv6 service from my ISP and I obscure IPv6 global addresses out of (what may be) an over-abundance of caution. Someday I need to get more familiar with IPv6 security. techniques Someday.

Regards,
Kent

Interesting. My network uses the 192.168.1 address space. I'll have to see what network the AP assigns. 

Also prolly need to investigate how to assign a static address space for example 172.42.1.x if needed. I'm thinking it might not since lately it seems that pretty much everything supports mDNS or some sort of auto discovery.