Hostname showing in the webinterface and multiple IPs

Installing and Using OpenWrt
1

Hello,

I have a OpenWRT 23.05 and some Raspies behind (LAN/WLAN). The Raspies are connected with LAN and WLAN, one example:

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether b8:27:eb:89:0b:db brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.109/24 brd 192.168.1.255 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 192.168.1.214/24 brd 192.168.1.255 scope global secondary dynamic eth0
       valid_lft 29175sec preferred_lft 29175sec
    inet6 fd76:fc69:e03d::e83/128 scope global dynamic noprefixroute
       valid_lft 42258sec preferred_lft 42258sec
    inet6 fd76:fc69:e03d:0:ab3b:2e02:2997:828a/64 scope global mngtmpaddr noprefixroute
       valid_lft forever preferred_lft forever
    inet6 fe80::ba27:ebff:fe89:bdb/64 scope link
       valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether b8:27:eb:dc:5e:8e brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.215/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
       valid_lft 42923sec preferred_lft 37523sec
    inet6 fd76:fc69:e03d::b56/128 scope global dynamic noprefixroute
       valid_lft 42928sec preferred_lft 42928sec
    inet6 fd76:fc69:e03d:0:f98b:20de:7f8d:19b3/64 scope global mngtmpaddr noprefixroute
       valid_lft forever preferred_lft forever
    inet6 fe80::d2d:1c5e:47b7:9662/64 scope link
       valid_lft forever preferred_lft forever

The strange thing is, OpenWRT show one IP with hostname and one IP not:

grafik
grafik891×409 59.6 KB

Any ideas why?

2

iPhone connected via WiFi

3

Yes, I have Iphones connected to the network via WLAN, but what does that have to do with the Raspies?

4

It has a DHCP server turned on that assigns IP to devices.

5

But if a Fritz!Box is the DHCP-Server, all hostnames are displayed correct? And I find no informations to disable a DHCP-Server on a Iphone?

6

Sorry but I'm confused what is connected where. Are these your Rasbians' MACs or some other (I thought iPhones)

7

Sorry, yes: a Raspi have a LAN and WLAN device, both are connected to the OpenWRT Router:

MAC: b8:27:eb:89:0b:db
IP: 192.168.1.214
Device: eth0

MAC: b8:27:eb:dc:5e:8e
IP: 192.168.1.215
Device: wlan

One show the correct hostname and the second have no hostname in the webinterface from OpenWRT.

8

I wouldn't worry about that at all. It has to read the name from the device for it to be visible, so it depends on what services are enabled or how its firewall is configured.

1 Like
9

Are you saying that:

  • you connected the same Pi mutiple times (e.g. wireless and wired); or
  • that all your Pi devices have the same hostname?

Both would cause a host (that has announced a hostname) to appear without a hostname.

Another poster mentioned devices that don't announce hostnames (e.g. iPhones).

10

My point is, that a Raspi with LAN/WLAN are connected to OpenWRT at the same time. One Pi have 2 IP's with 2 NIC's. But in the Webinterface only one IP from this Raspi have a hostname (pi3 from my screenshot). The other one have just a "-".

11

You cannot have 2 IPs with the same hostname. DNS would not know which address to resolve to.

If you want both the LAN and WLAN IPs to have a hostname, you could set static IPs with different hostnames.

1 Like
12

Thank you, thats it.

13

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