Display reverse DNS - Githubissues

csicar / Ning

Network-Scanner for Android

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Display reverse DNS #114

Open bt90 opened 2 years ago

bt90 commented 2 years ago

Ning currently only displays IP, MAC and manufacturer. It would be handy to also execute reverse DNS lookups for all discovered IPs. The local router usually has them registered with a more recognizeable device name.

Obviously this should only be done if the current DNS server being used has a local IPv4/IPv6 address.

This might also partly solve https://github.com/csicar/Ning/issues/34

csicar commented 2 years ago

That's a great idea. I'd love ti have that.

Also this should not be too hard to implement

csicar commented 2 years ago

Relevant places in the code:

probably add a reverse DNS here: https://github.com/csicar/Ning/tree/master/app/src/main/java/de/csicar/ning/scanner
call the reverse DNS scanner, if the ip is reachable here: https://github.com/csicar/Ning/blob/master/app/src/main/java/de/csicar/ning/ScanRepository.kt#L75
call updateServiceName (https://github.com/csicar/Ning/blob/master/app/src/main/java/de/csicar/ning/Dao.kt#L101) to save the new name to the db

nanderer commented 2 years ago

i give this a +1, also make sure that it is working together with tools for dns based blocking (devices dns server(s) differ from dhcp provided/default gw) like DNS66. So allways use the matching local dns for the given interface (or even try all of them together with the ip of the default gw and dhcp server)

Zefiro commented 8 months ago

I came here from Fing, which got overloaded for my simple use-case of "Finding that one new IOT device in my home". Being able to recognize the existing devices by their rDNS names is essential for me, so I'll give Ning another look once this has been added.