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Forum Discussion
gb777
Jun 29, 2020Apprentice
lack of DHCP-linked DNS view
Hi, my old router (LInksys E4200) provided a DHCP-linked DNS view. When I added a local computer to my network, it responded to DNS queries for its name with its address. The AX4200/RBR750 I jus...
schumaku
Jun 30, 2020Guru
gb777 wrote:A number of daemons appear to related to BitDefender, a service I do not use or know of.
Netgear does make use of BitDefender (and probably some more) under the name Netgear Armor where e.g. BitDefender vulnerabiity scans are run from the router on all attached devices.
gb777 wrote:Then, there is a directory /tmp/aws_json_dir that contains a number of files with the result of a Fing scan of my network. ... but they do send the DHCP fingerprint of all devices located on my local network to a server in the AWS cloud (there's a program called 'aws_json' that appears to do that.)
Just guessing - this is probably related to have a more or less complete inventory on the attached devices to run adjusted scans. Ok, I?m wearing my green glasses today.
gb777 wrote:So Netgear doesn't implement a DHCP-linked DNS view, ... Ironically, this includes whether the DHCP client used option 12.
Interesting priorities.
Have looked into the R9000 here again - no Armor so luckily none of the above. However of course typical behaviour:
- Appears dnsmasq (v2.80 as I nagged - and of course that's carried ahead to other newer products - there are known vulnerabilities on 2.78 and 2.79 ... so why bother, Netgear?) is built here _with_ DHCP support, but there is no DHCP config.
- Instead, the Busybox (one of my favourites due to the very incomplete shell functionality) integrated udhcpd (and udhcpc) seems to be in place now.
- Checking the config does show:
---
root@R9000-1:/# cat /tmp/udhcpd.conf
pidfile /var/run/udhcpd.pid
start 192.168.10.1
end 192.168.10.253
interface br0
remaining yes
auto_time 5
lease_file /tmp/udhcpd.leases
---
While the /tmp/udhcpd.leases file does exist, it's never touched or updated - obviously a bug. OK, I'm testing with Android 10 and 11 systems not providing a host name.
---
root@R9000-1:/# ls -als /tmp/udhcpd.leases
0 -rw-r--r-- 1 root root 0 Jan 1 1970 /tmp/udhcpd.leases
---
This would make updating the local DNS somewhat difficult. Same on your Orbi gb777 ?
These are the reasons why there is still no local DHCP-hostname DNS update.
Christian_R please share these issues and bugs with the consumer business unit...
gb777 wrote:Interesting priorities. I haven't even checked what privacy policies I must have agreed to when buying this device that allows them to scan and fingerprint my network (including MAC addresses, OS versions, Hardware guesses, etc.) and collect this information.
Security software under the Armor label does certainly sell better than a DHCP-DNS integration - especially as it is bundling the BitDefender for Android, iOS (somewhat basic), Windows, and MacOS for the customer's client devices.
gb777 wrote:FWIW, Fing doesn't appear to be high quality software, fortunately. It scanned my Linux machines as running Windows.
Wondering for a longer time why some of the WIndows 10 systems here are identified (e.g. by the free Fing App or Windows part) Apple MacOS systems.
And yes, it's always interesting looking under the hood of consumer devices....
gb777
Jun 30, 2020Apprentice
schumaku wrote:
gb777 wrote:So Netgear doesn't implement a DHCP-linked DNS view, ... Ironically, this includes whether the DHCP client used option 12.
Interesting priorities.
Have looked into the R9000 here again - no Armor so luckily none of the above. However of course typical behaviour:
- Appears dnsmasq (v2.80 as I nagged - and of course that's carried ahead to other newer products - there are known vulnerabilities on 2.78 and 2.79 ... so why bother, Netgear?) is built here _with_ DHCP support, but there is no DHCP config.
- Instead, the Busybox (one of my favourites due to the very incomplete shell functionality) integrated udhcpd (and udhcpc) seems to be in place now.
- Checking the config does show:
---
root@R9000-1:/# cat /tmp/udhcpd.conf
pidfile /var/run/udhcpd.pid
start 192.168.10.1
end 192.168.10.253
interface br0
remaining yes
auto_time 5
lease_file /tmp/udhcpd.leases
---
While the /tmp/udhcpd.leases file does exist, it's never touched or updated - obviously a bug. OK, I'm testing with Android 10 and 11 systems not providing a host name.
---
root@R9000-1:/# ls -als /tmp/udhcpd.leases
0 -rw-r--r-- 1 root root 0 Jan 1 1970 /tmp/udhcpd.leases
---This would make updating the local DNS somewhat difficult. Same on your Orbi gb777 ?
No, my udhcpd.leases has stuff in it, e.g.
00000540 52 42 53 37 35 30 00 00 00 00 00 00 00 00 00 00 |RBS750..........| 00000550 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
Christian_R please share these issues and bugs with the consumer business unit...
gb777 wrote:Interesting priorities. I haven't even checked what privacy policies I must have agreed to when buying this device that allows them to scan and fingerprint my network (including MAC addresses, OS versions, Hardware guesses, etc.) and collect this information.
Security software under the Armor label does certainly sell better than a DHCP-DNS integration - especially as it is bundling the BitDefender for Android, iOS (somewhat basic), Windows, and MacOS for the customer's client devices.
I wonder if BitDefender flags the RBR devices itself.
BTW, this edit widget is completely screwed up, at least for me. I can't unquote parts of the message, so my responses above are at the wrong indentation level. Oh well.