1.1.1.1 getting blocked by avahi?

[nahventure]

That special 1.1.1.1 interface only comes up temporarily during boot time.

Is there a way I can disable this? It doesn't go away and seems to route it still, can't use 1.1.1.1 for anything.

Here's dig and nslookup.

Spoiler: dig

nahventure@ROUTER:/tmp/home/root# dig google.com @1.1.1.1
; <<>> DiG 9.12.3-P4 <<>> google.com @1.1.1.1
;; global options: +cmd
;; connection timed out; no servers could be reached

Spoiler: nslookup

C:\Users\nahventure>nslookup google.com 1.1.1.1
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 1.1.1.1
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out

 

[ColinTaylor]

What do you get on your router from these commands?

ifconfig -a

netstat -rn

 

[nahventure]

What do you get on your router from these commands?

ifconfig -a

netstat -rn

Spoiler: ifconfig -a

nahventure@ROUTER:/tmp/home/root# ifconfig -a
aux0 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:291173 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23324659 (22.2 MiB) TX bytes:0 (0.0 B)
Interrupt:180 Base address:0x5000
br0 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
inet addr:172.16.1.1 Bcast:172.16.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:1617562 errors:0 dropped:0 overruns:0 frame:0
TX packets:1416184 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:183464176 (174.9 MiB) TX bytes:443753637 (423.1 MiB)
br0:0 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
inet addr:169.254.39.251 Bcast:169.254.39.255 Mask:255.255.255.0
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
eth0 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:25010381 errors:0 dropped:0 overruns:0 frame:0
TX packets:13949333 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4031990672 (3.7 GiB) TX bytes:843864043 (804.7 MiB)
Interrupt:181 Base address:0x6000
eth1 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:9136509 errors:0 dropped:0 overruns:0 frame:4790606
TX packets:16878570 errors:2 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2475469139 (2.3 GiB) TX bytes:3191504574 (2.9 GiB)
Interrupt:163
ifb0 Link encap:Ethernet HWaddr F2:25:59:E6D:08
BROADCAST NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
ifb1 Link encap:Ethernet HWaddr 26:74:89:5D:24:20
BROADCAST NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MULTICAST MTU:16436 Metric:1
RX packets:481305 errors:0 dropped:0 overruns:0 frame:0
TX packets:481305 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:113449889 (108.1 MiB) TX bytes:113449889 (108.1 MiB)
lo:0 Link encap:Local Loopback
inet addr:127.0.1.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MULTICAST MTU:16436 Metric:1
tun21 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 -00
inet addr:10.8.0.1 P-t-P:10.8.0.1 Mask:255.255.255.0
UP POINTOPOINT RUNNING NOARP PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
vlan1 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:1308591 errors:0 dropped:0 overruns:0 frame:0
TX packets:2237177 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:171540695 (163.5 MiB) TX bytes:1449886886 (1.3 GiB)
vlan2 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E8
inet addr:192.168.1.36 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:23992963 errors:0 dropped:0 overruns:0 frame:0
TX packets:11891610 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:29517273762 (27.4 GiB) TX bytes:3582803698 (3.3 GiB)
wl0.1 Link encap:Ethernet HWaddr AC:9E:17:48:EF:E9
UP BROADCAST RUNNING ALLMULTI MULTICAST MTU:1500 Metric:1
RX packets:2284739 errors:0 dropped:0 overruns:0 frame:4790606
TX packets:6599007 errors:1 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1042463361 (994.1 MiB) TX bytes:3682780667 (3.4 GiB)

Spoiler: netstat -rn

netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 vlan2
169.254.39.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
10.8.0.0 0.0.0.0 255.255.255.0 U 0 0 0 tun21
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 vlan2
172.16.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 vlan2
nahventure@ROUTER:/tmp/home/root#

pastebin since it turned out ugly in spoiler, https://pastebin.com/vEWaieym

 

[ColinTaylor]

Well I can't see any trace of 1.1.1.1 or a subnet that would contain it.

What happens if you try a "ping 1.1.1.1" from the router?

EDIT: Are you using DNS Filter? What is the output of "iptables-save"?

 

[RMerlin]

Is there a way I can disable this? It doesn't go away and seems to route it still, can't use 1.1.1.1 for anything.

Here's dig and nslookup.

Spoiler: dig

nahventure@ROUTER:/tmp/home/root# dig google.com @1.1.1.1
; <<>> DiG 9.12.3-P4 <<>> google.com @1.1.1.1
;; global options: +cmd
;; connection timed out; no servers could be reached

Spoiler: nslookup

C:\Users\nahventure>nslookup google.com 1.1.1.1
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 1.1.1.1
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
*** Request to UnKnown timed-out

No, it's not a feature, it's how the architecture was designed for that router model.

That interface should only be there during boot time, so it won't interfere with normal usage once it's fully initialized.

 

[grifo]

It works on my 87U:

grifo@r1:/tmp/home/root# nslookup google.com 1.1.1.1
Server:    1.1.1.1
Address 1: 1.1.1.1 one.one.one.one

Name:      google.com
Address 1: 2a00:1450:4002:801::200e mil04s03-in-x0e.1e100.net
Address 2: 216.58.205.110 mil04s26-in-f14.1e100.net
grifo@r1:/tmp/home/root#

My logs also show avahi-daemon registering 1.1.1.1 on the LAN interface but then it gets withdrawn.

Sep  5 18:04:08 r1 avahi-daemon[1987]: avahi-daemon 0.7 starting up.
Sep  5 18:04:08 r1 avahi-daemon[1987]: WARNING: No NSS support for mDNS detected, consider installing nss-mdns!
Sep  5 18:04:08 r1 avahi-daemon[1987]: No service file found in /tmp/avahi/services.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Loading new alias name RT-AC87U.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Joining mDNS multicast group on interface br2.IPv4 with address 192.168.202.254.
Sep  5 18:04:08 r1 avahi-daemon[1987]: New relevant interface br2.IPv4 for mDNS.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Joining mDNS multicast group on interface br1.IPv4 with address 192.168.201.254.
Sep  5 18:04:08 r1 avahi-daemon[1987]: New relevant interface br1.IPv4 for mDNS.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Joining mDNS multicast group on interface br0.IPv4 with address 1.1.1.1.
Sep  5 18:04:08 r1 avahi-daemon[1987]: New relevant interface br0.IPv4 for mDNS.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Joining mDNS multicast group on interface lo.IPv4 with address 127.0.1.1.
Sep  5 18:04:08 r1 avahi-daemon[1987]: New relevant interface lo.IPv4 for mDNS.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Network interface enumeration completed.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 192.168.202.254 on br2.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 192.168.201.254 on br1.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 1.1.1.1 on br0.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 169.254.39.93 on br0.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 192.168.1.254 on br0.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 127.0.1.1 on lo.IPv4.
Sep  5 18:04:08 r1 avahi-daemon[1987]: Registering new address record for 127.0.0.1 on lo.IPv4.
Sep  5 18:04:09 r1 avahi-daemon[1987]: Server startup complete. Host name is RT-AC87U-6BD0.local. Local service cookie is 1739969676.
Sep  5 18:04:09 r1 avahi-daemon[1987]: Alias name "RT-AC87U" successfully established.
Sep  5 18:04:09 r1 kernel: br1: port 2(wl0.1) entering forwarding state
Sep  5 18:04:09 r1 kernel: br1: port 1(vlan201) entering forwarding state
Sep  5 18:04:09 r1 kernel: br2: port 1(vlan202) entering forwarding state
Sep  5 18:04:09 r1 kernel: ip_set: protocol 6
Sep  5 18:04:24 r1 avahi-daemon[1987]: Withdrawing address record for 1.1.1.1 on br0.
Sep  5 18:04:24 r1 avahi-daemon[1987]: Leaving mDNS multicast group on interface br0.IPv4 with address 1.1.1.1.
Sep  5 18:04:24 r1 avahi-daemon[1987]: Joining mDNS multicast group on interface br0.IPv4 with address 169.254.39.93.