IF top shows a connection between my PC and 10.1.1.1

Support Network
1

Hi all,
Okay, I’m worried. Why does my PC do that?
Thanks
Melissa

2

Maybe it’s your subnets gateway?

10.1.1.1 does not seem to be “pingable” from the internet.

3

can you post output of “ip route”?

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4

well, my network is not in that range…it’s 192.168.x.x…that is weird…

5

hang on…

6

It’s this:

default via 192.168.1.1 dev enp1s0 proto dhcp metric 100 
192.168.1.0/24 dev enp1s0 proto kernel scope link src 192.168.1.12 metric 100
7

10.x.x.x is a private address range - it is often used by ISP - especially on celluar connections.

It may also be used when your connection is part of a larger private network - ISP network.

The ip may also be used by VirtualBox or VMware when creating the network interfaces for the guest and a guest system will operate on 10.x.x.x but the host will also see the 10. address

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8

okay, I’ll check with my ISP. Could be just that. Since I dont even “live” in that range, this struck me as strange…

9

Are you using docker?

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10

we could check “ip addr show”, there it should show all interfaces from docker or virtualbox

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11

no, not using docker. I noticed that the triad was 192.168.1.44, 224.0.0.251 and 10.1.1.1.
Now, as I called the ISP, they explained that the moden responds to either 10.1.1.1 or 192.168.1.1, and 224.0.0.251 is connected to itunes. Which…is weird, but possible…
and…I learned something again :smile_cat:
ip addr show:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether dd:dd:dd:dd:dd:dd brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.12/24 brd 192.168.1.255 scope global dynamic noprefixroute enp1s0
       valid_lft 2879sec preferred_lft 2879sec
    inet6 2a02:a03f:877e:9a00:b8bc:56ee:ca56:e0a8/64 scope global dynamic noprefixroute 
       valid_lft 86393sec preferred_lft 71993sec
    inet6 fe80::e8a1:cf5:10a4:75fb/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

(MAC is smudged…)

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12

Nothing weird. There can be multiple IPs on a single interface. And routers can also have multiple loopback addresses configured. If you access router via web, you can probably reach it via both IPs.

224.0.0.0/4 are multicast addresses. .251 = mDNS.

Also to comment on “well, my network is not in that range…it’s 192.168.x.x…that is weird…”:
You constantly connect to other networks while you are on the internet for example. That’s the whole point of a router - it routes packets to other networks. =)

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