Networking – Who owned 192.168.x.x IP address

ipnetworkingrouter

I am confused about the meaning of 192.168.x.x (private network). In DSL bridge mode, my computer has been assigned an IP as part of ISP's private network such as 36.82.x.x. It also can connect to the outside world through an public IP.

In LAN, 192.168.1.1 will be my router, 192.168.1.x is another computers connected to the router (as assigned by DHCP server).

I would like to know what is the rule if I connect to DSL network? I can still see 192.168.1.1 but this is not my own router. Scanning this range shows that there are also several live IPs such as 192.168.1.161, 192.168.1.162, etc. They are not part of my private network.

Edit:

I'm doing nmap scan to 192.168.1.0/24 while in bridging mode. I can see several IPs are alive which are not mine. I don't know much about how bridging to ISP works, but I assume that after bridging, 192.168.x.x are not my private network.

Add Output:

# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> ...
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> ...
    ...
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> ...
    ...
5: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> ...
    link/ether f8:d1:11:bc:9f:06 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fad1:11ff:febc:9f06/64 scope link
       valid_lft forever preferred_lft forever
6: ppp0: <POINTTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> ...
    link/ppp
    inet 125.164.x.x peer 125.164.x.x/32 brd 125.164.x.x scope global ppp0

# traceroute 192.168.1.1
traceroute to 192.168.1.1 (192.168.1.1), 30 hops max, 60 byte packets
 1 125.164.xx.1  
 2 125.164.xx.1
 3 118.98.xx.xx
 4 61.94.xx.xx
 5 61.94.xx.xx
 6 118.98.xx.xx
 7 118.98.xx.xx
 8 192.168.1.1

It requires 8 hops to reach 192.168.1.1.

Best Answer

It appears that your ISP uses 192.168.1.0/24 for something inside their network. When you are bridged to their network, you see whatever they've setup machines on their network to see. It's possible that someone messed up and these were intended to be private, but it's also possible that they were intended to be reachable by you.

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