François Patte wrote: >>> The problem is: how an IP from a private network (10....) could reach >>> my machine through the internet? Tim: >> WiFi? François Patte: > I don't understand your question. The machine is connected to the box > with an ethernet cable? It was a thought that maybe there was more one network connection involved. We don't know your LAN. Many home modem/routers also have WiFi, and it can use a different private IP range for the WiFi as a way of separating ethernet data from WiFi data. >> Smart devices within your home? > What do you call "smart devices"? Something like Amazon Alexa? No, I > haven't. Yes, term "smart devices" is a bit misnamed, it really just means things that are network controllable, but never used to in the past, it doesn't necessarily mean they're actually smart. So, as well as things like Alexa, there's light bulbs, doorbells, timer switches, heating controllers, electric car chargers, etc. >> Does your ISP have real public IPs, or are they NATing you? > How can I know this? > > ifconfig reports 3 IP addresses: > - 192.168.1.16 which is my private network That's a private IP. I presume your computer goes through a modem/router between you and the ISP? Normally that blocks other private IPs from being able to connect. If you have a modem/router, looking at its configuration to see what its public address is will tell you. If you are directly connected to your ISP (no modem or router) with such an IP, then the ISP is doing Network Address Translation. Many years ago my ISP used the 10.0.0.0 range for its own internal services (mail, web, news, etc), though you'd only know it by looking at mail headers of the things it passed through. As things went in and out of them, the connections to everything outside of them were using public IPs. Normally such IPs (10.x.y.z ranges) can't traverse from one network to another, but if an ISP is already doing NAT for you, they could do something that breaks the rules. > and 2 IP V6 : > - fe80:.... my private network > - 2a01:cb14:.... routable IP from my ISP (Orange) I'd probably discount them being part of a problem with a 10.x.y.z IPv4 address. You'd need to have some IPv6 to IPv4 gateway for something to be able to cross over. Do you have other things connected to your LAN? Things that are sometimes connected to another network? When reconnecting to your network they can first try using their prior address, then try to use an address from your own LAN. The other thing that springs to mind is IP spoofing. That those connection attempts come from something that faked its real IP. But I'm leaning towards thinking it's something within your ISP. -- uname -rsvp Linux 3.10.0-1160.76.1.el7.x86_64 #1 SMP Wed Aug 10 16:21:17 UTC 2022 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
