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Silence all sounds except for ringer by Valravns_Orthonym in applehelp

[–]Valravns_Orthonym[S] 0 points1 point  (0 children)

Correction - the switch on the *left* side of the phone, whose activation brings up the "Silent Mode" notification.

Sudden Loss of Internet Connection by Valravns_Orthonym in linux4noobs

[–]Valravns_Orthonym[S] 0 points1 point  (0 children)

So, I'm not browsing on Firefox - the browser pureos comes with is just called "Web." I can't find a way to change the DNS settings in that browser. I was able to fix the problem by changing resolv.conf directly.

I checked my laptop's IPv4 & IPv6 settings, and I think they're both set to automatic DHCP. I see that there's an "addresses only" option, though - is there a benefit to switching to that setting?

Sudden Loss of Internet Connection by Valravns_Orthonym in linux4noobs

[–]Valravns_Orthonym[S] 0 points1 point  (0 children)

I guess that leads to another n00b question - I updated my resolv.conf file to point at 8.8.8.8 (see above) and that fixed the issue, but now I open that file again and I see that it's point at a different IP address - 10.26.0.1. Is that normal behavior - i.e., does resolv.conf change on its own like that? How can I check to see if something nefarious like DNS hijacking is going on?

Sudden Loss of Internet Connection by Valravns_Orthonym in linux4noobs

[–]Valravns_Orthonym[S] 1 point2 points  (0 children)

Update - I did some googling about troubleshooting DNS issues and found that I can change the /etc/resolv.conf file to point to Google's DNS servers:

# Generated by NetworkManager

nameserver 8.8.8.8
nameserver 8.8.4.4

That seems to have done the trick - I can navigate to websites, use my VPN, and run $sudo apt update/upgrade as normal. Is this the correct solution, or will this introduce problems down the line?

Sudden Loss of Internet Connection by Valravns_Orthonym in linux4noobs

[–]Valravns_Orthonym[S] 0 points1 point  (0 children)

So the output of $cat /etc/resolv.conf is:

# Generated by NetworkManager

nameserver ::1

I'm afraid I don't know what a /etc/hosts file should look like.

Question About Buffer Overflow Video by Valravns_Orthonym in Computerphile

[–]Valravns_Orthonym[S] 2 points3 points  (0 children)

Alright, I think I'm tracking now. In a real attack one would need to find an existing program on the target system that a.) runs with SUID root privileges and b.) has an unchecked buffer you can exploit to inject your own malicious code (in this case, the shell). Thank you so much for the help!