OUTLINE: Disable IPv6
I've seen lots of posts about problems with IPv6 (slow network/Internet connections, DNS resolution problems, etc.). I've also seen several posts presenting solutions to these issues. Herewith, what I had to do to disable IPv6 and get reasonable connection & DNS speeds.
1. sudo gedit /etc/modprobe.d/aliases (or your preferred text editor)
2. Find the line: alias net-pf-10 ipv6
3. Edit this to: alias net-pf-10 off
4. Save the file and reboot
Please note that many of the suggestions I've seen recommend running the command sudo update-modules before rebooting; whenever I've done this, I still see IPv6 active (i.e., the sit0 section when running ifconfig -a) and still experience the network performance problems.
Finally, with Mozilla browsers (Firefox or Suite), you can enter about:config in the address bar, locate the line starting with network.dns.disableIPv6 and change the value to true. (I'm not sure if this is necessary; I do know that, by itself, it doesn't solve the problem. But, hey - it can't hurt!)
As I said, several other folks have offered variations on this procedure - and I think I've tried 'em all. This is the method that has worked reliably, for me, through the course of several complete reinstalls.
12/15/04 - My last reinstall, this didn't work - what did work was:
Not sure what changed, but there it is...
3. Edit this to: alias net-pf-10 off ipv6
Last edited by mark; December 16th, 2004 at 04:47 AM.
"....I'm a user, not a programmer...."