Carlos E. R. wrote:
On 2016-05-26 14:26, Per Jessen wrote:
Carlos E. R. wrote:
But a rogue web server would know the address and run an attack on it. Also, we can find the IP on mails.
What is a "rogue webserver" ?
A web server belonging to "bad guys", or hacked by them, that runs code using the found IPs to attack them.
Ah I see. Well, same answer as before, IPv6 privacy extensions.
As for finding addresses in mails, they are typically random. By default in openSUSE. See "IPv6 privacy extensions".
But if you want to make use of things like VoIP you would need a fixed address, non private, because you do want to do things needing being accessible.
No, you don't need a fixed address for a VoIP client. With ISDN being phased out by the end of next year, Swisscom will be switching everyone to VoIP. None of those will need a fixed IP, v4 or v6. Deutsche Telekom will be doing the same by the end of 2018. Only if you want to run a server will you need fixed addresses, just like now.
You get both type of addresses for a computer? How know applications which one to use?
/proc/sys/net/ipv6/conf/eth0/use_tempaddr 0 = privacy extensions disabled. 1 = privacy extensions enabled, but not preferred. 2 = privacy extensions enabled, preferred. A network interface will have a) link local address - fe80:<mac-addr based> b) a temporary address (assuming tempaddr!=0) = 2001:db8::random c) an address handed out by dhcp = your:pref::pooladdr d) a fixed address based on mac-addr = your:pref::macaddr-based. -- Per Jessen, Zürich (23.4°C) http://www.hostsuisse.com/ - virtual servers, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org