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  • 23 votes cast
Jan
31
asked How do IPv4 only applications work on IPv6 only hosts?
Jan
31
comment What is the motivation for DNS64?
So when an IPv6-only host receives an A reply, it doesn't try to contact the IPv4 address over IPv6 (by encapsulating it into an IPv6 packet, like 0::de:ad:be:ef:0...:0? The gateway could then change the header to IPv4 and do the NAT translation. Wouldn't that be an easy way to implement IPv6 to IPv4 connectivity?
Jan
30
asked What is the motivation for DNS64?
Dec
4
revised How to check who blocks ICMP during MTU path negotiation?
added 66 characters in body
Dec
4
answered How to check who blocks ICMP during MTU path negotiation?
Dec
4
answered MTU, DSL router and stalling TCP
Dec
4
comment /32 subnets on Ethernet via DHCP
I'll do that (guess there's a lot more more to IP addressing than what was explained in my networking class ;). I'm pretty certain about the public IP addresses though; the static /30 is not translated in any way (the webserver on the host is reachable from the internet on that address), and in our campus management system I can clearly see my "personal" public IP address. Incoming connections to port 80 are possible as well. Seems like a giant waste, but they apparently do it to comply to wiretap legislation which would otherwise force them to log all dynamic IP assignments in time.
Dec
4
comment /32 subnets on Ethernet via DHCP
At my old university, I once requested a static IP for a host, and they assigned it a /30 public address like you described. I've always wondered whether there was any more efficient way to handle that (but they don't seem to have a lack of public addresses - every electric door opener has a public IPv4 address...). At my current university, all the users get a static, public IP by default, in a /16 subnet - but I can't see any ARP requests etc. on the network. I was always wondering how the clients know where to send traffic to another host on the same subnet in that environment.
Dec
3
accepted /32 subnets on Ethernet via DHCP
Dec
3
revised /32 subnets on Ethernet via DHCP
added 505 characters in body
Dec
3
awarded  Commentator
Dec
3
comment /32 subnets on Ethernet via DHCP
I want to be able to use a firewall between all the clients on the local network and especially reduce the amount of broadcast on the segment, while still allowing traffic on certain ports.
Dec
3
comment /32 subnets on Ethernet via DHCP
The drawback would be a potential waste of IP addresses - I'm using private adresses, so in my case it's not a big deal, but how does that work with public addresses? VLANs sound like a nice idea - I'll check if my switch supports them. Would the configuration also be a /30 mask for all the hosts? If not, how do the clients know to send their packets to the gateway instead of using ARP and directly transmitting on the layer 2 interface?
Dec
2
awarded  Tumbleweed
Dec
2
comment /32 subnets on Ethernet via DHCP
Looks like the cleanest solution, but it wastes three addresses. I was hoping for a way to somehow eliminate subnets altogether.
Dec
2
asked /32 subnets on Ethernet via DHCP
Nov
27
accepted huponexit for non-login shells
Nov
26
comment huponexit for non-login shells
That doesn't seem to work - the kill doesn't seem to be sent to the child processes in the first place, since the shell isn't a login shell...
Nov
25
comment huponexit for non-login shells
I want the opposite behavior of nohup.
Nov
25
asked huponexit for non-login shells