Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form: 192.0.2.235
34
votes
8answers
3k views
Why do ISPs change your IP address?
Is there any specific reason an ISP will need to change your IP address? What is the purpose of a dynamic IP versus a static IP? For me it seems to happen every 6 months, while for someone I know, it ...
14
votes
7answers
12k views
Is there any benefit to using IPv6 on my home network?
I know that IPv6 is the future because there is only 4 billion IPv4 address, but on a home network, you are not going to have 4 billion users. So are there any other benefits that would make IPv6 on a ...
12
votes
2answers
1k views
What about IPv4 class E?
IPv4's class E network (240.0.0.0/4) contains 268 million addresses. Despite the advertisements for IPv6, claiming we have ran out of address space, this block ironically still claims to be "Reserved ...
9
votes
4answers
285 views
How to put two subnets next to each other?
I've been using this calculator http://www.subnet-calculator.com/cidr.php, and I'm trying to figure out how to put two different subnets next to each other.
For example, I want to have a /27 subnet ...
9
votes
5answers
2k views
Does NAT provide security?
I'm following discussions about the IPv4->IPv6 transition, and IPv6 doesn't seem to like NAT at all.
I've always thought that NAT was helpful in v4 for some security, I know it doesn't really hide ...
9
votes
2answers
5k views
How can I setup an IPv6 network in this way?
I have a network mapped like this :
To experiment with IPv6 connectivity, I want to configure my LAN network using IPv6.
Can someone explain how to convert the connection between the Desktop and ...
8
votes
9answers
1k views
Tracking my home IP from anywhere on the internet?
I have an ISP that serves semi-permanent IPv4 addresses. They can't promise fixed IP addresses, but unexpected changes are quite rare.
This begs me to ask however: what would be the easiest/most ...
7
votes
3answers
1k views
Does disabling IPv6 decrease my surface area of attack and increase performance?
I have colleague that is on this whole kick of disabling IPv6 while leaving IPv4 on each new machine that comes in before deploying in our environment. He takes his personal anecdotal evidence and ...
6
votes
1answer
649 views
Is there any reason to subnet a home network?
For networks I understand we set a netmask on each computer to let it know what IPs it can talk to without going through the router - IPs on the same subnet can talk directly to each other and do not ...
6
votes
2answers
3k views
How do client applications know to use IPv4 or IPv6?
How do servers/computers/users/applications know to request a resource over the Internet with an IPv6 address vs. and IPv4 address?
5
votes
3answers
774 views
What happens when all IP addresses run out?
I recently read an article in which they wrote that that there will be a time when there will be no more IP addresses available. Is that right? Do I need to register a website now just in case?
5
votes
4answers
23k views
Why do I get “General Failure” when pinging host name on a Win 7 node on the network?
This is a very peculiar problem with a station on our network. The client pc is running Windows 7 Pro. What makes this problem interesting is that this client is the only node on the network that ...
5
votes
4answers
3k views
Is it possible to use IPv6 in LAN with router only supporting IPv4?
My router (Belkin N1 Vision) seem to only support IPv4. The problem is that i'm trying to get Windows 7 Homegroup going and it requires IPv6. I'm trying to connect home computer which is connected to ...
5
votes
3answers
352 views
4in6 tunneling (via OpenVPN?)
I have a local network with internet access. But unfortunately IPv4 internet connection speed is limited to 1mbps, which is realy sad. Fortunately I have a native IPv6, and there is no connection ...
4
votes
3answers
738 views
How to get started with TCP/IP v6?
Now and then there is "news" about that the IP numbers will run out in X years,
and we must change to TCP/IP v6...
And even though this crisis never really happens it has waken a question,
how do ...
4
votes
1answer
2k views
IPv6 Tunnel via Own Linux (IPv6-connected) Server
Unfortunately, there's a lot of IPv6 tunnel brokers, and their documentation often clutters the search results for how to setup your own IPv6 tunnel.
I have a Linux server with IPv6 connectivity. I ...
4
votes
2answers
5k views
4
votes
1answer
690 views
IPv4, IPv6 and IPTables
I have just recently learned that even if I block all traffic to my webserver using iptables it is still vulnerable to external attacks via IPv6. In my understanding, this renders iptables-only ...
4
votes
1answer
40 views
Get IPv6 address of an IPv4 machine?
Given two machines on a local network, both connected via IPv4 and IPv6, can machine A get the IPv6 of machine B if it has machine B's IPv4 address?
I presume the ARP cache should be able to provide ...
4
votes
1answer
111 views
Is there a way to test alternate IPv4 routes?
i am using Hurricane Electric's Tunnel Broker service to get IPv6 connectivity.
TunnelBroker lets you have access to the IPv6 Internet by using a standard IPv6 tunneling protocol. You send IPv6 ...
3
votes
4answers
673 views
How do I properly access Google through IPV6?
I'm trying to access Google through IPv6. However, it seems to want to send me back to IPv4! I did a DNS lookup on IPv6.google.com at http://centralops.net/co/ and found their IP, then tried this...
...
3
votes
1answer
80 views
From where does IP geographical location data come?
I don't understand how some sites (e.g. https://www.ultratools.com/tools/geoIpResult)
show country and town for an IP address. For example 193.45.10.135:
Continent: Europe
Country: Germany
Country ...
3
votes
2answers
1k views
Should I get a router with ipv6 support?
I'm in the process of getting a new gigabit router so I can transfer files faster to and from my Lacie Network Space. I found Asus RT-N56U Wireless N Dual Band Gigabit Router. Its performance is ...
3
votes
1answer
151 views
Can I prioritize IPv6 traffic over IPv4 traffic on Linux?
Is there a way I can give traffic over IPv6 a higher priority than traffic over IPv4?
Purpose is 2-fold: Promote IPv6, and be able to connect even when my server is swamped by IPv4 users.
2
votes
2answers
330 views
How does CIDR slow the exhaustion of IPv4?
In the Wikipedia article on CIDR, it says
The Internet Engineering Task Force introduced CIDR in 1993 to replace
the previous addressing architecture of classful network design in the
...
2
votes
3answers
414 views
Why were the ipv4 private address ranges chosen to be what they are? [duplicate]
Possible Duplicate:
Why are home networks prefixed with 192.168?
What makes the numbers 192.168 or 10. or 172.16 so special that those addresses, as opposed to other ones, were chosen as ...
2
votes
2answers
79 views
Wireless Internet is “Unidentified”?
My laptop wireless refuses to connect with my wireless adapter. It says signals all good and ip address is cool, but my ipv4 ad ipv6 connectivity is "no netwok access". What do i do with that?
2
votes
1answer
5k views
How to force java to use ipv4 instead ipv6?
java in my browser no longer working, when I open a page that has a java element, java can not connect to the server, after I investigate it, obviously java was trying to use ipv6 java, while my ...
2
votes
3answers
2k views
SSH tunnel in Ubuntu
How do I create a ssh tunnel in Ubuntu that is persistent? I have tried a lot of ways but I haven't gotten it to work.
2
votes
1answer
279 views
Windows IP conflict after setting Static IP
I am having troubles setting my static IP address.
I double check all of my default settings and tried to make my IP static. Here is what I entered
I have tried various different IP addres ...
2
votes
1answer
343 views
Using router public IP to access another (located in WAN) router behind NAT
I have following setup:
at home I have a router up and running with public ipv4 ip
at my country house I have ipv4 cam and router which is behind NAT - no public ip (public ip is too expensive)
both ...
2
votes
1answer
938 views
Change permission to /proc/net/ip_conntrack on Ubuntu server 9.10
I have a script that needs to extract certain information form the /proc/net/ip_conntrack file once in a while. I do not wish to run this script as the root user.
Default permissions for the file ...
2
votes
0answers
89 views
How to block a program from using IPv4?
i have a program that can communicate over IPv4 (TCP and UDP) and over IPv6 (TCP and UDP). i want to block the program from being able to use IPv4.
i tried the Windows Firewall:
Except it blocks ...
2
votes
1answer
210 views
Prefer IPv6 over IPv4 in Windows Server 2003
I am running Windows server 2003 and my Firefox browser keeps using IPv4 instead of IPv6. Well at least http://ipv6-test.com/ says that my browser uses IPv4. How can I force it to prefer IPv6 over ...
1
vote
4answers
208 views
How common is fancy IP math accepted by tools?
If we specify an IPv4 address we all usually do the pattern of 1.2.3.4
Now essentially this is only 'a' way of writing a 32 bit number in a more human readable form.
The IP address 1.2.3.4 can also ...
1
vote
2answers
366 views
Should I get a gigabit router with or without ipv6 support? [closed]
I'm in the process of getting a gigabit router so i can transfer files faster to and from my Lacie Network Space. I found a gigabit Router. Its performance is really good, however it doesnt support ...
1
vote
2answers
148 views
How to find the network address of a given subnet?
How do I find the x th subnet of X.X.X.X /XX (300 th subnet of 172.16.0.0 /29)?
1
vote
3answers
694 views
IPv4 forward on windows?
Is there anything that can forward/redirect all incoming traffic to another ip. Basically I'm looking the windows equivalent of ip forwarding in linux.
echo "1" > /proc/sys/net/ipv4/ip_foward
1
vote
2answers
1k views
Install Internet Protocol Version 4 (TCP/IPv4) on Windows 7
I can not explain what has happened, just suddenly I lost my internet connection. On local area connection properties IPv4 is not installed, my ISP says that they only support IPv4. Then I must had it ...
1
vote
3answers
780 views
Should I use a static IP address? If so what kind?
Last night I managed to get my local PC running as a server using port 80 and my IP address.
After restarting my machine it stopped working.
I was told I need to make a static IP address. My ...
1
vote
1answer
160 views
What are the equivalent IPV6 versions of IPV4 special-use adresses?
I'm trying to make a private network with 5 computers bellow an external ADSL router with NAT, but internally I want to use IPV6. To do this I need to use private special-use IPV6 addresses, such as ...
1
vote
2answers
336 views
1
vote
1answer
330 views
6to4 vs ISATAP vs Teredo Adapters
I understand that all three adapters mentioned in the title are related to transitioning IPv4 to IPv6.
ISATAP: Transmits IPv6 packets between dual-stack nodes on top of an IPv4 network.
Teredo: IPv6 ...
1
vote
1answer
89 views
IP Routes - Route Mapping
I've been reading up on static routes and such while studying for my next MS exam, and am wondering - in CMD, if you do a route print -4 you get a Active Route Output such like this:
Destination ...
1
vote
2answers
5k views
How can I make localhost resolve to 127.0.0.1 instead of ::1?
When I ping localhost the address resolves to the ipv6 loopback of ::1
My MySQL and Apache installations expects the ipv4 address of 127.0.0.1
How can I configure my WindowsXP to resolve localhost ...
1
vote
4answers
4k views
Ping myself, works with ipv6 not ipv4 in Windows 7
I've tried to solve the following problem with no luck and I need some proffesional help.
The following is possible:
Ping all computers (that I tried) in the domain without problem.
Ping myself ...
1
vote
1answer
266 views
IP, Gateway and DNS changer [.bat Win7]
I have a batch file that I use on my WinXP SP3 (I found it on the net and it worked).
SWiTCH TO CONNECTION 1
@ECHO OFF set varip=192.168.0.118 set varsm=255.255.255.0 set
vargw=192.168.0.1 set ...
1
vote
1answer
1k views
Windows 7 ipv4 autoconfiguration - cannot connect to internet
I get my internet connection from a guy (lets call him my service provider henceforth). He gives internet connections to many students here in my hostel. My PC gets a private IP through his DHCP ...
1
vote
0answers
33 views
IPv4 Considerations for a Cloud-based future [closed]
I'm re-doing a small company's IP scheme / netdesign for their LAN.
They are growing fast, with many branch offices opening soon.
It's a mostly flat 192.168.1.x/24-ish out-of-the-box network.
There ...
1
vote
1answer
282 views
strange characters in DNS Suffix
I have some strange characters in my DNS Suffix. I have removed these strings from registry and attempted to fix this in many other ways. Does anyone here have an idea of what I could do to fix this.
...
