Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form: 192.0.2.235

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2
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1answer
29 views

Is ping's handling of incomplete IPv4 addresses standard? [duplicate]

I accidentally hit return too early when attempting to ping a device, so instead of ping 10.111.12.4 I typed C:\Users\roadierich>ping 10.111 Pinging 10.0.0.111 with 32 bytes of data: Request ...
1
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2answers
61 views

Practical (not theoretical) Subnetting 192.168.0.0/25

The Situation I have a Netgear WGR614v7 router (wireless disabled). Hosts in both subnets should have internet access but should not be able to ping hosts across the subnets. I want to split my ...
1
vote
2answers
39 views

IP address rules for each octet

This Wikipedia article on IPv4 addresses states the valid range for each octet is 0-255. However, when I enter a number that is deliberately out-of-range on my Windows 7 PC, the valid range is ...
0
votes
0answers
49 views

10.0.0.1 is non-routable IP v4 address but it is routable over the Internet

Strange but this is happening to me I have checked on multiple machines but on the same network. IP v4 address - 10.0.0.1 is routable! see attached screenshot and suggest why this is happening. since ...
-1
votes
0answers
27 views

How to setup private network in addition to local area connection?

I want to install Active Directory Domain Services on Windows Server 2008 R2. I found this nice tutorial here. The problem is that in the first step, it says to change/configure the IP address of ...
0
votes
0answers
38 views

cPanel doesn't recognize IPv6 address in MySQLRemote [migrated]

I need to input my IP on cPanel's MySQLRemote list of authorized addresses, and it says is invalid. When I go to http://whatismyipaddress.com/ or run ipconfig, it shows my IP address is as below: ...
0
votes
0answers
15 views

VPN Connection: Draytek Vigor 2820 Cannot Initiate IPSEC Tunnel

I have been asked to setup a site-to-site IPSEC VPN Tunnel from a Vigor 2820 (at the client's premises) to a Cisco ASA 5505 (hosted at Rackspace). I have input all of the details that Rackspace had ...
1
vote
0answers
70 views

How does AWS convert an IPv6 address to an IPv4 address when whitelisting “My IP” address

I recently had to whitelist my IP address in an AWS security group using the "My IP" option. It worked perfectly and displayed an IPv4 address, but when I looked up my IP address with Google I got an ...
0
votes
4answers
1k views

Can we use IPv6 addresses only?

I am trying to do a project about IPv6. My first query is, can we completely disable our IPv4 address and use only our IPv6 address? My second query is, how can an IPv6-only host communicate with an ...
4
votes
2answers
1k 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 ...
2
votes
1answer
1k views

Why is my computer suddenly using NBNS instead of DNS?

I have a Windows 7 laptop which I regularly use to access wireless internet when traveling. Normally, everything connects and functions as expected, but as of 4 days ago, I have noticed that I am ...
4
votes
2answers
12k views

Doubt In default time to live (TTL) 255?

I know that,The Default Time to live value is 255, each time a ipv4 packet crosses a router that value is decremented by 1. But,When I ping my adsl router it shows TTL as 64 Pinging 192.168.0.1 ...
0
votes
0answers
46 views

no internet connection windows server 2012 setting up remote desktop connection

I'd like to setup my Windows 2012 Server so I can Remote Desktop Connection from my client (Windows 10) with the static IP that I'm going to give to the server. (So not through a site). After having ...
0
votes
0answers
48 views

Ping: General Failure

I am facing a weird issue on my laptop that only Internet Explorer can access internet no other application, not even chrome, iTunes. When I try to ping any website I get an error. When I ...
5
votes
2answers
15k views

Blocked by Group Policy: trying to install TCP/IPv4 (Windows 10)

So I uninstalled Winsock and Winsock2 registry keys and now cannot connect to the internet. I am using the following walkthrough to try and reinstall Internet Protocol Version 4 (TCP/IPv4) but every ...
0
votes
1answer
1k views

What other protocols can run over the Link Layer besides IP protocol?

I am reading about ARP here and it says "Each protocol is assigned a number used in this field. IPv4 is 2048 (0x0800 in Hexa)." What are other alternatives to IPv4 and IPv6 as protocols to be run ...
0
votes
0answers
35 views

TTL in ping reply set to 128

I'm using the ping command to ping google.com, and can't understand why am I getting TTL of 128 in the response. ping www.google.com PING www.google.com (172.217.19.196) 56(84) bytes of data. 64 ...
3
votes
1answer
107 views

Translating IPv6 packets to IPv4 packets to reach a game server

I am behind a DS-Lite system and therefore have no native IPv4 address. But out of curiosity, I want to find out, if it is possible to set up a game server behind that. More precise, a counter-strike ...
0
votes
1answer
27 views

Listen to localhost messages

Suppose a TCP/IP client application has connected to a certain port on a server. Both client and server are operating on localhost. Is it possible for another application (also on localhost) to ...
0
votes
0answers
11 views

GNU/Linux ping: Disable timestamps

I'm using ping utility, iputils-sss20101006. The -s 100 option causes the ICMPv4 packet to have an 8-byte timestamp and 92 bytes of random data. Therefore all Echo and Echo Reply packets include an ...
6
votes
1answer
49k views

Optimal setting for advanced parameters for Realtek PCI-e GBE family network card

superusers. I am trying to get the best possible setting for my Realtek PCI-e GBE family controller network card so that when it will be literally minimal or zero lag when playing online game. ...
1
vote
2answers
70 views

Would NAT be eliminated transformed in ipv6?

NAT is a wonderful concept used in ipv4. It is the major reason for the existence on internet, in my concerns. There are no networks in the world that doesn't work without employing NAT. All I seek ...
0
votes
1answer
59 views

multiple static IP address

I am trying to setup 2 external static IP address through a Arris Modem/router bridged to 2 router so I could split pc network and server network. How would I go about setting it up properly/ if it is ...
0
votes
2answers
141 views

Unable to connect to one particular FTP server

I am unable to connect to a particular FTP server at Fasthosts over my usual ISP connection, using any of Filezilla, Notepad++ or WinSCP FTP clients on either my PC or my laptop. However, I CAN ...
0
votes
0answers
24 views

PPTP VPN issue, multiple platforms

Using PPTP VPN for multiple clients, I've seen an interesting issue on Mac OSX El Capitan, and Windows 7 and 8. For clients connecting from home using a subnet that is identical to the internal subnet ...
1
vote
2answers
93 views

How to connect two locally linked computers to WIFI using IPv4 addressing?

I want to connect my laptop and another computer (which is RaspberryPi 2, but that's not very important) using a crossover cable. Then I would like to SSH from my laptop to another computer. Finally, ...
0
votes
1answer
39 views

My IPv4 Address automatically changes

I have Windows 8.1, For some reasons I need forward ports for my computer. (you may know that computer's IPv4 Address is necessary for it). But my computer's IPv4 address automatically changes after ...
0
votes
1answer
470 views

Any way to create OpenSSL certificate request that would be valid for two IP addresses?

I have a private app running as a webserver on a machine on an isolated wifi router using 192.168.1.*/255.255.255.0, with no DNS capability & no upstream Internet; basically, only local wireless. ...
1
vote
5answers
3k views

Dynamic DNS for both IPv4 and IPv6 (using freedns.afraid.org or others)

[Edit: I have now found a solution; see below for my answer] I want to set up dynamic DNS on my Fritz!Box 7490, so that it is reachable both on IPv4 and IPv6. Note that I want to reach the Fritz!Box ...
0
votes
2answers
53 views

Identify the TCP/IP classes respectively by beginning octets

I am busy studying for a network exam and I am stuck with this zinger: By studying the following beginning octets, identify the TCP/IP classes respectively 1-126 224-239 240-254 ...
0
votes
1answer
143 views

IP Datagram Fragmentation total length and payload calculations

I do not understand how to fragment a IP datagram. Let's say the original datagram has a total size of 302 (20bytes header and 282 bytes payload). My datagram needs to be fragmented since it goes ...
6
votes
1answer
931 views

Exactly how many valid IPv4 addresses are there?

Seemingly simple question, with enough edge and corner cases that I don't trust my ability to calculate it. What is the exact number of valid IPv4 addresses that could potentially be used as ...
0
votes
0answers
73 views

IPv4 or IPv6 for local DNS server?

I am a bit inexperiencied with networks. I have set up and dns server in a virtual machine on Debian 8 using dnsmasq. To test if it was working, I gave it only one record: www.facebook.com with ...
3
votes
1answer
88 views

IPv4 connectivity to IPv6-only host

I have a IPv6-only host (let's name it S) in my home network which is accessible from outside by its IPv6 address. Since my ISP doesn't provide any IPv4 connectivity, it cannot be accessible from IPv4 ...
1
vote
2answers
56 views

IPv4 changes by itself

My IPv4 address randomly changes by itself but I can't figure out why ? It changes from 192.168.0.10 to 192.168.0.13 and vice versa. That happens doesn't happen often but very randomly... Does ...
21
votes
10answers
192k 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 ...
19
votes
2answers
3k views

Can a domain name have both IP addresses (IPv6 and IPv4)?

Can a domain name (example.com) have both the IP addresses, IPv6 and IPv4? Which IP address does a domain name have? IPv6 or IPv4? But I am not sure that it has both or any one at a time.
0
votes
2answers
639 views

long delay during ssh login

When I connect to my Debian server via ssh, the ssh client tries to establish a IPv6 connection. This fails after a long timeout (~30sec), then falls back to IPv4, which then succeeds, and I'm ...
1
vote
2answers
3k views

How do I set a static IP address in Windows?

If I do not have access to the router / DHCP server to create a static reservation (i.e. asking the router / DHCP server to set aside a specific IP address when a certain MAC address requests it), how ...
1
vote
2answers
189 views

Can two different services on the same machine use the same port on IPv4 and IPv6?

Say I have two TCP services A and B. A is an IPv4-only service listening on 127.0.0.1:10000. B is an IPv6-only service listening on ::1:10000. Can I start these services on the same machine? That is, ...
1
vote
2answers
245 views

NAT in local IPv4 to extern IPv6

I have a cable router with an outgoing IPv6 address. In my lan I have IPv4 addresses. I want to access to my local server from internet. I am not familiar with IPv6, is there something like NAT? ...
25
votes
4answers
4k views

Why does the “Internet of Things” enforce the need for IPv6 addresses?

If you have multiple devices in one network, the amount of IPv4 addresses will not increase linearly to accomodate the number of devices. There is just one IPv4 address per Network/Router that is ...
0
votes
1answer
465 views

PC sends repeated ARP requests to Default Gateway

CONTEXT: My machine, for whatever reason, is flooding the network with ARP requests. A downstream switch sees this as malicious and cuts my connection. I've narrowed it down to one of the dozen or ...
4
votes
2answers
527 views

Accessing an IPv6 server with an IPv4 address?

I have a server (Mac OS X 10.11) machine at home which exposes various services via web interfaces. I would like to access these from outside my own network. My ISP does not provide IPv4 addresses and ...
1
vote
1answer
357 views

Network Interface starts without IPV4

When I boot some RHEL 6.5 server, the NIC shows an IPV6 address but no IPV4 on ifconfig However, if I ifdown + ifup it, it gets its IPV4 address (via DHCP). For clarity, is is enabled on boot via ...
50
votes
7answers
78k 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 ...
2
votes
1answer
297 views

Shortcut to change IPv4 properties

I am looking for simple ways to change IPv4 properties of one of my networks and actually I can't find anything promising, just something about netsh. But I think there should be way to create a .bat ...
0
votes
0answers
343 views

Assign static IPv4 to specific MAC address

I am trying to assign same IPv4 to few devices every time they connect to wi-fi AP. I use Zyxel NWA3560-N. I think that there should be option to set static IP on every device and block assigning ...
1
vote
2answers
79 views

I'm trying to open query.yahooapis.com but curl is trying to use IPV6 even if I only have IPV4 enabled

When I try to call query.yahooapis.com with curl it's trying to use the ipv6 address but IPV6 is disabled on my computer $ curl -v 'http://query.yahooapis.com/' * Hostname was NOT found in DNS cache ...
1
vote
1answer
162 views

How can my personal ISP connection return two public IP addresses?

I want to play a game (Wildstar) but each time I login, it gives me an “invalid login token” error. After looking into the issue, I found that it was caused by, according to Wildstar: WHAT DOES IT ...