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Questions tagged [ipv4]

Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form of dotted decimals between 0-255. Ex: 169.254.0.1

The IP address of a device is its unique identifier on a network which allows communication with that device.

Given the fact that only 2^32 IPs are available, number which is already depleted, its successor (IPv6) has officially taken over on 6 June 2012.

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Obtaining and routing small IPv4 space?

I had an idea for designing a network setup in order to acquire high availability connections to my (small) network, but I seem to be running into a few problems trying to find out the particulars. The Quest I want to be able to have, in a location…
Michael Trausch
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Multiple next-hops for a destination

I want to add a primary next-hop for a destination and then a secondary next-hope for the same destination, in case the first one fails. How can i do that? i couldn't find a straight answer on the Internet. Thanks, Alex
Stanciu Alexandru-Marian
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Change port from ipv6 address to ipv4 address

I have setup a service on my server which has opened a port (ie, 40000) but its foreign address is :::* which is a wildcard ipv6 address (I think) When I run telnet localhost 40000 on the server the connection is working fine, but when I try to…
user76264
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Return packets via squid running as tproxy not working

I have been trying to get this to work properly for two days now and I desperately need assistance. I have configured Squid 3 as a proxy listening on port 3129 with the tproxy flag, and followed the instructions for shorewall found…
Geoffrey
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How can hotspots support more people than the number of IP's allowed in a typical IPv4 IP Range?

What happens when there are 259 people active on a network? Will the hotspots just move to another local IP range? My original thought was it would just start kicking people off, but I see hotspots used in schooling environments all the time where…
Hunter Dolan
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netsh add IPs Batch Script

I am trying to add a large block of IP addresses to our NIC in Server 2008 R2. For some reason this isn't working from the command line or from a batch file though. FOR /L %A IN (131,1,190) DO netsh interface ipv4 add address "Local Area Connection"…
Aidan Knight
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4in6 tunneling software for Windows

I have a VM running Windows 2008 R2, and I need this VM to connect to a remote site using VPN. The VPN software does not support Windows 2008 R2 or any other 64 bit operating system, so I can't install it on my VM. But then I have another VM running…
Nils Magne Lunde
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Win7: How to solve: Unidentified network/No Internet connection problem?

It's been a few days now that I have gotten problems and problems with my network connection, though my other computer works fine! The problematic computer is operating with (PC2) Windows 7 Professional The running-fine computer is running…
Will Marcouiller
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Teredo and IPV6 web servers

I have two different questions, the first one could be stupid. I was reading about IPV6 and ended up in this site http://test-ipv6.com/ that says that I have a public IPV6 with Teredo tunneling. I don't understand if this Teredo is a software…
Sandro Antonucci
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enabling ipv4 forwarding locked up machine. ideas?

Hey. I'm running cent 5.5 64-bit, 1 nic, eth0. I enabled ipv4 forwarding via: echo '1' > /proc/sys/net/ipv4/ip_forward and the machine locks up. cant switch ttys cant ssh into it. Had to hard reboot. Any ideas? I did this on a similar box a week…
Flamewires
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postgres - sharing same pg_hba.conf between IPV4 system and IPV6 system

I am trying to package postgres from one machine to another. The source is windows 7 with IP V6 and target is windows XP with IPv4. Starting postgres on windows XP gives error 2010-11-01 12:01:07 IST LOG: invalid IP address "::1": Unknown…
Jayan
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How to assign two IP addresses (one DHCP, one static) to a NIC in OpenSolaris?

This should be mind-numbingly simple and basic, and yet I couldn't find how to do it, either in "man ifconfig", in the OpenSolaris docs site, or Googling in desperation. I'm using OpenSolaris 2009.06. When I try ifconfig e1000g0:0 10.10.10.1 netmask…
JCCyC
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Access subnet from another subnet

I have ipv4 address 192.168.88.130 assigned by DHCP (cannot use static IP). I have to access devices on 192.168.20.X by changing adapter settings to static and assigning some IP from 192.168.20.X, and then i can access any of devices there. Is there…
gmijo47
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Setting up Ubuntu vm and forgot to add a search domain

I was setting up an Ubuntu DNS server VM and accidentally forgot to add a search domain. How can I add this to my system? I set a static IP and had DHCP turned off on the machine. I am also using NetworkManager, would I add this configuration to my…
frictionless
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Use nftables to set up IPv6 NAT to IPv4

I am working on setting up a number of EC2 instances with IPv6-only networking. A few of these servers require occasional access to IPv4-only resources controlled by third-parties. Amazon has a blog post from February 2022 about using NAT Gateway…
Moshe Katz
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