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

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2
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0answers
36 views

Is global IP one-to-many communication practical today? [on hold]

One-to-many communication over the internet is an enabling technology for many fascinating business and research projects. In principle, IPv4 and IPv6 allow for such communication by the ...
1
vote
2answers
619 views

Should an Azure VM have an Internal IP address of 100.x.x.x not 172.x.x.x or 10.x.x.x?

I have a Windows Azure host that has an internal IP address of 100.x.x.x. I would assume that this is conflicting with external hosts with the same net mask. Is there any assurance that I will not ...
0
votes
0answers
25 views

Change Gateway doesn't work on Windows 7

This PC was configured with 192.168.6.1. But I tried to change it to 192.168.6.51. Although route print showed the default gateway is 192.168.6.51, but the packets next hop is 192.168.6.1. IPv4 Route ...
0
votes
0answers
4 views

Access IPv6 computer from IPv4-only network. Is it possible? [migrated]

I recently changed from an ADSL 10 MB to a GPON 40 MB and since then I'm having a bad headache. My old ISP (ADSL) gave me always a valid public IPv4. Sometimes it changed but there was no problem ...
0
votes
1answer
28 views

NetBios issues with multiple adapters, may not be turning on

I'm working in a Windows 2008 server. I'm getting conflicting messages as to weather or not netbios is enabled. The problem is that my AD users can't "discover" the server. I think that netbios is to ...
0
votes
0answers
99 views

What causes the Linux neighbour table confirmation counter to be reset

Given three linux hosts on the same broadcast domain, the sender constantly pings an IP bound to receiver1. When moving the IP address from receiver1 to receiver2 it takes a quite long time for the ...
10
votes
2answers
1k views

Prefer IPv4 incoming connections over IPv6

We run a social/local service that benefits from geolocating the IP of users. The problem is that with IPv6, geolocation is quite a bit spottier than with IPv4. Is there a way to prefer incoming ...
8
votes
2answers
1k views

American Users have wrong IP address geolocation

In order to display the right content for my users I get their country based on their IP address. I have been receiving several reports from American users saying that the content is being displayed ...
0
votes
0answers
41 views

ICMP replies - ingress or egress interface (e.g. from a traceroute)

When a traceroute is initiated and receives an ICMP replies from the nodes, which interface should the be replying from according to RFC 1812. they are actually replying from ingress (where they ...
0
votes
1answer
46 views

IPv6 users see different site than IPv4 users [closed]

I had a site hosted on 1and1 that I moved to an Azure VM. I found that some people who have IPv6 enabled in their routers (not sure if that's the only situation but it's the one that I came across) ...
1
vote
3answers
46 views

Arvixe claims that my physical host is located in Europe eventhough the whois information

When I look whois of the site it seems like located in US. My site is: www.evdore.com. 1 * * * 2 hos-tr1.juniper1.rz13.hetzner.de 213.239.224.1 de 0.145 ms ...
0
votes
1answer
64 views

nginx won't listen ipv6

I'm running a nginx server (1.8.0) and I want to listen both in ipv4 and ipv6. But even with the right listen statement (and a restart of nginx of course) a netstat -tlp | grep nginx return tcp ...
0
votes
1answer
37 views

netsh command to add interface

I am working with Windows 2012 R2 Core and I having problems with setting up my NICs after they got reset. When I run "netsh int show int" it shows bother Interfaces as Enabled and Connected. ...
0
votes
2answers
36 views

Cannot bind to port > 1007?

I want to bind a server to port 1023. If I specify any free port > 1007, I have a "address already in use" error, but it works for ports <= 1007. Working as root on Debian 7.8... Any idea?? ...
1
vote
1answer
60 views

Force use of IPv6 address over IPv4 address

I'm attempting to serve a website from a machine that only has an IPv6 address. I have purchased a domain name and changed the AAAA record of the DNS resource record to my IPv6 address, and have ...
1
vote
2answers
94 views

How do I send network packets from an ipv4 address (with port forwarding) to an ipv6 address (no port forwarding) without STUN?

* I have the following situation: * Bob wants to interact with Alice directly (encrypted interaction, no intermediary server who will forward his packets). Both are behind NAT. Alice has a public ...
0
votes
0answers
121 views

How do I force IPV4 with PCS? (Pacemaker/Corosync)

I'm setting up a Pacemaker/Corosync cluster with a DRBD mount for a highly available Webapp in a secure environment. This is running on CentOS 7. The cluster is working. However to get this system ...
0
votes
0answers
46 views

Direct Access with ipv4 address

I was wondering how an application would behave if it uses only ipv4 address to access an resource on corporate network with Direct Access. Lets consider the client is Windows 8 and DA server is ...
0
votes
1answer
52 views

Windows translate external IPv6 to localhost IPv4

I have a machine running Windows server 2012, whose external IPv6 address is "2a01:4f8:190:7449::4". Let's assume it has no external IPv4 address, so the v6 address is the only way of accessing it ...
4
votes
3answers
183 views

Make reachable via a fixed address (e.g. IPv6) a server that is actually connected via a variable IPv4 adress?

Need: Internet host at a fixed IP address for full-stack self-hosting People want to perform self-hosting in an area where no ISP provide sufficient service with a fixed IP address. They provide one ...
0
votes
0answers
16 views

IP Address Subnetting [duplicate]

For my computer networks class, I'm having a hard time understanding how to subnet IP into different networks. Here is a textbook question that I'm having difficulty on: Suppose an organization was ...
0
votes
1answer
41 views

IPv4 ICMP Codes/Errors for WAN transmissions

Can someone tell me which IPv4 ICMP Codes/Errors i have to unlock as Best Practise for WAN transmission (RedHat und Cisco)?
-2
votes
1answer
31 views

How can I apply a firewall rule to a specific local IP? [closed]

I host gameservers and as a result have a few IPs. On the main server IP I have the game panel, other IPs are reserved for use by the gameservers I host for my customers. As a result I would like ...
1
vote
1answer
32 views

AS number with two isolated networks

The company I work for have branches all over Europe and data centers in Sweden and Germany. In Sweden all sites are connected to each other via point-to-point links as well as each connected to ...
0
votes
2answers
75 views

IP Address reassignation (unused Ip address)

Available IPv4 address blocks are exhausted and price per IPv4 address is increasing. However I read that 2/3 of IP address remains unused because they were assigned improperly at first stages. Since ...
16
votes
3answers
1k views

How do I make actual use an IPv4 block that I own?

We (a small French company) had reserved an IPv4 /24 block (256 addresses) from RIPE-NCC, over 20 years ago, but never used it. Update: our assignment belongs to the "Provider Independent (PI) address ...
-3
votes
1answer
76 views

First Reply on Ping is Unreachable the rest is okay [closed]

please check this weird ping i'm having What may have caused this problem
0
votes
1answer
93 views

Are there cases where the value for REMOTE_ADDR will be IPv6?

Even with fairly widespread acceptance/implementation/adoption of IPv6, I have only ever seen IPv4 addresses used for the REMOTE_ADDR value. Assuming I am using the REMOTE_ADDR for things like ...
1
vote
1answer
156 views

How to disable ipv6 support in Linux entirely?

We are currently setting up a some local network servers to run in a full ipv4 network. I can be sure, that this network don't have ipv6 support, and never will. Next to that, partially because of ...
0
votes
0answers
72 views

How to set up a Linux gateway for multiple WAN networks?

I have a network with the following IPv4 and IPv6 addresses: eth0 Link encap:Ethernet Hardware Adresse 30:85:a9:42:3e:60 inet Adresse:109.2xx.239.145 Bcast:109.2xx.239.255 ...
0
votes
2answers
112 views

EC2 multiple outbound IP addresses setup

I've looked everywhere and haven't found a good solution to the following problem: I'd like to set up an ec2 instance with 2 public ip addresses, with 2 rails servers each using one IP address. They ...
-1
votes
1answer
64 views

Is there a Universal/Generic Default Gateway Address in IPv4? [closed]

Is there a universal and/or generic default gateway address in IPv4? I'm looking for something similar to the way you can always reference a NICs IP address from itself with 127.0.0.1 regardless of ...
-2
votes
5answers
266 views

What happens if ISPs mess up IP allocation?

I've been wondering about this for a long time but never really got around to asking it. I know that a lot of companies were initially assigned IP addresses within the /8 (Class A) range and a lot ...
22
votes
3answers
2k views

New service decision: IPv6 or IPv4?

While hosting new service these days, what would be best decision. IPv4 or IPv6 ? If we decided to launch it on IPv4 address: How easy/difficult to get IPv4 address (considering they getting ...
1
vote
1answer
57 views

Set inet_interfaces for each postfix service

I have a complex postfix setup with dovecot authentication, amavis and spamassassin. The inet_interfaces are set to my IPv4 address, IPv6 address and IPv4 and IPv6 loopback. But I want that the ...
25
votes
8answers
3k views

What's the maximum number of IPs a DNS A record can have?

I have a strange idea - let multiple people/organizations host the same application, and let all their nodes be accessible via a single domain name. That's in order to have, let's say, a really ...
2
votes
1answer
793 views

OpenVPN with mixed ipv4 and ipv6 clients

I have a VPN server handling various clients; some with ipv4 only, some with ipv4 and ipv6, and some that will be ipv6 only. Some of these clients are roaming, so ideally they should connect to ipv6 ...
1
vote
3answers
125 views

Is there a way to allow all external ip connections (i.e ipv6 as well as ipv4) in FreeRadius?

I need to accept all incoming connections to the FreeRadius server be it ipv6 or ipv4. I know that we can allow all ipv4 clients with: client 0.0.0.0/0 { secret = abcde shortname = xxxx } How ...
0
votes
3answers
323 views

How to forward port traffic to public IP in Win2K8

I need to forward traffic coming in to a server from a public IP over a specific port (port 7575) to another public IP address on (preferably) the same port. I am using Windows Server 2008 R2 on the ...
2
votes
1answer
410 views

Powershell - Sort-Objects, list of IP Adresses

I got a /20 network and I want to know all used IP Adresses and their attributes like the MAC, the name and the description plus all free addresses between the used ones so that I got a long list ...
6
votes
3answers
4k views

Do you need separate ipv4 and ipv6 listen directives in nginx?

I've seen various config examples for handling dual-stack ipv4 and ipv6 virtual hosts on nginx. Many suggest this pattern: listen 80; listen [::]:80 ipv6only=on; As far as I can see, this achieves ...
0
votes
1answer
120 views

How to start with IPv6 subnetting on linux gateway

We are currently having perfectly working IPv4 network with a typical layout - internal network with all servers splitted to VLANs in 10.0.0.0/8 (each vlan is /24) and external network with public ip ...
1
vote
1answer
56 views

End-to-Edge Protection on DirectAccess

Learning about DirectAccess. This is a diagram of End-to-Edge protection Once the data goes in the corporate network, it doesn't matter whether the corporate network is running on IPv4 or IPv4. ...
1
vote
1answer
77 views

How does this ipv4 network card understand this ipv6 listening server?

So, I just setup a new server on a droplet and looking at eth0 with ifconfig I can see that the network card is setup for one IPv4 address and one IPv6 address (IPv4 changed for protection): inet ...
0
votes
1answer
103 views

IPv4 Nating and IPv6 Bridging

We have only 5 usable static IPv4 IPs and many IPv6 static IPs. We want Multiple nodes/pc to be connected with Internet using nating/router because we have limited number of IPs. We would still want ...
-4
votes
1answer
79 views

Do anycast addresses imply IPv6? [closed]

From what I understand, as a random user on the Internet, you cannot really know if an IPv4 address is unicast or anycast. However if you ping that IPv4 from two hosts physically located on two ...
0
votes
0answers
41 views

Assigning Outbound ipv6 Addresses to Users via Squid-Cache Proxy?

I know that I can assign ipv4 listening ports that route to outbound ipv6 addresses for connections to ipv6 sites using Squid-Cache but the problem is there's a limit on the amount of listening ports ...
0
votes
0answers
116 views

Squid Proxy: How to link inbound IPv4 ports to outbound IPv6 Addresses

I'm using Squid and I need to accept inbound connections on an ipv4 address using an ipv4 port that each user account link to an specific outbound ipv6 address. So for example I want to open port 4000 ...
0
votes
0answers
288 views

Windows computer with static IP and 169.254 APIPA address

I have a Windows7 Pro computer being used as a server to control our IP cameras. Recently, it refuses to connect to any of the cameras, even though the cameras themselves are working. I can access ...
-2
votes
1answer
62 views

What would be the side effect if I use network address as my IP address? [closed]

I have read at multiple places that network address is a reserved IP and is not recommended to be used as an IP address for an interface. However, I do not see any immediate error or other side effect ...