Questions tagged [ipv4]

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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52 views

Since activation of IPv6 on Win7, VPN routing fails + wired link DHCPv4 fails

I have an ISP box connected to a Netgear WiFi router. Internet <-->[WAN] ISP box [LAN]<-->[WAN] Netgear router [LAN]<-------> Win7 laptop 192.168.0.x/24 ...
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How do I change the public IPv4 and IPv6 adresses via CMD?

How do I change the IPv4 and IPv6 addresses via CMD? I saw all other articles, but they seem to change both the private and public IP addresses.
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Hosts file can be acessed by other devices in mobile hotspot - But not in hosted network

Warning in advance: Please don't say anything about security issues and what not, this is a private little project I'm having fun with and it's supposed to be offline and I'm just trying to get it to ...
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Can someone help me portforward?

Like others, I seek to port forward a Minecraft server. I do not know what I am doing wrong, every time I try to set up an IPv4 portforward, it never works out. Whenever I input: I get: For ...
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Update the DNS address for all PCs in a specific domain

I'd like to make a script that updates the DNS address on all our windows 10 PCs but only for the NIC that is connected to a specific domain. The problem is that our PCs have multiple NICs connected ...
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IPv4 settings in Fritz!box and clients for private VPN

I'd like to set up a VPN from an android device and from a Windows laptop to my router (Fritbox 7490) and need help to figure out which "IPv4 address" I have enter in the respective fields while doing ...
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Why isn't grep agreeing with other regex tools?

I am currently trying to write a grep command to find IP addresses in its input. My regex is \d+\.\d+\.\d+\.\d+ which works as expected in an online tester with all flavors of regex. Yet, when I ...
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Finding the default subnet mask, the network address, and the broadcast address of a Class D IPv4

In the address 225.97.13.7 (Class D) how would I go about finding the default subnet mask, the network address, and the broadcast address, known that it's in IPv4? Would it even be possible to do so?...
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No access to some web sites due to timeout

0 I have the problem, that from one day to another, I cannot reach some web sites on my Lubuntu machine, e.g. wikipedia and youtube are reachable, but amazon and stackoverflow are not. There were no ...
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IP Addresses on a DNS server system

Which of the following IPv4 addresses could be set on a DNS server system? 127.0.0.1 193.231.20.1 192.168.2.2 255.255.255.0 What am I thinking is that the first ip address is the "loopback address" ...
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How are the Length and the Pointer fields in the Record Route option filled?

I have problem understanding two things from RFC791: First, could the base-10 value of the length be greater than 40? (header without options is 20 bytes and HLEN is 15 at max)? What does "length-3" ...
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How to force the usage of IPv4?

I need to check timings on my Ubuntu machine by ping www.xyz.com but using IPv4 only. How can I check if I have both (IPv4 and IPv6) connectivity? How can I force usage of IPv4 for this particular ...
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Can't ping IPv4 through Wireless Access Point repeater (while pinging IPv6 works)

I have this setup and problem: MAIN ROUTER | ----------> | Second router (acts as an access point repeater/extender) Can ping IPv4 - | ............... | Can't ping IPv4 Can ping IPv6 - | .............
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Why does having an iPv6-only contract with my ISP could affect online gaming?

What is the reason some Online Games nay not work properly when one's ISP provide IPv6 only? Some ISPs offer IPv4 at an extra cost. Are there alternatives to this to solve the gaming related problems,...
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How to access internet which requires manual IPv4 settings and LDAP-username-password login during Arch Linux installation?

I am on an university-network that requires me to manually set IPv4 settings and then open an url on the browser to login with LDAP username and password to access internet. I can connect to the ...
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1answer
598 views

SOCAT IPv4 to IPv6 Routing

i got a small issue/question by using SOCAT on my vServer. My Problem is that i just got CG-NAT DS-Lite ISP wich provides me a private IPv4 Internal ISP IP and an native public IPv6 Adress. That means ...
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MacOS route table incomplete IP addresses and masks

If you run netstat -rn on a Mac (I'm using Mojave 10.14.6 but I suspect this applies to all MacOSs), you get the IP route table, but some of the IP addresses are incomplete, and the netmask column is ...
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Ipv4 is not in private range ip when i connect to a vpn?

As far as i understand when you connect to a vpn server it should give you private ip (192.168.0.0 - 192.168.255.255 or 172.16.0.0 - 172.31.255.255 or 10.0.0.0 - 10.255.255.255) but when i connected ...
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I'm new to networks and need help deciphering this packet: [Expert Info (Chat/Sequence): POST /version HTTP/1.1\r\n]

The source and destination is both 127.0.0.1 and the protocol is http. If I am not mistaken, the loopback IP destination (127.0.0.1) or any variant of this within a range could be used by malware to ...
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How to disable DHCP or put manually IP's without lose Internet connection

I have a problem with the router ASUS DSL-N16. Actually I want to pre-assign and IP to each device I have using the MAC of each device, no problem with this step. Now I put the IPv4, DNS and submask ...
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IPV6 Record Vs. IPV4 DNS Record

I have been configuring my web application recently, and it came time to configure my DNS. I created an AAAA record over an A record, but only because I block SSH over IPv4. Is there any advantages ...
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Mac can’t get IPv4 address but can get IPv6

I’ve been struggling for two days now. My 2015 MacBook Pro with Catalina can connect to the Xfinity router by either WiFi or Ethernet. Both of them can obtain IPv6 address and thus access IPv6 ...
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Business Class Internet issues

I recently moved from residential internet, to business internet via Comcast. As I intend to house a website out of my home and need static ip's. But I also do home stuff as well. ISP Support will ...
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Why can I ping 10.0.0.0/8 addresses from a 192.168.1.0/24 subnet?

My home network uses a 192.168.1.0/24 subnet, and when I ping 192.168.1.137 I get a response saying the host is unavailable (as expected because I don't have any machines using that address) However, ...
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Can't ping anything on local network - general failure

When trying to ping another device within the local network (in same domain) it gives: General Failure. Sent = 4, Received = 0, Lost = 4 (100% loss). Huawei Matebook X Pro with latest version of ...
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The dns-sd -B command leads to unreachable devices with IPv4 disabled

I am using Bonjour service in Windows to find my devices. The Windows command line is to browse services using the following command: dns-sd -B I am facing an issue with the value of Interface ...
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How to computers download files from the internet without port forwarding being set in the router?

Because of NAT, we know that a computer in public network cannot access a computer inside a local area network (LAN) without setting port forwarding in the router. So, how does a computer inside a ...
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Windows 10 shows Ipv4 Adress as 192.168… while internet ip lookup shows difrent ipv4

My issue is that Windows is indicating my PC is being assigned a local intranet IPv4 address while WhatsMyIP shows another IPv4 address and even a wrong location. I know my windows is remotely ...
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What does it mean to have a subnet mask /32?

I see in this question, the routing table has: 192.168.1.1/32 link#4 UCS 2 0 en0 openwrt.lan 46:94:fc:63:fc:7 UHLWIir 11 3610 en0 1200 ...
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Can't ping ipv4 address between mac and windows using hamachi

I can ping hamachi's ipv4 address for a macbook air, yet the macbook air cannot ping me back using my hamachi ipv4 address. Yet the mac can ping me by my hamachi ipv6 address. I don't a lot of ...
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is x.x.0.x/24 a valid network ip address?

I just began learning networking and in a youtube tutorial there is a problem and the answer is not free. So there are these networks: network A: ip: 172.16.0.0/24 devices: one with an ip of 172.16....
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How can a DNS server change user's IP?

For example User A's WAN IP is 2.2.2.2, When the user sets up this particular DNS server in his router or inside his operating system's IPv4 settings, his WAN IP will change to something else for ...
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299 views

Difference between Network interface vs link

(*) Sorry if this question seems to be trivial for some people. I'm not sure I understand the term link and its relation to network interface (physical/virtual). As far as I understand, link is the ...
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ipv4 and TCP/UDP ports: Multiple instances of the same program, same port number

I am trying to learn about ipv4, TCP and UDP protocols. I have read that the purpose of a port number being assigned in a TCP or UDP datagram is to ensure that the sending/receiving machines forward ...
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IP intercom across two networks

I need my 2N IP intercom to ring phones across two different networks. NetworkA is 10.1.10.x and has a switch NetworkB is 17.148.17.x and has a switch Someone said I should buy a router to ...
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What's the fastest way to open TCP/IPv4 Properties? in Windows 10

Is there a shortcut to open TCP/IPv4 properties directly I go this way ⊞ win+R ncpa.cpl Click Ethernet Properties Scroll down to TCP/IPv4 and click it Too many steps Assume it's for a PC with a ...
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How does a device retrieves a MAC address that corresponds to the IPv4 address of the device with which it wishes to communicate [closed]

I just need a brief explanation to that same question in the title. All help appreciated.
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Connecting ipv4 client to ipv4 server through ipv6?

Does someone know if it is possible to connect an ipv4 client to an ipv4 server through ipv6, by means of "IPv4 over IPv6" (encapsulation known as MAP-E)? If if is, what would be the requirements for ...
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Windows 10 took long time to resolve host names

The problem I've encountered happens since 1809 update. This is some of the description of what happened: My Windows laptop can connect to Wi-Fi networks. When I connect to it, this happens: The ...
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What is my Gateway?

My wireless router has these items when I set it up, but I don't know the Gateway number. IP Address 192.168.1.100 Subnet Mask 255.255.255.0 DNS Server 192.168.1.1 Secondary DNS Server 0.0.0.0 It ...
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How to create Unreachable routes (IPv4 and IPv6) in Windows?

I need to set some rules to block network traffic, both IPv4 and IPv6. The routes should be a blackhole or unrecheable depending on the case. In Linux and MacOSX seems simple, there are specific ...
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How to make a client-server communication without a Domain Name

In the context of a web application including clients and a web service (server), I want to have a client-server HTTP communication over internet. I'm aware that the IP address is dynamic and may ...
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Lan IP on my wan connection

Do you guys know why I get a reply from a 10.1.1.1 on my internet connection? My setup is just a home router and a laptop Router lan ip is 192.168.1.1 and wan ip is 92.123.x.x Is this normal? ...
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No internet connection with MAC os DHCP with manual address

I want to configure remote management on my macbook pro (2017, 13 inch no touchbar). I go to system preferences -> network->advanced (for my LAN ethernet connection) -> Configure IPv4 (leave IPv6 at ...
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socat UDP IPv6 to IPv4 gateway results in lots of processes

I have an IPv4-only UDP application listening on port 624. I created an IPv6/IPv4 front-end with socat, listening on port 625. I can now use the server's IPv4 or IPv6 address to access the IPv4-only ...
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Do I still need an ipv4 address? Can I just use an ipv6?

I am unsure if this should be on SuperUser or ServerFault. Please migrate it instead of closing it if you think it's offtopic. A few months ago, Vultr got a cheaper plan that only includes an ipv6 ...
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Disable setsockopt(IPV6_V6ONLY)

I love mapped addresses, and some bad software (lighttpd) believes I'm wrong - in fact, the only config key they let me change is whether or not it'll call setsockopt(IPV6_V6ONLY, true). disabling ...
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Trying to Port Forward, but my IPv4 is very strange

I'm not even sure where to start here. I am attempting to port forward. I currently have a Motorola Surfboard and an Arris Router with extenders. The PC that I am attempting to port forward is ...
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Network not working for some domains only on one device

A few days ago my wireless stopped working for most domains. Some domains that still work are google, facebook, youtube. Notworking examples: stripe.com, stackoverflow.com, slack.com The problem ...
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How to connect via ipv4 to ipv6 only OpenVpn?

I want to use my Raspberry Pi as an OpenVPN Server to connect from everywhere to my home network. My ISP provides me only with an IPv6 address, so I can only access the OpenVPN via IPv4. Unfortunately ...

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