Questions tagged [ipv6]
Questions about IPv6, the newest version of the Internet Protocol. This tag should be used when asking about personal/home network IPv6 addressing, or basic IPv6 knowledge. Questions related to company-grade IPv6 networks are off-topic and should be asked on Network engineering SE.
1,295
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IPv4 failing, link-local IPv6 works
For some reason, I can't reach my laptop by SSH over WiFi on its IPv4 address, as it always just times out. However, connecting to it via link-local IPv6 works just fine.
Pinging the laptop over its ...
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Router firewall blocking local ssh access using local-link ipv6
The question was originally posted at ask Ubuntu, as originally sounded as being Ubuntu related. But it appears more related to subjects like networking, firewall, etc. as the results differ if router ...
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Cannot establish IPv6 connection with strongswan using IKEv2 and MSCHAPv2 Host-To-Host (Legacy configuration)
I am unable to get a connection with IPv6 host-to-host.
Below is the log output (anonymized)
Sep 27 14:25:18 vpn.xxxx.tld ipsec[13769]: 00[DMN] Starting IKE charon daemon (strongSwan 5.9.8, Linux 6.1....
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How to setup a VPN on a Fritzbox 6690 Cable without IPv4
So I have a Vodafone Contract and need to route all my traffic through a VPN.
Unfortunately they only provide IPv6 adresses and handle IPv4 trough DS-Lite.
I called with customer support and it's not ...
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1
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57
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Lag on internet connection in terminal programs
I have been suffering a 5-10 second lag from EVERY connection in a new browser tab, or a curl request. I have found out on the Internet that I should disable IPv6. But when I disabled IPv6 the Chrome ...
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Static IPv6 addresses have slightly higher latency than dynamic
My apartment assigns public /64 IPv6 addresses for each client.
I happened to find if I set my IPv6 address static (2xxx:xxxx:xxxx:xxxx::2/64), it has a higher latency:
root@router ~# ip a show eth4
7:...
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153
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Why doesn't this /120 ipv6 subnet route?
I think I am missing a very simple detail, and an answer to my question already exists, but I don't know what words to use to search, so with apologies, I ask this question:
In my Linux VPS host I am ...
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How to get ip address from Modem to Router
I've been having network failures, possibly a variety of sources, but I've now narrowed it down to the "connection" between my Ubiquiti Edgerouter X and the Arris Modem. (for Modem to ...
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1
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273
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How to ensure IPv6 link-local address format with MAC
On my custom Yocto Linux build, I want to use IPv6 link local address. I have got address fe80::bdc2:521:a893:b757/64, but my MAC address is e4:5f:01:75:d3:04. As I know, they should correspond. I'm ...
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554
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Pinging my ipv6 address is responded to by an unknown ipv4 address
I was recently doing some testing with IPv6 addresses to get a better understanding on how it all works. I checked my local "ipconfig" on windows and saw my my local v6 address, and also ...
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Why can't I connect to my server in some instances?
I have created a server that is connected my home network. Although this should not be relevant to the question, it is running Ubuntu 22.04, and right now I am running (and trying to connect to) the ...
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`IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready` message repeating every minute
I am using my Linux system for running some serverless functions using OpenFaaS.
I have placed the required invocation command in a shell script and I am constantly running the shell script using a ...
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How can i connect to my home server that runs on a network using DS-Lite from a Ipv4 network?
I over the past year tryed to put up a home server and beeing able to conect to it from other networks, aspceially to host game servers for me and friends. Yet we always ran into the issue that some ...
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How to automatically assign ULA via SLAAC?
I have an OpenBSD router configured to send GUA and ULA prefixes in Router Advertisements. I can see that both prefixes in packet captures but only a GUA address is assigned.
Is there something I need ...
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1
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How to turn on IPv6 on an Amazon EC2 instance?
Amazon recently announced they're going to start charging for IPv4 addresses.
How do you tell AWS to allocate an IPv6 address? When I go to my EC2 instance, I see this:
When I try to change the ...
2
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1
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324
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Why is my public IPv6 address different from the one listed in linux
Going to [whatismyip.com][1] on different devices inside my home network provides expected results, the same IPv4 address and different IPv6 addresses on each device. However, upon looking at the ...
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[SQUID-6.1]: Setup Squid ipv4 to ipv6 proxy
I'm trying to setup a squid proxy that will accept multiple inbound connections on one IPv4 across a range of ports, and for each port connection to connect out on a unique IPv6 address.
I can ...
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190
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ssh access denied via ipv4 but normal access via ipv6
I'm running Ubuntu 19 or 20 (both scenarios same)
I can ping and ssh over ipv4 to my server.
When i ssh it over ip4 it even asks for the username and password but denies access and shows "access ...
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1
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453
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How to prevent Windows 10 from reverting skipped DHCPv6 IPv6 address? Or how to disable DHCPv6?
My school allocated a /64 prefix IPv6 block to all my schoolmates, I want to fix the 64 bit suffix of my Windows 10 22H2 PC, so I executed the following PowerShell script to set my custom IPv6 address ...
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"Remote desktop connection low virtual memory" with connection from Win 10 to Ubuntu 22.04 using ipv6 address
I have exactly the same question as this question. The difference is my client is Windows 10 and my server is Ubuntu 22.04. Because I don't have enough reputations in this community, I can add nothing ...
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Firewalld blocking IPv6 proxy in Fedora Linux with sing-box Core
I'm facing an issue with Firewalld in Fedora Linux, where it seems to be blocking my IPv6 proxy when using Singbox Core in tun mode. When I stop the Firewalld service, the proxy works fine.
I suspect ...
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317
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How to diagnose slow PiVPN speeds?
I'm using an Oracle free tier arm VPS on Ubuntu 22.04 as a VPN server. I have set it up with PiVPN + Pihole. The VPS has ipv6 and ipv4 connectivity. When I connect to the VPN (wireguard protocol) and ...
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Cannot connect to ipv6 address
I got public ipv6 on my android phone by my ISP. I ran a http server on that phone and checked on https://port.tools/port-checker-ipv6/ to see if it is visible, and yes it was visible. I can connect ...
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1
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How does one create nftables rule that accepts connections from the same IPv6 subnet, when the IPv6 prefix is dynamic?
For IPv4, it is easy to create a rule that only accepts connections from hosts of the same subnet, for example (assuming my computer is 192.168.42.2, and the incoming connection is 192.168.42.20):
...
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1
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447
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Public IPv4 and IPv6 addresses are located in different countries while using VPN
I am currently physically located in Mainland China, so I use a VPN by a European university. With this VPN, I can normally access censored sites and many websites appear to locate me in Europe, but ...
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1
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614
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Set ufw to allow incoming traffic from common IPv6 prefix
I want to set up IPv4/IPv6 dual stack on my internet connection and my local network. To that end I want to change the firewalls on some of the machines to allow incoming traffic for certain ...
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1
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315
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Poor Linux IP tunnel performance
I'm attempting to setup a protocol 41 tunnel between 2 networks over the internet using the Linux ip6tnl interface. Running iperf between the 2 networks directly over the internet results in around ...
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476
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Mobaxterm is crashing on DNS ipv6 connection
When I connect using ipv4 to my server, using DNS or not, or by ipv6 without DNS, the connection is done smoothly.
However, when I use DNS and ipv6, after the banner message, the Mobaxterm freezes and ...
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2k
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How to interpret Open | Filtered status of port scan?
I have Softether VPN server running on Windows 10 PC. My ISP offers me CGNAT (IP4) and GUA (IP6).
I have configured it to accept L2TP Ipsec with preshared key.
Now I am checking the open port status ...
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647
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Windows 10 and IPv6 link-local address
As far as I know, IPv6 is calculated from the MAC Address (EUI-64 Method) and it is autoconfigured whether there is a DHCP or not.
So I enabled TCP/IPv6 on my Windows 10 and used ipconfig /all, but ...
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241
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How can a faulty DNS entry in the router's RA cause WiFi disconnections on a phone?
I have a home network with a router provided by the ISP (Free in France). This router supports IPv6 and broadcasts RA which includes the DNS to use. It also offers DHCP services and forwards DNS ...
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669
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How can I overwrite the default gateway which radvd is advertising
I have flat network with 7 nodes, one of the nodes act as the DHCPv6 server and also runs radvd.
When used like that, radvd will use the helper node (local-link) IP as the gateway when sending the RA.
...
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145
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Windows server ipv6 dhcp
I'm sorry but i'm stuck since a lot of time now.
I tried to make a scope for ipv6 at my home, i have a windows server 2019 machine that manages a lot of things.
I don't understand why but i can't have ...
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1
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1k
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How to disable/prevent default ipv6 route with systemd-networkd
I'm using systemd-networkd on my linux router, and this is ip -6 route output:
::1 dev lo proto kernel metric 256 pref medium
240e:3b0:3041:4df::/64 dev ppp0 proto ra metric 1024 expires 2591826sec ...
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1
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118
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Define route that is preferred "always"
I'm currently implementing an IPv6 only service. Since it should also be consumed using IPv4, I'm implementing a translator.
In the translator server, I need to add a route to a different netns to be ...
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1
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947
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How to check which IPv6 is being announced in my network on Linux
My ISP provides IPv6 connectivity, but they say nothing about prefix length. However, my router must be announcing some prefix to the network for IPv6 configuration to take place.
Is there a command ...
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0
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84
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how to route traffic of google.com from ipv6
im running a openvpn server on rocky linux 9 server. it has both ipv4 and ipv6 public ip, however im trying to add a static route so i connect to google.com using ipv4.
something like this would work :...
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1
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372
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What causes IPv6 ping of linux guest to drop packets in cyclical fashion on Win 10?
I'm trying to ping a linux virtual machine from a Win 10 host. IPv4 works perfectly fine, but trying to use a local IPv6 address drops packets cyclically in the following pattern.
Does anybody have an ...
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0
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638
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Configure an Windows 10 host to acquire IPv6 using stateless DHCPv6 despites router configured as statefull
I have one home router that provides no advanced configuration option for IPv6 DHCP (only a checkbox IPv6 enable/disable, so I cannot configure it to use stateless dhcp). The default behavior of an ...
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1
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304
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How do I prevent ipv6 addresses being used in a mixed ipv4 ipv6 environment?
I have a raspberry pi in a closed network at a remote site. The closed network has a Teltonika RUT-951 router that connects back to base over a VPN across the remote site's LAN and Internet; with a ...
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402
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How to add IPv6 static route via host on other network?
I have a bunch of IPv6-only hosts in location A. To let them connect to IPv4-only hosts, I have set up a NAT64 gateway on a dual-stack host in location B. Now I want the IPv6-only hosts in location A ...
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Which inbound/outbound rules are necessary for stable IPv6 connectivity in Windows 10/11?
I'm experiencing an issue with Windows 10 where IPv6 connectivity becomes unstable over time. Initially, IPv6 works as expected, but after a while, it stops working. Upon investigation, I've ...
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635
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IPv6 and/or 'dnsmasq' for DNS | DHCP also
Preface
I'm far from being a network manager, and not really know much about IPv6 (yet), but slowly I have to.
I have an RPi4 based server in my home, basically for Home Assistant smart-home ...
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1
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392
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mariadb 10.1: Access denied for user, from ipv6 only
Adding an access record with host %, or with host smtp.acme.com does not provide access when accessing via IPv6. Nor does using the specific IPv6 address. I only get 'access denied'.
The SQL server is ...
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147
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FedoraServer ssh traffic on ipv6 blocked
I have my domain setup for ipv6 as well as ipv4. For accessing the https site it all works well.
But when trying to connect to ssh via ipv6 it does not work. You can see in the log below, my ssh ...
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1
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490
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Dynamic DNS NAT for IPv4 and AAAA for IPv6 - is it possible?
I have a router named alice, and servers named bob and charlie. I want to be able to use IPv6 to go directly to alice, bob, or charlie, and I want IPv4 to continue to work, giving me alice's address ...
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Bound extra ipv6 adress
Im new to Linux, and i'm still learning to setup everything.
I have main adress ipv4, i would like to add extra IPv6 adress to my server.
Im using Ubuntu 20.04.
My provider gave me IPv6 adress: 2a01:...
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2
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859
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Determine which IP address will be used for default route in Powershell
There could be multiple addresses of one Network Interface Card in Windows, such as global unicast IPv6 addresses assigned via DHCPv6, SLAAC, temporary IPv6 or manually, etc. At the same time, there ...
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195
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Do you have to join the broadcast group for IPv6 multicast?
When a client joins a network, is the client included in the ff02::1 IPv6 multicast group, which "broadcasts" to all nodes on the segment. OR, do I have to subscribe to the group using ...
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462
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Configure an IPv6 tunnel to use its routed IPv6 network
When creating an IPv6 tunnel with tunnelbroker.net, the Tunnel Broker service assigns you a client IPv6 address to be used on the router and a routed IPv6 network to be used by the systems in the ...