The official Debian networking documentation tells to use:
But ifup is not found (ifupdown and ifupdown2 are commands not found too, even after having been installed). Does it have something to do with prefix delegation? If so, do I have to configure it?
And the linux documentation project (i.e. tldp.org) says to use
ip -6 addr add <ipv6address>/<prefixlength> dev <interface>
but ONLY when you have a global IPv6 address, which is not my case. I read other tutorials which nevertheless did'nt enabled me to reach a solution, so I'm asking for help here.
I'm using Debian stable 10.4 with Xfce 4.12 and Zsh 5.7.1.
I have a TP-LINK N900 Wireless PCI Express Adapter TL-WDN4800 and a Intel I219-V Gibabit LAN controller.
As a side note, the Ethernet network dialog in the desktop panel prints: "device not managed".
MAIN OBJECTIVE: I need to activate IPv6 connectivity to fetch some IPv6 web servers.
➜ ping6 wiki.debian.org connect: Network is unreachable
Whereas echo requests with IPv4 work without any loss:
➜ ping4 wiki.debian.org PING wilder.debian.org (22.214.171.124) 56(84) bytes of data. 64 bytes from wilder.debian.org (126.96.36.199): icmp_seq=1 ttl=52 time=35.4 ms 64 bytes from wilder.debian.org (188.8.131.52): icmp_seq=2 ttl=52 time=35.3 ms 64 bytes from wilder.debian.org (184.108.40.206): icmp_seq=3 ttl=52 time=190 ms 64 bytes from wilder.debian.org (220.127.116.11): icmp_seq=4 ttl=52 time=35.3 ms 64 bytes from wilder.debian.org (18.104.22.168): icmp_seq=5 ttl=52 time=181 ms 64 bytes from wilder.debian.org (22.214.171.124): icmp_seq=6 ttl=52 time=181 ms ^C --- wilder.debian.org ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 12ms rtt min/avg/max/mdev = 35.277/109.735/190.063/74.440 ms
Here are my network devices:
➜ ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp0s31f6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000 link/ether 4c:cc:6a:cf:5f:bd brd ff:ff:ff:ff:ff:ff 3: wlp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 18:d6:c7:1c:b7:d5 brd ff:ff:ff:ff:ff:ff inet 192.168.0.189/24 brd 192.168.0.255 scope global dynamic noprefixroute wlp4s0 valid_lft 7171sec preferred_lft 7171sec inet6 fe80::b08:601b:a8d8:1474/64 scope link noprefixroute valid_lft forever preferred_lft forever
You can notice in the before-last line that the LOCAL link address (i.e. fe80::) have a /64 mask, which is a GLOBAL one! A local link mask would be /10 where as a global address would start by 2xxx (e.g. 2001::).
Except for lo which probably means localhost, I do not know what are enp0s31f6 and wl4ps0. I only know that enp0s31f6 was renamed from eth0 but that doesn't explain to me anything, apart from the fact I'm using new syntax for network interfaces names:
➜ sudo dmesg | grep -i eth [ 1.701805] e1000e 0000:00:1f.6 eth0: (PCI Express:2.5GT/s:Width x1) 4c:cc:6a:cf:5f:bd [ 1.701809] e1000e 0000:00:1f.6 eth0: Intel(R) PRO/1000 Network Connection [ 1.701912] e1000e 0000:00:1f.6 eth0: MAC: 12, PHY: 12, PBA No: FFFFFF-0FF [ 1.703934] e1000e 0000:00:1f.6 enp0s31f6: renamed from eth0 [ 7.706185] Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Here are some settings to help you understand my network configuration:
➜ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). source /etc/network/interfaces.d/* # The loopback network interface auto lo iface lo inet loopback auto enp0s31f6 allow-hotplug enp0s31f6 iface enp0s31f6 inet dhcp iface enp0s31f6 inet6 auto
➜ cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 omega.dominion omega # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts
➜ cat /etc/resolv.conf # Generated by NetworkManager nameserver 192.168.0.1
Please can someone help me to correctly set up IPv6 connectivity?
I'm behind a TP-LINK AC1350 wireless router Archer C59 v1.0 (but no proxy configured) (general specs are here: https://www.tp-link.com/us/home-networking/wifi-router/archer-c59/#specifications)
I'm using nn-connection-editor application to manage my network. Here are my current settings:
➜ sudo cat /etc/NetworkManager/system-connections/TP-LINK_902C [connection] id=TP-LINK_902C uuid=f2fef445-f44e-4216-8d51-eb4dd4e23ea6 type=wifi permissions= timestamp=1589139366 [wifi] mac-address-blacklist= mode=infrastructure seen-bssids=50:C7:BF:90:90:2C; ssid=TP-LINK_902C [wifi-security] key-mgmt=wpa-psk psk-flags=1 [ipv4] dns=126.96.36.199;188.8.131.52; dns-search= method=auto [ipv6] addr-gen-mode=eui64 dns-search= ip6-privacy=2 method=auto
Now I run the diagnostic tool ndisc6:
➜ rdisc6 wlp4s0 Soliciting ff02::2 (ff02::2) on wlp4s0... Timed out. Timed out. Timed out. No response.
Which is strange because of the LAN discovery on all routers via echo requests seems to work correctly:
➜ ping -c3 -I wlp4s0 ff02::02 ping6: Warning: source address might be selected on device other than wlp4s0. PING ff02::02(ff02::2) from :: wlp4s0: 56 data bytes 64 bytes from fe80::52c7:bfff:fe90:902c%wlp4s0: icmp_seq=1 ttl=64 time=45.4 ms 64 bytes from fe80::52c7:bfff:fe90:902c%wlp4s0: icmp_seq=2 ttl=64 time=1.65 ms 64 bytes from fe80::52c7:bfff:fe90:902c%wlp4s0: icmp_seq=3 ttl=64 time=1.62 ms --- ff02::02 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 5ms rtt min/avg/max/mdev = 1.624/16.230/45.421/20.641 ms
I took some screenshots from web administration's interface (i.e. http://tplinkwifi.net) to help investigating further:
1) IPv6 internet settings
EDIT2: It seems my modem supplied by my ISP doesn't provide any IPV6 connectivity, so it become clear that I need a more recent modem or a IPv6 tunnel. I from now on consider the question answered and I thank you user4556274, Johan Myréen and bey0nd for your insights :)