6 Jun
2021
6 Jun
'21
1:51 p.m.
Hi all!
I'm experiencing some trouble in dns resolution over ipv6 and I hope
someone can help me!
I'm using the lime packages at version 2020.1 with this configs
https://github.com/libremesh/network-profiles/blob/master/valsamoggia.ninux…
with this packages
https://github.com/libremesh/network-profiles/blob/master/valsamoggia.ninux…
and deselecting these packages
-dnsmasq
-firewall
-odhcpd-ipv6only
-odhcpd
-ppp
* note: I don't know if it's a problem but i can deselect the Base
System > firewall for ath79xx, but not in example for ar71xx e bcm63xx
* note: Not sure if i should also remove odhcp6c
and i just keep the ipv6 configs from previuos versions:
option main_ipv6_address '2a00:1508:0a%N1:%N200::/64'
Now, I'm with an ISP that don't provide ipv6
and some connections fails because the DNS request goes first to ipv6
address, failing, and then to ipv4
Is a good idea trying to remove ipv6 from the network?
Can i experience issues connecting to other nodes with ipv6 enabled?
Is there a risk of compromise the working of the mesh?
If no, will be enough to remove main_ipv6_address from lime-community?
Thanks in advance if for any advice!
Here are some demonstrations:
$ ping google.com
PING google.com(mil41s02-in-x0e.1e100.net (2a00:1450:4002:404::200e)) 56
data bytes
From ninux-561d87 (2a00:1508:afe:c00::871d:5600) icmp_seq=1 Destination
unreachable: Unknown code 5
From ninux-561d87 (2a00:1508:afe:c00::871d:5600) icmp_seq=2 Destination
unreachable: Unknown code 5
From ninux-561d87 (2a00:1508:afe:c00::871d:5600) icmp_seq=3 Destination
unreachable: Unknown code 5
^C
--- google.com ping statistics ---
3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2002ms
$ ping4 google.com
PING (142.250.184.46) 56(84) bytes of data.
64 bytes from mil41s02-in-f14.1e100.net (142.250.184.46): icmp_seq=1
ttl=115 time=78.2 ms
64 bytes from mil41s02-in-f14.1e100.net (142.250.184.46): icmp_seq=2
ttl=115 time=79.4 ms
64 bytes from mil41s02-in-f14.1e100.net (142.250.184.46): icmp_seq=3
ttl=115 time=77.7 ms
^C
--- ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 77.741/78.470/79.432/0.709 ms
With wget i see it tries to resolv firstly ipv6 and then ipv4
$ wget google.com
Resolving www.google.com (www.google.com)... 2a00:1450:4016:803::2004,
172.217.22.196
Connecting to www.google.com
(www.google.com)|2a00:1450:4016:803::2004|:80... failed: Permission denied.
Connecting to www.google.com (www.google.com)|172.217.22.196|:80...
connected.
HTTP request sent, awaiting response... 200 OK
And if my pc i manually remove the ipv6 nameserver leaving only
10.170.0.1 from /etc/resolv.conf
the requests go only in ipv4 and stop failing
$ cat /etc/resolv.conf
# Generated by NetworkManager
search valsamoggia.ninux.org
nameserver 10.170.0.1
nameserver fe80::a8aa:aaff:fefe:caa%wlo1
nameserver fe80::c6ea:1dff:fea3:b68%wlo1
This is the status of the lime-app, showing the ipv6 addresses assigned
System
Uptime 5 hours, 34 minutes, 25 seconds
Device ADB P.DG A4001N
Firmware LiMe 2020.1 development (2020.1 rev. 002a53c 20210603_0623)
Internet connection
✔ IPv4 ✘ IPv6 ✔ DNS
IP Addresses
IPv4 10.170.157.135/16
IPv6 2a00:1508:afe:c00::871d:5600/64
IPv6 fe80::bef6:85ff:fe56:1d87/64
--
gothos
PGP Key ID: 0x6406B32F2CEC0008
PGP Key server: https://keys.openpgp.org/