$ lsb_release -a
No LSB modules are available.
Distributor ID: Pop
Description: Pop!_OS 22.04 LTS
Release: 22.04
Codename: jammy
Bis Sonntag konnte ich mich mit dem Internet verbinden. Am Montag ging es nicht. An meinem PC hat sich nichts geändert. Ich habe nur sudo apt-get updatenicht zu viel heruntergeladen. Soweit ich mich erinnern kann, waren es nur ein paar KB an Daten.
Im Haus können alle Telefone über WLAN eine Verbindung zum Internet herstellen, außer meinem Laptop. Wenn ich das WLAN auswähle, sieht es zunächst so aus, als wäre eine Verbindung vorhanden, aber dann erscheint ein Fragezeichen (?) auf dem WLAN-Symbol. Wenn ich außerdem mein mobiles Internet mit meinem Laptop teile, funktioniert alles einwandfrei.
Das Seltsamste ist, dass ich auch in einem anderen Haus eine Verbindung zum Internet herstellen kann.
$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp47s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
link/ether d8:bb:c1:b1:1d:c1 brd ff:ff:ff:ff:ff:ff
3: wlo1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
link/ether c4:bd:e5:23:9c:9a brd ff:ff:ff:ff:ff:ff
altname wlp0s20f3
4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:aa:aa:8b:28 brd ff:ff:ff:ff:ff:ff
5: br-a593dce43362: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:84:e4:1e:5d brd ff:ff:ff:ff:ff:ff
6: br-c77e5c8b1ce6: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:dd:ac:10:97 brd ff:ff:ff:ff:ff:ff
7: br-c8d5ce7ce6c1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:23:b0:8b:d6 brd ff:ff:ff:ff:ff:ff
8: br-f2e659a6d01a: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:42:33:b3:08 brd ff:ff:ff:ff:ff:ff
9: br-fd59d8ed402b: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:0a:00:a2:96 brd ff:ff:ff:ff:ff:ff
10: br-35b3c8def3c9: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:be:6f:12:8f brd ff:ff:ff:ff:ff:ff
11: br-3a165a5c993a: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:eb:5e:ba:28 brd ff:ff:ff:ff:ff:ff
12: br-4d363be4b599: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:32:57:dd:21 brd ff:ff:ff:ff:ff:ff
13: br-4e168a0cdf31: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:81:00:13:f0 brd ff:ff:ff:ff:ff:ff
14: br-9346c9dd9a25: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:43:b1:ee:3b brd ff:ff:ff:ff:ff:ff
15: br-a28feae6b83c: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:5d:ba:38:c8 brd ff:ff:ff:ff:ff:ff
16: br-1db02a26bdd0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:e4:ff:fe:a0 brd ff:ff:ff:ff:ff:ff
17: br-4ca8610e3d72: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:c7:ee:50:8c brd ff:ff:ff:ff:ff:ff
18: br-604867f1852d: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:db:85:46:ce brd ff:ff:ff:ff:ff:ff
19: br-8166f1f24274: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:90:63:2e:3f brd ff:ff:ff:ff:ff:ff
20: br-3864e73fa63c: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:fa:fe:ab:c1 brd ff:ff:ff:ff:ff:ff
21: br-46e81cf5fb5e: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:2e:dd:b3:a5 brd ff:ff:ff:ff:ff:ff
22: br-dafd9fc1c73f: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
link/ether 02:42:d8:d7:e3:9d brd ff:ff:ff:ff:ff:ff
$ ip -br addr
lo UNKNOWN 127.0.0.1/8 ::1/128
enp47s0 DOWN
wlo1 UP 192.168.0.13/24 fe80::7820:93db:b655:d21f/64
docker0 DOWN 172.17.0.1/16
br-a593dce43362 DOWN 172.18.0.1/16
br-c77e5c8b1ce6 DOWN 192.168.16.1/20
br-c8d5ce7ce6c1 DOWN 172.29.0.1/16
br-f2e659a6d01a DOWN 172.20.0.1/16
br-fd59d8ed402b DOWN 172.28.0.1/16
br-35b3c8def3c9 DOWN 172.30.0.1/16
br-3a165a5c993a DOWN 172.25.0.1/16
br-4d363be4b599 DOWN 172.19.0.1/16
br-4e168a0cdf31 DOWN 172.27.0.1/16
br-9346c9dd9a25 DOWN 172.26.0.1/16
br-a28feae6b83c DOWN 172.21.0.1/16
br-1db02a26bdd0 DOWN 172.31.0.1/16
br-4ca8610e3d72 DOWN 192.168.0.1/20
br-604867f1852d DOWN 172.22.0.1/16
br-8166f1f24274 DOWN 172.24.0.1/16
br-3864e73fa63c DOWN 192.168.49.1/24
br-46e81cf5fb5e DOWN 192.168.240.1/20
br-dafd9fc1c73f DOWN 172.23.0.1/16
$ ip route
default via 192.168.0.1 dev wlo1 proto dhcp metric 600
169.254.0.0/16 dev wlo1 scope link metric 1000
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
172.18.0.0/16 dev br-a593dce43362 proto kernel scope link src 172.18.0.1 linkdown
172.19.0.0/16 dev br-4d363be4b599 proto kernel scope link src 172.19.0.1 linkdown
172.20.0.0/16 dev br-f2e659a6d01a proto kernel scope link src 172.20.0.1 linkdown
172.21.0.0/16 dev br-a28feae6b83c proto kernel scope link src 172.21.0.1 linkdown
172.22.0.0/16 dev br-604867f1852d proto kernel scope link src 172.22.0.1 linkdown
172.23.0.0/16 dev br-dafd9fc1c73f proto kernel scope link src 172.23.0.1 linkdown
172.24.0.0/16 dev br-8166f1f24274 proto kernel scope link src 172.24.0.1 linkdown
172.25.0.0/16 dev br-3a165a5c993a proto kernel scope link src 172.25.0.1 linkdown
172.26.0.0/16 dev br-9346c9dd9a25 proto kernel scope link src 172.26.0.1 linkdown
172.27.0.0/16 dev br-4e168a0cdf31 proto kernel scope link src 172.27.0.1 linkdown
172.28.0.0/16 dev br-fd59d8ed402b proto kernel scope link src 172.28.0.1 linkdown
172.29.0.0/16 dev br-c8d5ce7ce6c1 proto kernel scope link src 172.29.0.1 linkdown
172.30.0.0/16 dev br-35b3c8def3c9 proto kernel scope link src 172.30.0.1 linkdown
172.31.0.0/16 dev br-1db02a26bdd0 proto kernel scope link src 172.31.0.1 linkdown
192.168.0.0/24 dev wlo1 proto kernel scope link src 192.168.0.13 metric 600
192.168.0.0/20 dev br-4ca8610e3d72 proto kernel scope link src 192.168.0.1 linkdown
192.168.16.0/20 dev br-c77e5c8b1ce6 proto kernel scope link src 192.168.16.1 linkdown
192.168.49.0/24 dev br-3864e73fa63c proto kernel scope link src 192.168.49.1 linkdown
192.168.240.0/20 dev br-46e81cf5fb5e proto kernel scope link src 192.168.240.1 linkdown
$ ip neigh
192.168.0.11 dev wlo1 lladdr 42:3f:8c:00:d9:f7 STALE
192.168.0.1 dev wlo1 lladdr e4:26:86:aa:d8:44 REACHABLE
$ sudo iptables-save -c
# Generated by iptables-save v1.8.7 on Tue Apr 16 20:35:55 2024
*filter
:INPUT ACCEPT [0:0]
:FORWARD DROP [3:673]
:OUTPUT ACCEPT [0:0]
:DOCKER - [0:0]
:DOCKER-ISOLATION-STAGE-1 - [0:0]
:DOCKER-ISOLATION-STAGE-2 - [0:0]
:DOCKER-USER - [0:0]
[3:673] -A FORWARD -j DOCKER-USER
[3:673] -A FORWARD -j DOCKER-ISOLATION-STAGE-1
[0:0] -A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o docker0 -j DOCKER
[0:0] -A FORWARD -i docker0 ! -o docker0 -j ACCEPT
[0:0] -A FORWARD -i docker0 -o docker0 -j ACCEPT
[0:0] -A FORWARD -o br-dafd9fc1c73f -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-dafd9fc1c73f -j DOCKER
[0:0] -A FORWARD -i br-dafd9fc1c73f ! -o br-dafd9fc1c73f -j ACCEPT
[0:0] -A FORWARD -i br-dafd9fc1c73f -o br-dafd9fc1c73f -j ACCEPT
[0:0] -A FORWARD -o br-46e81cf5fb5e -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-46e81cf5fb5e -j DOCKER
[0:0] -A FORWARD -i br-46e81cf5fb5e ! -o br-46e81cf5fb5e -j ACCEPT
[0:0] -A FORWARD -i br-46e81cf5fb5e -o br-46e81cf5fb5e -j ACCEPT
[0:0] -A FORWARD -o br-3864e73fa63c -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-3864e73fa63c -j DOCKER
[0:0] -A FORWARD -i br-3864e73fa63c ! -o br-3864e73fa63c -j ACCEPT
[0:0] -A FORWARD -i br-3864e73fa63c -o br-3864e73fa63c -j ACCEPT
[0:0] -A FORWARD -o br-8166f1f24274 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-8166f1f24274 -j DOCKER
[0:0] -A FORWARD -i br-8166f1f24274 ! -o br-8166f1f24274 -j ACCEPT
[0:0] -A FORWARD -i br-8166f1f24274 -o br-8166f1f24274 -j ACCEPT
[0:0] -A FORWARD -o br-604867f1852d -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-604867f1852d -j DOCKER
[0:0] -A FORWARD -i br-604867f1852d ! -o br-604867f1852d -j ACCEPT
[0:0] -A FORWARD -i br-604867f1852d -o br-604867f1852d -j ACCEPT
[0:0] -A FORWARD -o br-4ca8610e3d72 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-4ca8610e3d72 -j DOCKER
[0:0] -A FORWARD -i br-4ca8610e3d72 ! -o br-4ca8610e3d72 -j ACCEPT
[0:0] -A FORWARD -i br-4ca8610e3d72 -o br-4ca8610e3d72 -j ACCEPT
[0:0] -A FORWARD -o br-1db02a26bdd0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-1db02a26bdd0 -j DOCKER
[0:0] -A FORWARD -i br-1db02a26bdd0 ! -o br-1db02a26bdd0 -j ACCEPT
[0:0] -A FORWARD -i br-1db02a26bdd0 -o br-1db02a26bdd0 -j ACCEPT
[0:0] -A FORWARD -o br-a28feae6b83c -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-a28feae6b83c -j DOCKER
[0:0] -A FORWARD -i br-a28feae6b83c ! -o br-a28feae6b83c -j ACCEPT
[0:0] -A FORWARD -i br-a28feae6b83c -o br-a28feae6b83c -j ACCEPT
[0:0] -A FORWARD -o br-9346c9dd9a25 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-9346c9dd9a25 -j DOCKER
[0:0] -A FORWARD -i br-9346c9dd9a25 ! -o br-9346c9dd9a25 -j ACCEPT
[0:0] -A FORWARD -i br-9346c9dd9a25 -o br-9346c9dd9a25 -j ACCEPT
[0:0] -A FORWARD -o br-4e168a0cdf31 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-4e168a0cdf31 -j DOCKER
[0:0] -A FORWARD -i br-4e168a0cdf31 ! -o br-4e168a0cdf31 -j ACCEPT
[0:0] -A FORWARD -i br-4e168a0cdf31 -o br-4e168a0cdf31 -j ACCEPT
[0:0] -A FORWARD -o br-4d363be4b599 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-4d363be4b599 -j DOCKER
[0:0] -A FORWARD -i br-4d363be4b599 ! -o br-4d363be4b599 -j ACCEPT
[0:0] -A FORWARD -i br-4d363be4b599 -o br-4d363be4b599 -j ACCEPT
[0:0] -A FORWARD -o br-3a165a5c993a -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-3a165a5c993a -j DOCKER
[0:0] -A FORWARD -i br-3a165a5c993a ! -o br-3a165a5c993a -j ACCEPT
[0:0] -A FORWARD -i br-3a165a5c993a -o br-3a165a5c993a -j ACCEPT
[0:0] -A FORWARD -o br-35b3c8def3c9 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-35b3c8def3c9 -j DOCKER
[0:0] -A FORWARD -i br-35b3c8def3c9 ! -o br-35b3c8def3c9 -j ACCEPT
[0:0] -A FORWARD -i br-35b3c8def3c9 -o br-35b3c8def3c9 -j ACCEPT
[0:0] -A FORWARD -o br-fd59d8ed402b -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-fd59d8ed402b -j DOCKER
[0:0] -A FORWARD -i br-fd59d8ed402b ! -o br-fd59d8ed402b -j ACCEPT
[0:0] -A FORWARD -i br-fd59d8ed402b -o br-fd59d8ed402b -j ACCEPT
[0:0] -A FORWARD -o br-f2e659a6d01a -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-f2e659a6d01a -j DOCKER
[0:0] -A FORWARD -i br-f2e659a6d01a ! -o br-f2e659a6d01a -j ACCEPT
[0:0] -A FORWARD -i br-f2e659a6d01a -o br-f2e659a6d01a -j ACCEPT
[0:0] -A FORWARD -o br-c8d5ce7ce6c1 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-c8d5ce7ce6c1 -j DOCKER
[0:0] -A FORWARD -i br-c8d5ce7ce6c1 ! -o br-c8d5ce7ce6c1 -j ACCEPT
[0:0] -A FORWARD -i br-c8d5ce7ce6c1 -o br-c8d5ce7ce6c1 -j ACCEPT
[0:0] -A FORWARD -o br-c77e5c8b1ce6 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-c77e5c8b1ce6 -j DOCKER
[0:0] -A FORWARD -i br-c77e5c8b1ce6 ! -o br-c77e5c8b1ce6 -j ACCEPT
[0:0] -A FORWARD -i br-c77e5c8b1ce6 -o br-c77e5c8b1ce6 -j ACCEPT
[0:0] -A FORWARD -o br-a593dce43362 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
[0:0] -A FORWARD -o br-a593dce43362 -j DOCKER
[0:0] -A FORWARD -i br-a593dce43362 ! -o br-a593dce43362 -j ACCEPT
[0:0] -A FORWARD -i br-a593dce43362 -o br-a593dce43362 -j ACCEPT
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i docker0 ! -o docker0 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-dafd9fc1c73f ! -o br-dafd9fc1c73f -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-46e81cf5fb5e ! -o br-46e81cf5fb5e -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-3864e73fa63c ! -o br-3864e73fa63c -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-8166f1f24274 ! -o br-8166f1f24274 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-604867f1852d ! -o br-604867f1852d -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-4ca8610e3d72 ! -o br-4ca8610e3d72 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-1db02a26bdd0 ! -o br-1db02a26bdd0 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-a28feae6b83c ! -o br-a28feae6b83c -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-9346c9dd9a25 ! -o br-9346c9dd9a25 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-4e168a0cdf31 ! -o br-4e168a0cdf31 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-4d363be4b599 ! -o br-4d363be4b599 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-3a165a5c993a ! -o br-3a165a5c993a -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-35b3c8def3c9 ! -o br-35b3c8def3c9 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-fd59d8ed402b ! -o br-fd59d8ed402b -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-f2e659a6d01a ! -o br-f2e659a6d01a -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-c8d5ce7ce6c1 ! -o br-c8d5ce7ce6c1 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-c77e5c8b1ce6 ! -o br-c77e5c8b1ce6 -j DOCKER-ISOLATION-STAGE-2
[0:0] -A DOCKER-ISOLATION-STAGE-1 -i br-a593dce43362 ! -o br-a593dce43362 -j DOCKER-ISOLATION-STAGE-2
[3:673] -A DOCKER-ISOLATION-STAGE-1 -j RETURN
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o docker0 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-dafd9fc1c73f -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-46e81cf5fb5e -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-3864e73fa63c -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-8166f1f24274 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-604867f1852d -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-4ca8610e3d72 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-1db02a26bdd0 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-a28feae6b83c -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-9346c9dd9a25 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-4e168a0cdf31 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-4d363be4b599 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-3a165a5c993a -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-35b3c8def3c9 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-fd59d8ed402b -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-f2e659a6d01a -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-c8d5ce7ce6c1 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-c77e5c8b1ce6 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -o br-a593dce43362 -j DROP
[0:0] -A DOCKER-ISOLATION-STAGE-2 -j RETURN
[3:673] -A DOCKER-USER -j RETURN
COMMIT
# Completed on Tue Apr 16 20:35:55 2024
# Generated by iptables-save v1.8.7 on Tue Apr 16 20:35:55 2024
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:DOCKER - [0:0]
[3:1090] -A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
[778:52788] -A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
[0:0] -A POSTROUTING -s 172.17.0.0/16 ! -o docker0 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.23.0.0/16 ! -o br-dafd9fc1c73f -j MASQUERADE
[0:0] -A POSTROUTING -s 192.168.240.0/20 ! -o br-46e81cf5fb5e -j MASQUERADE
[0:0] -A POSTROUTING -s 192.168.49.0/24 ! -o br-3864e73fa63c -j MASQUERADE
[0:0] -A POSTROUTING -s 172.24.0.0/16 ! -o br-8166f1f24274 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.22.0.0/16 ! -o br-604867f1852d -j MASQUERADE
[2202:192320] -A POSTROUTING -s 192.168.0.0/20 ! -o br-4ca8610e3d72 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.31.0.0/16 ! -o br-1db02a26bdd0 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.21.0.0/16 ! -o br-a28feae6b83c -j MASQUERADE
[0:0] -A POSTROUTING -s 172.26.0.0/16 ! -o br-9346c9dd9a25 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.27.0.0/16 ! -o br-4e168a0cdf31 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.19.0.0/16 ! -o br-4d363be4b599 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.25.0.0/16 ! -o br-3a165a5c993a -j MASQUERADE
[0:0] -A POSTROUTING -s 172.30.0.0/16 ! -o br-35b3c8def3c9 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.28.0.0/16 ! -o br-fd59d8ed402b -j MASQUERADE
[631:65752] -A POSTROUTING -s 172.20.0.0/16 ! -o br-f2e659a6d01a -j MASQUERADE
[0:0] -A POSTROUTING -s 172.29.0.0/16 ! -o br-c8d5ce7ce6c1 -j MASQUERADE
[0:0] -A POSTROUTING -s 192.168.16.0/20 ! -o br-c77e5c8b1ce6 -j MASQUERADE
[0:0] -A POSTROUTING -s 172.18.0.0/16 ! -o br-a593dce43362 -j MASQUERADE
[0:0] -A DOCKER -i docker0 -j RETURN
[0:0] -A DOCKER -i br-dafd9fc1c73f -j RETURN
[0:0] -A DOCKER -i br-46e81cf5fb5e -j RETURN
[0:0] -A DOCKER -i br-3864e73fa63c -j RETURN
[0:0] -A DOCKER -i br-8166f1f24274 -j RETURN
[0:0] -A DOCKER -i br-604867f1852d -j RETURN
[0:0] -A DOCKER -i br-4ca8610e3d72 -j RETURN
[0:0] -A DOCKER -i br-1db02a26bdd0 -j RETURN
[0:0] -A DOCKER -i br-a28feae6b83c -j RETURN
[0:0] -A DOCKER -i br-9346c9dd9a25 -j RETURN
[0:0] -A DOCKER -i br-4e168a0cdf31 -j RETURN
[0:0] -A DOCKER -i br-4d363be4b599 -j RETURN
[0:0] -A DOCKER -i br-3a165a5c993a -j RETURN
[0:0] -A DOCKER -i br-35b3c8def3c9 -j RETURN
[0:0] -A DOCKER -i br-fd59d8ed402b -j RETURN
[0:0] -A DOCKER -i br-f2e659a6d01a -j RETURN
[0:0] -A DOCKER -i br-c8d5ce7ce6c1 -j RETURN
[0:0] -A DOCKER -i br-c77e5c8b1ce6 -j RETURN
[0:0] -A DOCKER -i br-a593dce43362 -j RETURN
COMMIT
# Completed on Tue Apr 16 20:35:55 2024
Antwort1
Kurz zusammengefasst: Docker die Schuld geben.
Ihr WLAN-Gateway hat die IP-Adresse 192.168.0.1/24.
Eines Ihrer zahlreichen Docker-Netzwerke verwendet 192.168.0.0/20 mit einer lokalen Host-IP-Adresse von 192.168.0.1/20: dieselbe wie das Gateway (auch wenn die Netzmaske anders ist).
Dies führt zu Routing-Konflikten beim Versuch, das Gateway für die Standardroute zum Internet zu erreichen: 192.168.0.1 ist eine lokale Adresse.
Ich vermute, dass dadurch das gesamte Internet in ein LAN verwandelt werden könnte (denn sich selbst als Gateway zu verwenden ist dasselbe, wie kein Gateway zu haben): Einige Anfragen an Internet-IP-Adressen lösen eine ARP-Anfrage aus, anstatt das Gateway zu verwenden.
Die schnelle (aber vorübergehende) Lösung: Stoppen Sie Docker und entfernen Sie die widersprüchliche Bridge-Schnittstelle:
sudo systemctl stop docker docker.socket
sudo ip link del dev br-4ca8610e3d72
Die eigentliche Lösung besteht darin, alle Docker-Netzwerke zu entfernen (mit docker network pruneoder docker network rm ...) und die Konfiguration von Docker so zu ändern, dass es die in Konflikt stehenden Netzwerke nicht verwendet. Sehen Sie sich beispielsweise diese Serverfault-Frage und -Antwort an:
Konfigurieren von Docker, um den Bereich 172.17.0.0 nicht zu verwenden
(und verwenden Sie etwas im 10. ...-Bereich)
Möglicherweise möchten Sie auch regelmäßig ungenutzte Docker-Ressourcen bereinigen (normalerweise ) docker ... prune ..., damit es nicht zu einer solchen Ansammlung von Docker-Netzwerken kommt.