Hallo,
nachdem wir einen Router gekauft haben funktioniert manchmal das Internet nicht mehr. Im Panel wird dann zwar "Verbunden" angezeigt, aber man kann keine Internetseiten aufrufen. Das Problem gibt es mit allen Geräten (ein Laptop, zwei PCs und zwei Handys), sowohl unter Linux als unter Windows, bei Kabel und bei WLAN Verbindungen. Hat jemand eine Idee woran das liegen könnte?
Ein paar Informationen zum System:
Router: TP-LINK TD-W9980B
Anbieter: Vodafone
Unter Ubuntu Live CD mit Kabelverbindung zum Router:
Verwendete Kernelversion
ubuntu@ubuntu:~$ uname -a Linux ubuntu 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Abfrage für PCI und PCMCIA-Karten
ubuntu@ubuntu:~$ lspci -nnk | grep -i net -A2 03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 06) Subsystem: ASRock Incorporation Motherboard (one of many) [1849:8168] Kernel driver in use: r8169
Netzwerkkonfiguration des Systems
ubuntu@ubuntu:~$ cat /etc/network/interfaces # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback ubuntu@ubuntu:~$ cat /etc/resolv.conf # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 127.0.1.1 ubuntu@ubuntu:~$ cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 ubuntu # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts
aktuelle Netzwerkkonfiguration
ubuntu@ubuntu:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:25:22:fe:6c:e2
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::225:22ff:fefe:6ce2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:329 errors:0 dropped:0 overruns:0 frame:0
TX packets:210 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:48144 (48.1 KB) TX bytes:21536 (21.5 KB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:177 errors:0 dropped:0 overruns:0 frame:0
TX packets:177 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:13307 (13.3 KB) TX bytes:13307 (13.3 KB)
wlan0 Link encap:Ethernet HWaddr 80:1f:02:1b:e2:4b
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
ubuntu@ubuntu:~$ iwconfig
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
lo no wireless extensions.
ubuntu@ubuntu:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0
ubuntu@ubuntu:~$ arp -av
? (192.168.1.1) at 14:cc:20:e6:58:21 [ether] on eth0
Entries: 1 Skipped: 0 Found: 1
ubuntu@ubuntu:~$ ip neigh show
fe80::8ca6:83ff:fe61:b63 dev eth0 lladdr 14:cc:20:e6:58:21 router STALE
192.168.1.1 dev eth0 lladdr 14:cc:20:e6:58:21 REACHABLEKonfiguration des NetworkManagers
ubuntu@ubuntu:~$ cat /var/lib/NetworkManager/NetworkManager.state [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ubuntu@ubuntu:~$ cat /etc/NetworkManager/NetworkManager.conf [main] plugins=ifupdown,keyfile,ofono dns=dnsmasq [ifupdown] managed=false
Zuordnung der Schnittstellen:
ubuntu@ubuntu:~$ cat /etc/udev/rules.d/70-persistent-net.rules | egrep -i 'device|sub' -A3
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:25:22:fe:6c:e2", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# USB device 0x:0x (rtl8192cu)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="80:1f:02:1b:e2:4b", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
Wie weit funktioniert die Verbindung zum Internet?
ubuntu@ubuntu:~$ ping -c 2 $(route -n | grep UG | awk {'print $2'})
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.325 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.310 ms
--- 192.168.1.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.310/0.317/0.325/0.019 ms
ubuntu@ubuntu:~$ ping -c 2 www.ubuntuusers.de
ping: unknown host www.ubuntuusers.de
ubuntu@ubuntu:~$ ping -c 213.95.41.4
Usage: ping [-aAbBdDfhLnOqrRUvV] [-c count] [-i interval] [-I interface]
[-m mark] [-M pmtudisc_option] [-l preload] [-p pattern] [-Q tos]
[-s packetsize] [-S sndbuf] [-t ttl] [-T timestamp_option]
[-w deadline] [-W timeout] [hop1 ...] destination
ubuntu@ubuntu:~$ ping -c 2 213.95.41.4
PING 213.95.41.4 (213.95.41.4) 56(84) bytes of data.
From 192.168.1.1 icmp_seq=1 Destination Net Unreachable
From 192.168.1.1 icmp_seq=2 Destination Net Unreachable
--- 213.95.41.4 ping statistics ---
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 1000ms