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 REACHABLE
Konfiguration 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