I have both wifi and lan connection to my pc, the wifi has internet and the lan connects me to other pc's on the home network.
If I unplug/disconnect the lan, the internet works, but when both wifi and lan are connected the internet works momentarily and then disconnects. I cannot open any website, even ping does not work here, for example "ping google.com" gives:
ping: unknown host google.com
But I can ping the ip's on the internet, for example "ping 8.8.8.8" gives follows:
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=56 time=110 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=56 time=98.4 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=56 time=101 ms ^C --- 8.8.8.8 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 98.492/103.462/110.263/4.983 ms Output of Wireless info Script is as follows:
########## wireless info START ########## Report from: 01 Jan 2016 23:18 IST +0530 Booted last: 01 Jan 2016 22:31 IST +0530 Script from: 27 Sep 2015 00:34 UTC +0000 ##### release ########################### Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty ##### kernel ############################ Linux 3.16.0-55-generic #74~14.04.1-Ubuntu SMP Tue Nov 17 10:16:12 UTC 2015 i686 athlon i686 GNU/Linux Parameters: ro, quiet, splash, vt.handoff=7 ##### desktop ########################### Lubuntu ##### lspci ############################# 00:07.0 Bridge [0680]: NVIDIA Corporation MCP61 Ethernet [10de:03ef] (rev a2) Subsystem: ASUSTeK Computer Inc. Device [1043:8234] Kernel driver in use: forcedeth ##### lsusb ############################# Bus 001 Device 002: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub ##### PCMCIA card info ################## 'pccardctl' is not installed (package "pcmciautils"). ##### rfkill ############################ 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no ##### lsmod ############################# rt2800usb 26712 0 rt2x00usb 20041 1 rt2800usb rt2800lib 83150 1 rt2800usb rt2x00lib 48886 3 rt2x00usb,rt2800lib,rt2800usb mac80211 563196 3 rt2x00lib,rt2x00usb,rt2800lib cfg80211 422935 2 mac80211,rt2x00lib crc_ccitt 12627 1 rt2800lib mxm_wmi 12893 1 nouveau wmi 18689 2 mxm_wmi,nouveau ##### interfaces ######################## auto lo iface lo inet loopback ##### ifconfig ########################## eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]> inet addr:192.168.0.100 Bcast:192.168.0.127 Mask:255.255.255.128 inet6 addr: fe80::<IP6 'eth0' [IF]>/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:11067 errors:0 dropped:0 overruns:0 frame:0 TX packets:15850 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:770753 (770.7 KB) TX bytes:14862732 (14.8 MB) wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]> inet addr:192.168.1.102 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::<IP6 'wlan0' [IF]>/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2574 errors:0 dropped:0 overruns:0 frame:0 TX packets:2434 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:604557 (604.5 KB) TX bytes:350301 (350.3 KB) ##### iwconfig ########################## lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"Tata-Photon-Max-Wi-Fi-4994" Mode:Managed Frequency:2.462 GHz Access Point: <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> Bit Rate=39 Mb/s Tx-Power=20 dBm Retry short limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=39/70 Signal level=-71 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:4 Invalid misc:4 Missed beacon:0 ##### route ############################# 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 wlan0 192.168.0.0 0.0.0.0 255.255.255.128 U 1 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0 ##### resolv.conf ####################### nameserver 127.0.1.1 ##### network managers ################## Installed: NetworkManager Running: root 1057 1 0 22:31 ? 00:00:00 NetworkManager ##### NetworkManager info ############### NetworkManager Tool State: connected (global) - Device: eth0 [Wired connection 1] ------------------------------------------- Type: Wired Driver: forcedeth State: connected Default: no HW Address: <MAC 'eth0' [IF]> Capabilities: Carrier Detect: yes Speed: 100 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 192.168.0.100 Prefix: 25 (255.255.255.128) Gateway: 192.168.0.2 DNS: 192.168.0.2 - Device: wlan0 [Tata-Photon-Max-Wi-Fi-4994] ---------------------------------- Type: 802.11 WiFi Driver: rt2800usb State: connected Default: yes HW Address: <MAC 'wlan0' [IF]> Capabilities: Speed: 39 Mb/s Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points (* = current AP) linksys: Infra, <MAC 'linksys' [AC3]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 100 WPA WPA2 *Tata-Photon-Max-Wi-Fi-4994: Infra, <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 53 WPA WPA2 IPv4 Settings: Address: 192.168.1.102 Prefix: 24 (255.255.255.0) Gateway: 192.168.1.1 DNS: 192.168.1.1 ##### NetworkManager.state ############## [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ##### NetworkManager.conf ############### [main] plugins=ifupdown,keyfile,ofono dns=dnsmasq no-auto-default=<MAC 'eth0' [IF]>, [ifupdown] managed=false ##### NetworkManager profiles ########### [[/etc/NetworkManager/system-connections/Tata-Photon-Max-Wi-Fi-4994]] (600 root) [connection] id=Tata-Photon-Max-Wi-Fi-4994 | type=802-11-wireless [802-11-wireless] ssid=Tata-Photon-Max-Wi-Fi-4994 | mac-address=<MAC 'wlan0' [IF]> [ipv4] method=auto [ipv6] method=auto ##### iw reg get ######################## 'iw' is not installed (package "iw"). ##### iwlist channels ################### lo no frequency information. eth0 no frequency information. wlan0 14 channels in total; available frequencies : Channel 01 : 2.412 GHz Channel 02 : 2.417 GHz Channel 03 : 2.422 GHz Channel 04 : 2.427 GHz Channel 05 : 2.432 GHz Channel 06 : 2.437 GHz Channel 07 : 2.442 GHz Channel 08 : 2.447 GHz Channel 09 : 2.452 GHz Channel 10 : 2.457 GHz Channel 11 : 2.462 GHz Channel 12 : 2.467 GHz Channel 13 : 2.472 GHz Channel 14 : 2.484 GHz Current Frequency=2.462 GHz (Channel 11) ##### iwlist scan ####################### lo Interface doesn't support scanning. eth0 Interface doesn't support scanning. Channel occupancy: 1 APs on Frequency:2.412 GHz (Channel 1) 2 APs on Frequency:2.462 GHz (Channel 11) wlan0 Scan completed : Cell 01 - Address: <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> Channel:11 Frequency:2.462 GHz (Channel 11) Quality=49/70 Signal level=-61 dBm Encryption key:on ESSID:"Tata-Photon-Max-Wi-Fi-4994" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Master Extra:tsf=000000075d57040d Extra: Last beacon: 172ms ago IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK Cell 02 - Address: <MAC 'dlink-39D0' [AC2]> Channel:1 Frequency:2.412 GHz (Channel 1) Quality=37/70 Signal level=-73 dBm Encryption key:on ESSID:"dlink-39D0" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 9 Mb/s; 12 Mb/s; 18 Mb/s Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000045f9e8938e Extra: Last beacon: 2884ms ago IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : TKIP CCMP Authentication Suites (1) : PSK Cell 03 - Address: <MAC 'linksys' [AC3]> Channel:11 Frequency:2.462 GHz (Channel 11) Quality=70/70 Signal level=-35 dBm Encryption key:on ESSID:"linksys" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Master Extra:tsf=000000144ac5ea0b Extra: Last beacon: 232ms ago IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK ##### module infos ###################### [rt2800usb] filename: /lib/modules/3.16.0-55-generic/kernel/drivers/net/wireless/rt2x00/rt2800usb.ko license: GPL firmware: rt2870.bin description: Ralink RT2800 USB Wireless LAN driver. version: 2.3.0 author: srcversion: 80C4499E147864C0B13476F depends: rt2x00lib,rt2800lib,rt2x00usb intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 parm: nohwcrypt:Disable hardware encryption. (bool) [rt2x00usb] filename: /lib/modules/3.16.0-55-generic/kernel/drivers/net/wireless/rt2x00/rt2x00usb.ko license: GPL description: rt2x00 usb library version: 2.3.0 author: srcversion: 21417B97E30FD4E6E469E1F depends: rt2x00lib,mac80211 intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 [rt2800lib] filename: /lib/modules/3.16.0-55-generic/kernel/drivers/net/wireless/rt2x00/rt2800lib.ko license: GPL description: Ralink RT2800 library version: 2.3.0 author: Bartlomiej Zolnierkiewicz srcversion: EDDCA794C9E4C3981037918 depends: rt2x00lib,mac80211,crc-ccitt intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 [rt2x00lib] filename: /lib/modules/3.16.0-55-generic/kernel/drivers/net/wireless/rt2x00/rt2x00lib.ko license: GPL description: rt2x00 library version: 2.3.0 author: srcversion: 71EFA3CA86D02D0528C49EE depends: mac80211,cfg80211 intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 [mac80211] filename: /lib/modules/3.16.0-55-generic/kernel/net/mac80211/mac80211.ko license: GPL description: IEEE 802.11 subsystem srcversion: 477882071593B10E01388C8 depends: cfg80211 intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int) parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int) parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int) parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int) parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp) [cfg80211] filename: /lib/modules/3.16.0-55-generic/kernel/net/wireless/cfg80211.ko description: wireless configuration support license: GPL author: Johannes Berg srcversion: 046346857FD53951C911443 depends: intree: Y vermagic: 3.16.0-55-generic SMP mod_unload modversions 686 signer: Magrathea: Glacier signing key sig_key: CE:7D:DF:85:0B:DF:98:9C:CF:49:92:BB:EA:D0:EB:19:6E:A3:49:1D sig_hashalgo: sha512 parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp) parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool) ##### module parameters ################# [rt2800usb] nohwcrypt: N [mac80211] beacon_loss_count: 7 ieee80211_default_rc_algo: minstrel_ht max_nullfunc_tries: 2 max_probe_tries: 5 probe_wait_ms: 500 [cfg80211] cfg80211_disable_40mhz_24ghz: N ieee80211_regdom: 00 ##### /etc/modules ###################### lp ##### modprobe options ################## [/etc/modprobe.d/blacklist-ath_pci.conf] blacklist ath_pci [/etc/modprobe.d/blacklist.conf] blacklist evbug blacklist usbmouse blacklist usbkbd blacklist eepro100 blacklist de4x5 blacklist eth1394 blacklist snd_intel8x0m blacklist snd_aw2 blacklist i2c_i801 blacklist prism54 blacklist bcm43xx blacklist garmin_gps blacklist asus_acpi blacklist snd_pcsp blacklist pcspkr blacklist amd76x_edac [/etc/modprobe.d/blacklist-rare-network.conf] alias net-pf-3 off alias net-pf-6 off alias net-pf-9 off alias net-pf-11 off alias net-pf-12 off alias net-pf-19 off alias net-pf-21 off alias net-pf-36 off [/etc/modprobe.d/iwlwifi.conf] remove iwlwifi \ (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211 [/etc/modprobe.d/libpisock9.conf] blacklist visor [/etc/modprobe.d/mlx4.conf] softdep mlx4_core post: mlx4_en [/etc/modprobe.d/modesetting.conf] options cirrus modeset=1 options mgag200 modeset=1 ##### rc.local ########################## exit 0 ##### pm-utils ########################## ##### udev rules ######################## [/etc/udev/rules.d/70-persistent-net.rules] # PCI device 0x10de:0x03ef (forcedeth) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # USB device 0x:0x (rt2800usb) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0" ##### dmesg ############################# [ 23.974692] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5390, rev 0502 detected [ 24.003062] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 5370 detected [ 32.941352] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin' [ 33.083601] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29 [ 33.313855] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 33.318289] forcedeth 0000:00:07.0 eth0: MSI enabled [ 36.860352] wlan0: authenticate with <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> [ 36.898849] wlan0: send auth to <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (try 1/3) [ 36.900438] wlan0: authenticated [ 36.904047] wlan0: associate with <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (try 1/3) [ 36.907662] wlan0: RX AssocResp from <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (capab=0x411 status=0 aid=3) [ 36.914154] wlan0: associated [ 36.914185] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 39.386661] wlan0: deauthenticating from <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> by local choice (Reason: 2=PREV_AUTH_NOT_VALID) [ 39.429725] wlan0: authenticate with <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> [ 39.448838] wlan0: send auth to <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (try 1/3) [ 39.451964] wlan0: authenticated [ 39.456054] wlan0: associate with <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (try 1/3) [ 39.459305] wlan0: RX AssocResp from <MAC 'Tata-Photon-Max-Wi-Fi-4994' [AC1]> (capab=0x411 status=0 aid=3) [ 39.465794] wlan0: associated ########## wireless info END ############ Under Network Connection -> Wifi Connection Used "Automatic (DHCP) address only" Added 8.8.8.8 as Additonal DNS Servers
nslookup google.com
Server: 127.0.1.1 Address: 127.0.1.1#53 Non-authoritative answer: *** Can't find google.com: No answer sudo nano /etc/resolvconf/resolv.conf.d/tail Added nameserver 8.8.8.8 sudo service network-manager restart
Still doesnt works.
Please note one correction on subject line, should be Lubuntu 14.04 instead of Ubuntu 14.04
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 nameserver 8.8.8.8 3 Answers
Followed the instructions given in the url nameserver 127.0.1.1 in resolv.conf won't go away! and commented dns=dnsmasq in /etc/NetworkManager/NetworkManager.conf and its working now
I had the same problem. Solved by going into System Tools > Network. On the DNS tab I noticed a 172.* server I don't recognize. I replaced it with 8.8.8.8 and everything worked fine.
If you can ping an IP, but can't access a domain, that sounds like a problem with your DNS server. Try nslookup google.com to see if DNS lookup works. If not, try changing your DNS server to 8.8.8.8 (Google's Public DNS).
