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• Forward traffic bound for a certain port over a different interface

  - by Crankyadmin

  Hi, My ISP throttles certain types of traffic. To get round this issue I thought about getting myself a VPN connection. Is it possible with the IPTABLES to forward all traffic outbound on port 119 (for example) to my vpn interface pptp0? Thanks

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• What is "Disable class based route addition" good for?

  - by JRoppert

  In the advanced TCP/IP settings of a VPN connection, i found a checkbox labeled with "Disable class based route addition". The checkbox is only enabled as long as "Use default gateway on remote network" is switched off. What is "Disable class based route addition" good for? Detailed instructions to find the settings: Open Properties of VPN connection Go to Networking tab Open Properties of "Internet Protocol Version 4 (TCP/IPv4)" (and/or TCP/IPv6) Click "Advanced..." Button Change to "IP Settings" tab Here you can find the checkboxes mentioned above

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• Connect to multiple VPNs?

  - by Joe Lyga

  I need a way to connect to multiple VPNs. It's to access camera systems and resources that are on different networks as a client. One VPN could be a company network, and another a city network. Is there a straightforward way to do this? I've experimented with setting up multiple virtual machines in virtualbox already, and I'd like to avoid having to have a full OS installation for every VPN I want to connect to.

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• Wireless internet is connected to an open network but has no internet

  - by Joshua Reeder

  I just installed Ubuntu on my laptop yesterday and it connected to the wireless fine. Then I took it to school, put it on their wired connection, downloaded some stuff, and now the wireless doesn't work. At first it would detect networks, but not connect. I restarted it and now it can connect, but it acts like it doesn't have internet in the browser. Wired connection still works fine on it. I know it isn't the network because my ipad is working on the wireless connection fine. I found another solution on here switching the security settings for the wireless, but this is the apartment's wireless so they have it open, and I won't be able to mess with it at all. Here is lspci output: 00:00.0 Host bridge: Intel Corporation Core Processor DMI (rev 11) 00:03.0 PCI bridge: Intel Corporation Core Processor PCI Express Root Port 1 (rev 11) 00:08.0 System peripheral: Intel Corporation Core Processor System Management Registers (rev 11) 00:08.1 System peripheral: Intel Corporation Core Processor Semaphore and Scratchpad Registers (rev 11) 00:08.2 System peripheral: Intel Corporation Core Processor System Control and Status Registers (rev 11) 00:08.3 System peripheral: Intel Corporation Core Processor Miscellaneous Registers (rev 11) 00:10.0 System peripheral: Intel Corporation Core Processor QPI Link (rev 11) 00:10.1 System peripheral: Intel Corporation Core Processor QPI Routing and Protocol Registers (rev 11) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05) 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 05) 00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 05) 00:1c.3 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 4 (rev 05) 00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 05) 00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 310M] (rev a2) 01:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05) 07:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10) 16:00.0 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 20) 16:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 20) 16:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 20) 16:00.4 System peripheral: JMicron Technology Corp. xD Host Controller (rev 20) ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-Core Registers (rev 04) ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 04) ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 04) ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 04) ff:03.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller (rev 04) ff:03.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Target Address Decoder (rev 04) ff:03.4 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Test Registers (rev 04) ff:04.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Control Registers (rev 04) ff:04.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Address Registers (rev 04) ff:04.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Rank Registers (rev 04) ff:04.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 0 Thermal Control Registers (rev 04) ff:05.0 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Control Registers (rev 04) ff:05.1 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Address Registers (rev 04) ff:05.2 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Rank Registers (rev 04) ff:05.3 Host bridge: Intel Corporation Core Processor Integrated Memory Controller Channel 1 Thermal Control Registers (rev 04) Update: I re-installed Ubuntu 12.04 (I assumed I messed something up while toying with it) but it did not solve the problem. Eventually, I got it to work with my school's wireless internet (the default network settings were wrong), but the internet still doesn't work on my apartment's wifi (it has no security on it).

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• Connection to openVPN Access Server

  - by Beig

  we are using an openVPN Access Server and I would like to connect to it via the VPN network setting (network-manager-openvpn). I downloaded the client.ovpn and I can connect to the server via the command line: openvpn --script-security 2 --config client.ovpn How can I add the connection to the network manager? Which (key) entry is which? User Cert, CA Cert, Private Key? Here is an example of the client.ovpn http://nopaste.info/c10ec207f2.html Thanks in advance.

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• Unable to aquire image through ImageIO.read(url) because of connection timed out.

  - by Jake Frederix

  Following code always fails URL url = new URL("http://userserve-ak.last.fm/serve/126/8636005.jpg"); Image img = ImageIO.read(url); System.out.println(img); I've manually checked the url, and it is valid, and contains a valid jpg image. The problem I get is; Exception in thread "main" javax.imageio.IIOException: Can't get input stream from URL! at javax.imageio.ImageIO.read(ImageIO.java:1385) at maestro.Main2.main(Main2.java:25) Caused by: java.net.ConnectException: Connection timed out at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163) at java.net.Socket.connect(Socket.java:546) at java.net.Socket.connect(Socket.java:495) at sun.net.NetworkClient.doConnect(NetworkClient.java:174) at sun.net.www.http.HttpClient.openServer(HttpClient.java:409) at sun.net.www.http.HttpClient.openServer(HttpClient.java:530) at sun.net.www.http.HttpClient.(HttpClient.java:240) at sun.net.www.http.HttpClient.New(HttpClient.java:321) at sun.net.www.http.HttpClient.New(HttpClient.java:338) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:814) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:755) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:680) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1005) at java.net.URL.openStream(URL.java:1029) at javax.imageio.ImageIO.read(ImageIO.java:1383) ... 1 more Java Result: 1 What does this mean? Funny thing is, if I change my internet-connection to that of the neighbour's wireless, it suddenly does work.

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• How do I execute queries upon DB connection in Rails?

  - by sycobuny

  I have certain initializing functions that I use to set up audit logging on the DB server side (ie, not rails) in PostgreSQL. At least one has to be issued (setting the current user) before inserting data into or updating any of the audited tables, or else the whole query will fail spectacularly. I can easily call these every time before running any save operation in the code, but DRY makes me think I should have the code repeated in as few places as possible, particularly since this diverges greatly from the ideal of database agnosticism. Currently I'm attempting to override ActiveRecord::Base.establish_connection in an initializer to set it up so that the queries are run as soon as I connect automatically, but it doesn't behave as I expect it to. Here is the code in the initializer: class ActiveRecord::Base # extend the class methods, not the instance methods class << self alias :old_establish_connection :establish_connection # hide the default def establish_connection(*args) ret = old_establish_connection(*args) # call the default # set up necessary session variables for audit logging # call these after calling default, to make sure conn is established 1st db = self.class.connection db.execute("SELECT SV.set('current_user', 'test@localhost')") db.execute("SELECT SV.set('audit_notes', NULL)") # end "empty variable" err ret # return the default's original value end end end puts "Loaded custom establish_connection into ActiveRecord::Base" sycobuny:~/rails$ ruby script/server = Booting WEBrick = Rails 2.3.5 application starting on http://0.0.0.0:3000 Loaded custom establish_connection into ActiveRecord::Base This doesn't give me any errors, and unfortunately I can't check what the method looks like internally (I was using ActiveRecord::Base.method(:establish_connection), but apparently that creates a new Method object each time it's called, which is seemingly worthless cause I can't check object_id for any worthwhile information and I also can't reverse the compilation). However, the code never seems to get called, because any attempt to run a save or an update on a database object fails as I predicted earlier. If this isn't a proper way to execute code immediately on connection to the database, then what is?

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• SSH problems (ssh_exchange_identification: read: Connection reset by peer)

  - by kSiR

  I was running 11.10 and decided to do the full upgrade and come up to 12.04 after the update SSH (not SSHD) is now misbehaving when attempting to connect to other OpenSSH instances. I say OpenSSH as I am running a DropBear sshd on my router and I am able to connect to it. When attempting to connect to an OpenSSH server risk@skynet:~/.ssh$ ssh -vvv risk@someserver OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 debug1: Reading configuration data /home/risk/.ssh/config debug3: key names ok: [[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss] debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to someserver [someserver] port 22. debug1: Connection established. debug1: identity file /home/risk/.ssh/id_rsa type -1 debug1: identity file /home/risk/.ssh/id_rsa-cert type -1 debug1: identity file /home/risk/.ssh/id_dsa type -1 debug1: identity file /home/risk/.ssh/id_dsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/risk/.ssh/id_ecdsa" as a RSA1 public key debug1: identity file /home/risk/.ssh/id_ecdsa type 3 debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-521 debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-521 debug1: identity file /home/risk/.ssh/id_ecdsa-cert type -1 ssh_exchange_identification: read: Connection reset by peer risk@skynet:~/.ssh$ DropBear instance risk@skynet:~/.ssh$ ssh -vvv root@darkness OpenSSH_5.9p1 Debian-5ubuntu1, OpenSSL 1.0.1 14 Mar 2012 debug1: Reading configuration data /home/risk/.ssh/config debug3: key names ok: [[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss] debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to darkness [192.168.1.1] port 22. debug1: Connection established. debug1: identity file /home/risk/.ssh/id_rsa type -1 debug1: identity file /home/risk/.ssh/id_rsa-cert type -1 debug1: identity file /home/risk/.ssh/id_dsa type -1 debug1: identity file /home/risk/.ssh/id_dsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/risk/.ssh/id_ecdsa" as a RSA1 public key debug1: identity file /home/risk/.ssh/id_ecdsa type 3 debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-521 debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-521 debug1: identity file /home/risk/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version dropbear_0.52 debug1: no match: dropbear_0.52 ... I have googled and ran most ALL fixes recommend both from the Debian and Arch sides and none of them seem to resolve my issue. Any ideas?

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• MySQL 5.5 - Lost connection to MySQL server during query

  - by bully

  I have an Ubuntu 12.04 LTS server running at a german hoster (virtualized system). # uname -a Linux ... 3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:25:57 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I want to migrate a Web CMS system, called Contao. It's not my first migration, but my first migration having connection issues with mysql. Migration went successfully, I have the same Contao version running (it's more or less just copy / paste). For the database behind, I did: apt-get install mysql-server phpmyadmin I set a root password and added a user for the CMS which has enough rights on its own database (and only its database) for doing the stuff it has to do. Data import via phpmyadmin worked just fine. I can access the backend of the CMS (which needs to deal with the database already). If I try to access the frontend now, I get the following error: Fatal error: Uncaught exception Exception with message Query error: Lost connection to MySQL server during query (<query statement here, nothing special, just a select>) thrown in /var/www/system/libraries/Database.php on line 686 (Keep in mind: I can access mysql with phpmyadmin and through the backend, working like a charme, it's just the frontend call causing errors). If I spam F5 in my browser I can sometimes even kill the mysql deamon. If I run # mysqld --log-warnings=2 I get this: ... 120921 7:57:31 [Note] mysqld: ready for connections. Version: '5.5.24-0ubuntu0.12.04.1' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu) 05:57:37 UTC - mysqld got signal 4 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=16777216 read_buffer_size=131072 max_used_connections=1 max_threads=151 thread_count=1 connection_count=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 346679 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x7f1485db3b20 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 7f1480041e60 thread_stack 0x30000 mysqld(my_print_stacktrace+0x29)[0x7f1483b96459] mysqld(handle_fatal_signal+0x483)[0x7f1483a5c1d3] /lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f1482797cb0] /lib/x86_64-linux-gnu/libm.so.6(+0x42e11)[0x7f14821cae11] mysqld(_ZN10SQL_SELECT17test_quick_selectEP3THD6BitmapILj64EEyyb+0x1368)[0x7f1483b26cb8] mysqld(+0x33116a)[0x7f148397916a] mysqld(_ZN4JOIN8optimizeEv+0x558)[0x7f148397d3e8] mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0xdd)[0x7f148397fd7d] mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x17c)[0x7f1483985d2c] mysqld(+0x2f4524)[0x7f148393c524] mysqld(_Z21mysql_execute_commandP3THD+0x293e)[0x7f14839451de] mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x10f)[0x7f1483948bef] mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1365)[0x7f148394a025] mysqld(_Z24do_handle_one_connectionP3THD+0x1bd)[0x7f14839ec7cd] mysqld(handle_one_connection+0x50)[0x7f14839ec830] /lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f148278fe9a] /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f1481eba4bd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (7f1464004b60): is an invalid pointer Connection ID (thread ID): 1 Status: NOT_KILLED From /var/log/syslog: Sep 21 07:17:01 s16477249 CRON[23855]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) Sep 21 07:18:51 s16477249 kernel: [231923.349159] type=1400 audit(1348204731.333:70): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=23946 comm="apparmor_parser" Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[23990]: Upgrading MySQL tables if necessary. Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[23993]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[23993]: Looking for 'mysql' as: /usr/bin/mysql Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[23993]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[23993]: This installation of MySQL is already upgraded to 5.5.24, use --force if you still need to run mysql_upgrade Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[24004]: Checking for insecure root accounts. Sep 21 07:18:53 s16477249 /etc/mysql/debian-start[24009]: Triggering myisam-recover for all MyISAM tables I'm using MyISAM tables all over, nothing with InnoDB there. Starting / stopping mysql is done via sudo service mysql start sudo service mysql stop After using google a little bit, I experimented a little bit with timeouts, correct socket path in the /etc/mysql/my.cnf file, but nothing helped. There are some old (from 2008) Gentoo bugs, where re-compiling just solved the problem. I already re-installed mysql via: sudo apt-get remove mysql-server mysql-common sudo apt-get autoremove sudo apt-get install mysql-server without any results. This is the first time I'm running into this problem, and I'm not very experienced with this kind of mysql 'administration'. So mainly, I want to know if anyone of you could help me out please :) Is it a mysql bug? Is something broken in the Ubuntu repositories? Is this one of those misterious 'use-tcp-connection-instead-of-socket-stuff-because-there-are-problems-on-virtualized-machines-with-sockets'-problem? Or am I completly on the wrong way and I just miss-configured something? Remember, phpmyadmin and access to the backend (which uses the database, too) is just fine. Maybe something with Apache? What can I do? Any help is appreciated, so thanks in advance :)

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• Python PyBluez loses Bluetooth connection after a while

  - by Travis G.

  I am using Python to write a simple serial Bluetooth script that sends information about my computer stats periodically. The receiving device is a Sparkfun BlueSmirf Silver. The problem is that, after the script runs for a few minutes, it stops sending packets to the receiver and fails with the error: (11, 'Resource temporarily unavailable') Noticing that this inevitably happens, I added some code to automatically try to reopen the connection. However, then I get: Could not connect: (16, 'Device or resource busy') Am I doing something wrong with the connection? Do I need to occasionally reopen the socket? I'm not sure how to recover from this type of error. I understand that sometimes the port will be busy and a write operation is deferred to avoid blocking other processes, but I wouldn't expect the connection to fail so regularly. Any thoughts? Here is the script: import psutil import serial import string import time import bluetooth sampleTime = 1 numSamples = 5 lastTemp = 0 TEMP_CHAR = 't' USAGE_CHAR = 'u' SENSOR_NAME = 'TC0D' #gauges = serial.Serial() #gauges.port = '/dev/rfcomm0' #gauges.baudrate = 9600 #gauges.parity = 'N' #gauges.writeTimeout = 0 #gauges.open() filename = '/sys/bus/platform/devices/applesmc.768/temp2_input' def parseSensorsOutputLinux(output): return int(round(float(output) / 1000)) def connect(): while(True): try: gaugeSocket = bluetooth.BluetoothSocket(bluetooth.RFCOMM) gaugeSocket.connect(('00:06:66:42:22:96', 1)) break; except bluetooth.btcommon.BluetoothError as error: print "Could not connect: ", error, "; Retrying in 5s..." time.sleep(5) return gaugeSocket; gaugeSocket = connect() while(1): usage = psutil.cpu_percent(interval=sampleTime) sensorFile = open(filename) temp = parseSensorsOutputLinux(sensorFile.read()) try: #gauges.write(USAGE_CHAR) gaugeSocket.send(USAGE_CHAR) #gauges.write(chr(int(usage))) #write the first byte gaugeSocket.send(chr(int(usage))) #print("Wrote usage: " + str(int(usage))) #gauges.write(TEMP_CHAR) gaugeSocket.send(TEMP_CHAR) #gauges.write(chr(temp)) gaugeSocket.send(chr(temp)) #print("Wrote temp: " + str(temp)) except bluetooth.btcommon.BluetoothError as error: print "Caught BluetoothError: ", error time.sleep(5) gaugeSocket = connect() pass gaugeSocket.close() EDIT: I should add that this code connects fine after I power-cycle the receiver and start the script. However, it fails after the first exception until I restart the receiver. P.S. This is related to my recent question, Why is /dev/rfcomm0 giving PySerial problems?, but that was more about PySerial specifically with rfcomm0. Here I am asking about general rfcomm etiquette.

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• Making a bash script that reconnect to AP when connection lost

  - by Alexander

  I'm facing problems with WIFI on ubuntu i tried to update the system but still the same what happens is that i suddenly lose the connection with my router and when i press on the WIFI bar the system won't detect any APs i have to uncheck "enable WIFI" option ,then re check it so it work,it automatically reconnect. I'm thinking of making a bash script that detects when the pc is disconnected from the router for any reason, and when it is disconnected it disable then enable the wifi. i mean like automating resetting the connection that possible ? i guess i must use this nmcli nm wifi off nmcli nm wifi on but how can i make the script know if the PC is disconnected from the WIFI ?

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• I just moved, have no internet on my laptop or ipod, but everyone else who lives here does

  - by Kay

  I just moved to Thunder Bay and my laptop as well as my ipod cannot connect to the internet. My laptop allows me to write the password for the wifi, but I still have no internet connection. When I try to use the cable, the computer tells me I have a perfect connection, even the icon shows that it's working, but I can't open any web pages or use any internet functions. When I try to use MSN it sends me to a troubleshooting option and informs me that there's some kind of problem with the "gateway". I have unplugged the modem and the router and plugged them back in, this did not help. I am living in a home where all the people are using wifi on the same system as me, and no one has ever had any problems. Back home both my laptop and my ipod worked without a problem both in my home, as well as on campus. Since this problem seems to be limited only to me, it would indicate that there's a problem on my end -- with my laptop. However, in that case my ipod would be working. It has never failed to connect before. Any suggestions would be much appreciated.

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• Offline MySQL installation (Using deb file and no internet connection)

  - by Muhammad Gelbana

  I downloaded MySQL's installation package and ran the following command after installing a fresh Ubuntu server. dpkg -i mysql-5.5.28-debian6.0-x86_64.deb It installed fine and then I tried starting up the server manually /opt/mysql/server-5.5/bin/mysqld And the following error came up /opt/mysql/server-5.5/bin/mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory How can I install that library in an offline way ? I have no means whatsoever to an internet connection from that server and I can't even relocate it to have internet connection temporarily ! Thank you.

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• ubuntu 13.04 recognizes usb mobile broadband modem as ethernet connection

  - by Bence Mihalka

  When I plug in my usb mobile broadband modem (ZTE MF-667), in the network manager instead of a mobile broadband connection, I get an ethernet connection, called: Ethernet Network (ZTE WCDMA Technologies MSM), which of course doesn't work. Here is my lsusb output and the relevant parts of dmesg output: lsusb: Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth Bus 001 Device 004: ID 04f2:b1b9 Chicony Electronics Co., Ltd Asus Integrated Webcam Bus 001 Device 005: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader Bus 002 Device 004: ID 19d2:1405 ZTE WCDMA Technologies MSM dmesg: [ 195.328467] usb 2-1.1: new high-speed USB device number 3 using ehci-pci [ 195.423545] usb 2-1.1: New USB device found, idVendor=19d2, idProduct=1225 [ 195.423555] usb 2-1.1: New USB device strings: Mfr=3, Product=2, SerialNumber=4 [ 195.423561] usb 2-1.1: Product: ZTE WCDMA Technologies MSM [ 195.423567] usb 2-1.1: Manufacturer: ZTE,Incorporated [ 195.423572] usb 2-1.1: SerialNumber: P680A1ZTED000000 [ 195.426319] scsi7 : usb-storage 2-1.1:1.0 [ 196.425354] scsi 7:0:0:0: CD-ROM CWID USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2 [ 197.447919] usb 2-1.1: USB disconnect, device number 3 [ 197.457582] sr0: scsi3-mmc drive: 243x/186x xa/form2 cdda pop-up [ 197.457594] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 197.459058] sr 7:0:0:0: Attached scsi CD-ROM sr0 [ 197.459483] sr 7:0:0:0: Attached scsi generic sg2 type 5 [ 197.759186] usb 2-1.1: new high-speed USB device number 4 using ehci-pci [ 197.854543] usb 2-1.1: New USB device found, idVendor=19d2, idProduct=1405 [ 197.854556] usb 2-1.1: New USB device strings: Mfr=4, Product=3, SerialNumber=5 [ 197.854564] usb 2-1.1: Product: ZTE WCDMA Technologies MSM [ 197.854572] usb 2-1.1: Manufacturer: ZTE,Incorporated [ 197.854579] usb 2-1.1: SerialNumber: P680A1ZTED010000 [ 197.957739] scsi8 : usb-storage 2-1.1:1.2 [ 198.076554] cdc_ether 2-1.1:1.0 eth1: register 'cdc_ether' at usb-0000:00:1d.0-1.1, CDC Ethernet Device, 00:a0:c6:00:00:00 [ 198.076583] usbcore: registered new interface driver cdc_ether [ 198.955985] scsi 8:0:0:0: CD-ROM CWID USB SCSI CD-ROM 2.31 PQ: 0 ANSI: 2 [ 198.956797] scsi 8:0:0:1: Direct-Access ZTE MMC Storage 2.31 PQ: 0 ANSI: 2 I created the appropriate mobile broadband connection manually, but I cannot enable it in network manager, since the device is not recognized as mobile broadband. Any tips how to make it work?

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• how to connect to server continuously using an bad internet connetion

  - by Nikhil

  I have a bad Internet connection, it disconnects frequently and on reconnect, I'm assigned a different IP address by the ISP. The problem is that I connect to a remote VPS (Ubuntu), and when Internet connection is disrupted n reconnected, I can no longer do anything on the terminal. I have to restart the terminal and re-initiate the connection. Is there a way I can have persistent connection with server.

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• Why is Ubuntu offline (except torrents) while Windows is online?

  - by Fahim al Islam

  I am using a static wired connection. Everything was perfect. But suddenly from few hours back I can't access any website. Dropbox, Ubuntu One also can't connect. Ping request is also unsuccessful, but I can download through torrent. I am not trying torrent download and browsing at the same time. So, I think it's not an issue about torrent using all the bandwidth. One important point is that this connection works perfectly on Windows on this same PC (My PC is dual-boot). I have tried the way what izx has suggested (using "sudo sh -c 'echo nameserver 8.8.8.8 /etc/resolv.conf'"), but I'm facing the same problem again. Now I can't even ping 8.8.8.8 and google.com. Though I can ping 74.125.228.2 (which is Google IP address) I can't understand what's happening and why this is happening. I'm new in this website many rules and regulations is unknown to me. So, please don't be bothered for my mistakes. Looking forward for help from anyone. Thanks to all.

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• Remote connection problem.

  - by Woody

  Hello I have ubuntu 10.04 installed with mysql on it and I have a problem with remote connection. When I connect through putty it works but sometimes it looks like it hangs for example when I execute the command ln --help. Also with MySQL connection When I execute a simple query like show processlist; it works, but for example select * from table not always, if the table doesn't have many rows it works but if it has let's say more than 20 the query looks like it keeps working and never ends. It's connected but I can't do many things remotely. Added: I connect using putty from other windows pc, server is not overloaded. when i work at the same time directly on ubuntu i can do everything. Remotely not.

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• can't ping from virtualbox ubuntu server --nat connection

  - by George

  i set up an ubuntu server in virtual box following these and these instructions.My connection worked,also ssh . Then, i signed up in dyndns.com ,i configured the router ,but in the port forward i changed the 2222 port to 80 because it couldn’t forward from 2222.My port is open and accepting connections but i don’t have any more connection from the server in the virtual box. From virtual box settings-network-port forwarding , i use: Host IP :127.0.0.1 , Host port :80 , Guest Port :22 ,Guest IP : its empty. I am not sure if i am using right the address in /etc/network/interfaces , i use 192.168.0.2 and also this address i use for the firewall rules in the router. Also,in the server /etc/resolv.conf i put that address and in /etc/mysql/my.cnf. I can ping that address but nothing more.(of course neither ssh works) Thank you

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• Upgrading your Internet connection to obselescence

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/11/upgrading-your-internet-connection-to-obselescence.aspxRecently I was approached by two UK Internet Service Providers to upgrade to a fibre connection. In each case I asked two questions:Can you provide me with a fixed IP Address?Is the equipment to be provided compatible with IPv6?None of the question was satisfactorily answered. One of the persons answering even suggested that granting a fixed IP Address would be a breach of security!I find it very disturbing that two companies that present themselves as innovative should still not be preparing for IPv6. The answer I would have expected was that all new equipment being supplied was IPv6 compatible and that plans were in hand for a switchover to IPv6. Instead new equipment would be supplied that would have to be replaced when IPv6 comes. Equally disturbing was that the call center people who answered did not know why a fixed IP address was important or why the change to IPv6 would have to come.I would rather not name and shame the two companies, however I will be looking elsewhere for my next Internet Service Provider.

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• How to prevent WLAN connection from dropping permanently?

  - by Chris

  I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few minutes it drops again. It's connected to a Vodafone 802 box with WLAN N fix set. It seems that it works when I switch off N mode. But I need to test. Can someone confirm this issue or is there another solution? I have another machine with 12.04 (HP 625 laptop) running where connection is stable.

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• Network connection on an Acer Aspire 5253?

  - by fuquam

  Brand new to Ubuntu and PCs for that matter. I've been a Mac user all my life but wanted to try Ubuntu on the cheap so I bought an Acer laptop 5253-BZ893. I got Ubuntu 10.10 installed with no problem. The only problem I have is I have no network connection options, wired or wireless. I just get "No Network Devices Available". The computer came with Windows 7 installed and I'm able to connect to my wireless network fine using Windows so I know the computer works. I've been searching forums and google for hours trying to figure out why I can't get a network connection using Ubuntu but so far no luck. Any suggestions? Thanks in advance.

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• Using Ubuntu with a dial-up connection

  - by Robert Heller

  Is it possible to install Ubuntu on a machine with only a dial-up connection? That is, does the Ubuntu install CD come with everything needed to set up an Internet connection using a dial-up modem (I have a USRobotics Courier V.Everything connected to a RS232 port on a Lava Quattro-PCI). I presently run CentOS (5.9), which does include support for dialup Internet access out-of-the-box (all of the modules for dialup are on the distro DVD). When I ran the UBuntu CD (12.04.1 desktop), there was no sign of dial-up Internet support. Am I faced with a chicken or egg problem?

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• Pppoe wireless connection, Ubuntu 12.4

  - by Barbara

  I recently bought a new computer (Asus 1015 cx) with Ubuntu (12.4) as preinstalled system. My problem is with the internet. The computer connects just fine to the free wifi we have at home, but in college, we have a little bit different system. There is wifi, but it is not free - everyone receives a user name and a password. I cant manage to estabilish this Pppoe connection - the computer "sees" where can it connect, but I dont know where to write my username and password. It is not the DSL connection, what I have already tried. Can you help me?

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• wired connection not being recognised in ubuntu 10.04 lts

  - by arun

  I have windows7 installed on my C drive and ubuntu 10.04 lts on my D drive. When I plud the lan cable (ethernet cable) onto the ethernet card of my laptop, windows7 identifies the network correctly without the need for any manual settings and connects me to the network correctly. Unfortunately, in ubuntu, even after plugging in the cable, nothing happens (on the network side). It is only scanning for wireless networks it seems, and doesnt bother about the wired networks. I tried adding a new wired connection and manually entered the physical address which was displayed when i connected to the network using windows. i entered the phy address, and told it to use auto dhcp and saved the dialog bog in ubuntu network connection. Still there is no change, and ubuntu doesnt seem to recognise anything. please let me know how to work with wired connections using ubuntu, and why my wired cable is not being recognized in ubuntu. thanks. PS: I am pretty new to ubuntu/ linux :)

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• Ethernet Wired Connection Help

  - by user107598

  I have recently installed Ubuntu 12.10 onto my Dell Inspiron N5010 and Ive been all over many forums trying to figure out how I can get my ethernet cable to be recognized so I can set up a wired connection. My Network Card is the Realtek RT8139 and from what Ive gathered the ethernet port driver for it is installed. Whenever I run ifconfig in the terminal it says that eth1 is up and running but no matter how I edit the connection I cannot get it to work. If anyone can help it would be greatly appreciated!

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