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• With dnsmasq as the DNS server, 'dig' and 'ping' succeed while 'nslookup' fails

  - by einpoklum

  I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, if I dig mymachine, I get 192.168.0.1, but if I try to nslookup mymachine, I get: >> connection timed out; no servers could be reached Tried also nslookup mymachine.mynicedomain.org - didn't work either. pinging (Edit:) succeeds. This happens both on the server machine itself and on other machines on the network. How can I the DNS lookups to work? What problem is preventing nslookup from succeeding? Additional Information In the server's /etc/hosts: 192.168.0.1 mymachine In the server's nsswitch.conf: hosts: files mdns4_mininal [NOTFOUND=return] dns mdns4 (admittedly, this is a bit weird; but I also tried: hosts: files dns instead, with the same effect) In resolv.conf (which is generated by dnsmasq): nameserver 127.0.0.1 search mynicedomain.org In the server's /etc/hosts.allow: domain: ALL In the other machines' /etc/resolv.conf (this is set by the DHCP client): nameserver 192.168.0.1 search mynicedomain.org Relevant netstat output on the server: Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN tcp 0 0 192.168.0.1:53 0.0.0.0:* LISTEN Finally, here's the ipconfig output from one of the client machines on the network (running Windows 7): Connection-specific DNS Suffix . : mynicedomain.org Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection Physical Address. . . . . . . . . : 12-34-56-78-9A-BC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.50(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Sunday, October 20th 2013 16:20:25 Lease Expires . . . . . . . . . . : Sunday, October 20th 2013 18:20:24 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Notes: May be related to this question.

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• HDMI video output not working for external monitor

  - by user291852

  I have installed from scratch ubuntu GNOME 14.04 with gnome-flashback on my old HP HDX 16 laptop (core 2 duo p8600 + nvidia GT9600M + 4GB of ram) and I have problems with the HDMI output (I use it to extend my desktop on a dell U2412M 1920x1200 monitor). In the following I summarize the configurations that I have tried: Using the open source nouveau drivers, only the laptop monitor works, no signal from the external monitor connected to the HDMI output. However, the output of the xrandr command show that the HDMI output is connected with the correct resolution 1920x1200 (I find this thing really weird). Nouveau drivers with VGA connection works without problems on the external monitor, but the image is blurry compared to the HDMI connection. Using the nvidia drivers (I have tried different versions: nvidia-331-updates and the xorg-edgers versions nvidia-334 and nvidia-337) the HDMI output works, but I have system instabilities, random crashes and display freezes. I can't even enter in terminal mode with ctrl-alt-f1, so I have to manually shut down the laptop with the power button. I really would like to use the HDMI output with the nouveau drivers to avoid the system instabilities that I experienced with the nvidia drivers, but I can't figure out how to make it works. Alessandro

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• LinkSys router suddenly cannot get an IP address

  - by user43208

  I have a linksys router WRT54G2 connected to a cable broadband. Just last week, everything was working perfectly - I would be able to connect my laptop to the internet using WiFi. However, starting last week, I suddenly lost my internet connection. At first I thought something was wrong with my ISP. However, when I tried connecting the cable directly to my laptop, I found out that there was no problem with the internet connection after all. It appears that it is only my router that cannot get IP address. I have already tried cloning my MAC address and reconfiguring my router using the setup CD, but nothing worked. What could be the problem here? Thank you. Regards, Erwin

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• What is the proper way to install the 3.4 kernel?

  - by Marcelo Ruiz

  Kernel 3.2 has an annoying error for my wireless card (rtl8192se-b) that makes the connection drop and/or prevents the card to make a connection to the wireless router. Dealing with it was very frustrating until I found out the bug was corrected in 3.4. I downloaded: linux-headers-3.4.0-030400_3.4.0-030400.201205210521_all.deb linux-headers-3.4.0-030400_3.4.0-030400.201205210521_all.deb linux-image-3.4.0-030400-generic_3.4.0-030400.201205210521_amd64.deb and installed with: sudo dpkg -i * Now the wireless works fine, but I have two problems that cannot solve. The first one is minor: plymouth would not start at all. But if I boot with the 3.2 kernel it works fine. The second one is serious: sometimes the computer won't shut down or reboot. The X server terminates but the computer shows part of my grub background and will stay there forever using 100% of the CPU. I have a Toshiba Qosmio with an Core i7 and nvidia graphic card (using nvidia-current). During one shutdown, I briefly read a message that said that the virtualbox module couldn't be unloaded from the kernel. I tried to solve this by removing and purging virtualbox and installing it back. I don't see the message anymore, but sometimes the computer won't shutdown nor reboot. Am I missing something to properly configure the new kernels? Thanks!

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• Problems to connect Java visualVM to a EC2-instance

  - by kasten

  I'm trying to profile a AWS EC2 instance via visualVM. The instance is in a securitygroup which allows all connections and i'm runing jstatd with a grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; }; policy on it. When i try to connect from my local machine with visulVM nothing happens. When i use jps i get the following response $ jps -l -m -v rmi://ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com Error communicating with remote host: Connection refused to host: xxx.xxx.xxx.xxx; nested exception is: java.net.ConnectException: Connection timed out But i can ssh into the instance and use jps locally. Has anyone a pointer in which direction i can debug further?

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• Malicious program changing my DNSs

  - by julio.alegria

  Some weeks ago I started having problems with my internet connection, it was extremely slow and suddently some websites (specifically gmail, facebook, youtube and twitter) started failing to connect, while the rest connect normally. Some days after, those same websites started showing me a message in portuguese: "Nova atualização disponível" whenever I tried to connect and a .exe file started downloading ("internet_update.exe" or something like that). That's when I freaked out! It was definitely a virus or something like that, but it was really weird because I never had a problem like that (I run Linux). So I turned on my old PC (running Windows XP) and it turned out it had the same problem! the same message was showed whenever I tried to connect one of those specific websites, while the rest loaded without problems. Even in my Android smarthphone the same message was showed. So it was obvious that the problem was not in a particular machine but in the router itself. So I started googling and I found some information, unfortunately I only found some in spanish, so I will make you a short summary: It is a new banking trojan developed specifically to infect and collect information from Brasilian banks. Apparently now it has expanded to Argentina and Peru. So how does it work? It spreads through social networks (videos, links, ...) and then it "takes control" of your internet connection by changing the values of your DNSs. More specifically, it changes the Primary DNS to one of this IPs: 108.170.13.38, 66.7.216.122 or 63.143.43.154 and the Secondary DNS to 8.8.8.8, this secondary DNS is actually the Google Public DNS, and it is configured this way so that your internet connection continue working properly and the user does not notice anything. The important part here is that because no download or install has been made in your machine, no antivirus will notice any change. After your DNSs have been changed, the trojan controls every single website you connect to and this way they steal your bank information. So after reading about this I accesed to my router and I restored my Primary and Secondary DNSs to their proper values, but one day after I had the same problem again. This is actually a 50% warning post - 50% help me! post. So, here comes the question: Is there any possible way to prevent my DNSs of being changed?

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• Localhost working fine with executing php code except mail function.

  - by Radheshyam Nayak

  i tried executing the mail() and got the following error "Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() " but SMTP and smtp_port are both set in php.ini more ever other codes are working fine with localhost. disabled or/and added exception to firewell no result.... tried telnet localhost 25 error:could not connect to localhost port 25:connection failed..... Thunderbird my mail client says:could not connect to server localhost the connection was refused.... php.ini [mail function] ; For Win32 only. ; http://php.net/smtp SMTP = localhost smtp_port = 25 running mercury mail server in xampp... previously working fine but now not working..

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• How to completely remove a wireless network setup from vista?

  - by 3d1l

  To remove a wireless connection setup I basically go to (network and sharing center) then select (manage wireless network) and then from the list of wireless networks I right click on the one that I want to remove and select (remove network) from the drop down menu. Problem is that when I go to define the wireless network again the system said that the network connection already exist so it seems that even when the wireless network definition is not longer display in the connections list, Vista keeps the configuration somewhere. So How can I be sure that a particular wireless network has been completely removed?

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• Write DAX queries in Report Builder #ssrs #dax #ssas #tabular

  - by Marco Russo (SQLBI)

  If you use Report Builder with Reporting Services, you can use DAX queries even if the editor for Analysis Services provider does not support DAX syntax. In fact, the DMX editor that you can use in Visual Studio editor of Reporting Services (see a previous post on that), is not available in Report Builder. However, as Sagar Salvi commented in this Microsoft Connect entry, you can use the DAX query text in the query of a Dataset by using the OLE DB provider instead of the Analysis Services one. I think it’s a good idea to show the steps required. First, create a DataSet using the OLE DB connection type, and provide the connection string the provider (Provider), the server name (Data Source) and the database name (Initial Catalog), such as: Provider=MSOLAP;Data Source=SERVERNAME\\TABULAR;Initial Catalog=AdventureWorks Tabular Model SQL 2012 Then, create a Dataset using the data source previously defined, select the Text query type, and write the DAX code in the Query pane: You can also use the Query Designer window, that doesn’t provide any particular help in writing the DAX query, but at least can show a preview of the result of the query execution. I hope DAX will get better editors in the future… in the meantime, remember you can use DAX Studio to write and test your DAX queries, and DAX Formatter to improve their readability!If you want to learn the DAX Query Language, I suggest you watching my video Data Analysis Expressions as a Query Language on Project Botticelli!

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• Apt-get saying "Unable to correct problems, you have held broken packages."

  - by YatharthROCK

  TL;DR: sudo apt-get install ... saying "Unable to correct problems, you have held broken packages." The problem I was trying to get the WebApps feature for PP and QQ following this blog post. I ran the sudo add-apt-repository ppa:webapps/preview command to add the repository, but i got a connection error. Since I know my current ISP gives a shaky connection, I tried again and sure enough, it worked. Then I ran sudo apt-get install unity-webapps-preview, but I realized we had to update apt-get first, so I hit Ctrl + C to stop it. Then I ran sudo apt-get update which worked w/o a fuss, but when I ran sudo apt-get install unity-webapps-preview again later, it showed an error message. Here's the dump: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: unity-webapps-preview : Depends: xul-ext-unity but it is not going to be installed Depends: xul-ext-websites-integration but it is not going to be installed Depends: xul-ext-webaccounts but it is not going to be installed E: Unable to correct problems, you have held broken packages. I think this might be because of me interrupting the earlier command. It hadn't got a chance to output anything, though — I stopped it pretty fast. What I tried I have tried running a number of commands:- sudo apt-get install --fix-broken sudo apt-get autoclean sudo apt-get autoremove sudo apt-get -f install sudoapt-get install ppa-purgeandsudo ppa-purge ppa:webapps/preview` Even after running sudo apt-get upgrade after every try, none of them worked. Research I tried searching Google, looking at a couple of forums and searching on AU, but to no avail. Help would be appreciated.

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• Config import on network-manager-openvpn

  - by Toki Tahmid

  I'm trying to use a free service using the OpenVPN protocol using OpenVPN's GUI module in the network manager. The config worked perfectly well as .ovpn on Windows. The behavior in Windows is such that I ran OpenVPN GUI and chose to connect to this particular VPN. It would then show the activity in the attempt to connect and opens a dialog box for username/password authentication. I've successfully imported all the configurations by changing the file type to .conf and using the import feature in network manager. However, attempting to connect would simply display the network manager's attempting to connect animation, but ultimately end with a notification of connection timing out. No prompt asking for authentication would appear at all, nor can I find any feature to prefix the authentication details. client dev tun proto tcp remote miami.proxpn.com 443 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client.crt key client.key cipher BF-CBC keysize 512 comp-lzo verb 4 mute 5 tun-mtu 1500 mssfix 1450 auth-user-pass reneg-sec 0 # If you are connecting through an # HTTP proxy to reach the actual OpenVPN # server, put the proxy server/IP and # port number here. See the man page # if your proxy server requires # authentication. ;http-proxy-retry # retry on connection failures ;http-proxy [proxy server] [proxy port #] Needless to say, but I've downloaded all the required packages for setting up OpenVPN connections. By the way, as you can see above, .key and .crt files location are specified to be in the same directory as the config file. After importing the config file, if were to remove them, would it cause any problem? Note, I haven't removed them, so the problem I'm facing is not due to the absence of these files.

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• help with internet

  - by Remus Rigo

  hi all I have 3 PC's at home (with Win XP, Win 7 & Win 7) and a router. I am always connected to the internet through the router (PPoE connection). My problem is that sometimes when I want to search or open a page, my browser tells me that the server cannot be reached, as if I don't have a connection to the internet. Other times it logs me out from messenger, but browsing still works. FTP download/upload also works. If i disable and enable the LAN then all works fine. Anyone got any idea besides re-installing OS? thanks

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• Access Bind9 DNS in Virtualbox on Host

  - by Philipp Melab

  I've set up a Ubuntu 10.04 Virtual Box with a Bind9 DNS server. The Box has a NAT Network connection for internet access and a host-only adapter for static ip connections from the host (OSX Lion). Thats the only way i managed to get internet and static ip inside the box, guess there is a better one ... The DNS works fine from inside the virtualbox, but not from the host. The http and ftp on the guest system is accessible via both addresses, so connection between host and guest are fine i guess. I tried to add both IP's as name servers. I'm completely new to Bind9 and DNS configuration. Anybody has a hint for me whats wrong? Or how i have to configure the DNS server?

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• Windows 8 Pro Hyper-V guest with no internet

  - by Perplexed

  Trying to get this working on my Windows 8 Pro machine. I created an External Switch Assigned the newly available adapter to a Guest machine with Win 2008 os. My host has internet connection. Host can ping Guest, Guest cannot ping Host. Guest has no internet connection. Pasting the ip of both host and guest. Your help appreciated. HOST ========================== Ethernet adapter vEthernet (EXTSW01): Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2 Physical Address. . . . . . . . . : 9C-B7-0F-0F-D7-D0 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::5434:a9fd:8611:d207%54(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.15(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Saturday, September 8, 2012 12:34:44 PM Lease Expires . . . . . . . . . . : Saturday, September 15, 2012 12:34:44 PM Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DHCPv6 IAID . . . . . . . . . . . : 916240141 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DC-C9-2C-9C-B7-0D-0D-D7-D0 DNS Servers . . . . . . . . . . . : 64.71.255.999 NetBIOS over Tcpip. . . . . . . . : Enabled GUEST ========================== Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter Physical Address. . . . . . . . . : 00-15-5D-3F-0F-00 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::953f:ec5c:5d84:1b50%11(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.20(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 0.0.0.0 DHCPv6 IAID . . . . . . . . . . . : 234886493 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DD-2F-29-0F-15-5E-00-0F-00 DNS Servers . . . . . . . . . . . : ::1 127.0.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled

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• With dnsmasq as the DNS server, 'dig' succeeds, but 'nslookup' and 'ping' fail

  - by einpoklum

  I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, when I'm on the same machine as the dnsmasq - or any other machine on the server, I can dig mymachine and get 192.168.0.1, but if I try to nslookup mymachine, I get: >> connection timed out; no servers could be reached Tried also nslookup mymachine.mynicedomain.org - didn't work either. pinging fails. How can I the DNS lookups to work? Is the problem with the nsswitch entries? The dnsmasq configuration? Additional Information In the server's /etc/hosts: 192.168.0.1 mymachine In the server's nsswitch.conf: hosts: files mdns4_mininal [NOTFOUND=return] dns mdns4 (admittedly, this is a bit weird) In resolv.conf (which is generated by dnsmasq): nameserver 127.0.0.1 search mynicedomain.org In the server's /etc/hosts.allow: domain: ALL In the other machines' /etc/resolv.conf (this is set by the DHCP client): nameserver 192.168.0.1 search mynicedomain.org Finally, here's the ipconfig output from one of the client machines on the network (running Windows 7): Connection-specific DNS Suffix . : mynicedomain.org Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection Physical Address. . . . . . . . . : 12-34-56-78-9A-BC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.50(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Sunday, October 20th 2013 16:20:25 Lease Expires . . . . . . . . . . : Sunday, October 20th 2013 18:20:24 Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Notes: May be related to this question.

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• Bluetooth mouse Logitech M555b not recognized on a Macbook Pro 8.2

  - by Pierre

  I just bought a Logitech M555b Bluetooth mouse today. My computer (a Macbook Pro 8,2) has a bluetooth connection, and it works perfectly fine on Mac OSX (I set up a new device, click the connect button on the mouse, and voilà, done in 5 seconds). I cannot get it to work on Ubuntu 12.04. When I follow the same steps as on Mac OSX under Ubuntu 12.04, Sometimes I will see the mouse name appearing for 1 second on the screen, and if I'm fast enough to click on "Continue", I will have a message telling me the pairing with my mouse failed. Here are the steps I follow: Turn off Bluetooth on Ubuntu Turn Bluetooth on. Bluetooth icon Set up new device... Turn on the mouse, and press the Connect button. Press "Continue" on the Bluetooth New Device Setup screen I see the mouse name for one second, but then it disappear. Click on PIN options... to select '0000'. ... nothing, Ubuntu won't see anything. In the /var/log/syslog, I have the following information: May 27 23:26:16 Trane bluetoothd[896]: HCI dev 0 down May 27 23:26:16 Trane bluetoothd[896]: Adapter /org/bluez/896/hci0 has been disabled May 27 23:26:58 Trane bluetoothd[896]: HCI dev 0 up May 27 23:26:58 Trane bluetoothd[896]: Adapter /org/bluez/896/hci0 has been enabled May 27 23:26:58 Trane bluetoothd[896]: Inquiry Cancel Failed with status 0x12 May 27 23:28:26 Trane bluetoothd[896]: Refusing input device connect: No such file or directory (2) May 27 23:28:26 Trane bluetoothd[896]: Refusing connection from 00:1F:20:24:15:3D: setup in progress May 27 23:28:26 Trane bluetoothd[896]: Discovery session 0x7f3409ab5b70 with :1.84 activated I tried for an hour, I restarted my computer, re-paired the mouse on Mac OSX, etc. Sometimes when I restart the computer, I have a dialog box showing up saying that the mouse M555b wants to access some resources or something, if I click "Grant", or even if I tick "always grant access", nothing happens... How can I get the Bluetooth to work properly? Help!

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• Can I set up a 2nd home wireless router, with router2 connecting to the internet through a desktop which is wirelessly connected to router1?

  - by gil b.

  Hi, I apologize for the crudeness of my MSPaint drawing, but please view my diagram of what I'd like to accomplish: Proposed home network architecture Currently, all devices are connected to 1 wireless router. I would like to make my own subnet, with a box in-between my subnet and the shared wireless router, so that I can learn about IDS, traffic analysis, etc. I was also given a cisco PIX firewall to play around with, and it'd be an added bonus if I could incorporate that into my network. The reason for this proposed architecture is so that I can monitor all MY traffic, without seeing anything going on with my roommates' traffic. my MAIN Question is, is it possible to have my desktop connect to the wireless router with internet via wireless card AND share that connection via the ethernet card, hooked to wireless router 2? cable modem - wireless router - desktop pc connected wirelessly - wireless router 2 getting internet from wired connection to desktop pc - laptops connected wirelessly The PIX can be left out for now, but I'm wondering if it could eventually be incorporated? THANKS!

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• Replicate GAE Datastore On A Server LAN in Java

  - by Franz Noel

  There may be instances wherein one Company Client may not have internet connection on their vicinity. Either their Internet Service Provider currently experience a down time or there are some other problems involving the network, but not their LAN. GAE seems to be needing a connection at all times in the internet. I only need GAE Datastore. I'm thinking about a different application. Creating a Java Swing Client, for instance, and connecting to the Office Server via HRD of GAE Datastore. When I tried to check on the solutions for Java, it does not say anything about uploading all data and I do not need the App. I just need the GAE Datastore. In Java GAE, only indexes can be able to be manipulated. So, is there any tricks/ideas that you can use HRD with GAE Datastore on Java with an Internal Office Server combined? This way, it may provide service even during network down times. (Can somebody create me a tag of gae-datastore, please.)

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• Virtual Hosting in RHEL 5

  - by Kumar P

  We have a RHEL 5 Linux server with a few Windows XP clients. We provide web development in PHP. Now my developers as for common local PHP server for keep their projects in same place. Currently the proxy server and Samba sharing are running on the RHEL 5 server. I installed httpd, PHP and MySQL in the server. And I would like to configure virtual hosting too for LAN. What I want do for it? We have 2 Ethernet ports in the server, 1 for local connections and another one for Internet. Internet is provided by an ADSL provider. (192.168.0.0 series for ADSL modem connection and 10.1.1.0 for the LAN connection. If I want to use virtual hosting, do I need to setup local DNS server? My requirements are: setup PHP with MySQL server for local clients with multiple hosting, without disturbing proxy and Samba.

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• No Telnet login prompt when used over SSH tunnel

  - by SCO

  Hi there ! I have a device, let's call it d1, runnning a lightweight Linux. This device is NATed by my internet box/router, hence not reachable from the Internet. That device runs a telnet daemon on it, and only has root as user (no pwd). Its ip address is 192.168.0.126 on the private network. From the private network (let's say 192.168.0.x), I can do: telnet 192.168.0.126 Where 192.168.0.126 is the IP address in the private network. This works correctly. However, to allow administration, I'd need to access that device from outside of that private network. Hence, I created an SSH tunnel like this on d1 : ssh -R 4455:localhost:23 ussh@s1 s1 is a server somewhere in the private network (but this is for testing purposes only, it will endup somewhere in the Internet), running a standard Linux distro and on which I created a user called 'ussh'. s1 IP address is 192.168.0.48. When I 'telnet' with the following, let's say from c1, 192.168.0.19 : telnet -l root s1 4455 I get : Trying 192.168.0.48... Connected to 192.168.0.48. Escape character is '^]'. Connection closed by foreign host . The connection is closed after roughly 30 seconds, and I didn't log. I tried without the -l switch, without any success. I tried to 'telnet' with IP addresses instead of names to avoid reverse DNS issues (although I added to d1 /etc/hosts a line refering to s1 IP/name, just in case), no success. I tried on another port than 4455, no success. I gathered Wireshark logs from s1. I can see : s1 sends SSH data to c1, c1 ACK s1 performs an AAAA DNS request for c1, gets only the Authoritave nameservers. s1 performs an A DNS request, then gets c1's IP address s1 sends a SYN packet to c1, c1 replies with a RST/ACK s1 sends a SYN to c1, C1 RST/ACK (?) After 0.8 seconds, c1 sends a SYN to s1, s1 SYN/ACK and then c1 ACK s1 sends SSH content to d1, d1 sends an ACK back to s1 s1 retries AAAA and A DNS requests After 5 seconds, s1 retries a SYN to c1, once again it is RST/ACKed by c1. This is repeated 3 more times. The last five packets : d1 sends SSH content to s1, s1 sends ACK and FIN/ACK to c1, c1 replies with FIN/ACK, s1 sends ACK to c1. The connection seems to be closed by the telnet daemon after 22 seconds. AFAIK, there is no way to decode the SSH stream, so I'm really stuck here ... Any ideas ? Thank you !

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• TIME column in TOP command for mysql

  - by michael

  When I run top on my database server I get that mysqld has been running for 4:00.51 and it continues to go up. I assume this means that one process with mysql has been running this long from other posts on here. Its not set to cumulative mode as best I can tell as the heading looks like it would change to CTIME if that be the case. What I'm wondering is if this is normal for a site that makes a lot of individual connections using PHP. I shouldn't have any long running processes that would hold on to a mysql connection for this long, only seconds at most. Am I incorrect to assume that this time relates to one connection/process running? I think usually I see it flash up and away on the TOP, not just stay there with this number increasing.

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• Unknown protocol when trying to connect to remote host with stunnel

  - by RaYell

  I'm trying to set up a stunnel for WebDav on Windows. I want to connect 80 port on my local interface to 443 on another machine in my network. I can ping the machine remote machine. However when I use the tunnel, I'm getting this error all the time SSL state (accept): before/accept initialization SSL_accept: 140760FC: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol There is nothing in the logs on the other machine and here's my stunnel connection config [https] accept = 127.0.0.2:80 connect = 10.0.0.60:443 verify = 0 I've set it up to accept all certificates so this shouldn't be a problem with a self-signed certificate remote host uses. Does anyone knows what might be the problem that this connection cannot be eastablished?

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• Wifi not working on Acer Aspire One D270

  - by Dani

  brand new baby linux user here, never used Ubuntu or any other linux OS before, so be gentle and use short words! I installed Ubuntu 12.04 on my new Acer Aspire One D270-F61C/KF netbook (it's a Japanese computer which had Japanese windows preinstalled, and I decided to take the plunge and try Ubuntu because English Windows costs the earth and stars). Wifi isn't working; I enter my wireless password, it tries to connect for a while, then asks for my password again. And KEEPS ASKING, every few minutes. Wired connection works fine. Wireless card is a Broadcom BCM4313; I have the "additional drivers" checked and installed (I tried unchecking and then reinstalling them in case that would help, no joy, and now my home wifi connection isn't showing up in the list of available connections, argh). I've done a lot of googling and I gather there's a lot of issues with Broadcom cards, but some of the answers are for earlier ubuntu builds and many of them are a bit confusing for a new user. I gather I need to try installing some new drivers other than the proprietary ones provided, but I'm having trouble figuring out how that's done. Anyone got some simple, step by step instructions for me? Please bear in mind, TOTAL N00B. (EDIT): OKAY, got it fixed finally; after suggestions on the Ubuntu forums and messing around with drivers, what finally worked was installing Wicd. Not... using Wicd, for some reason, just installing it fixed it. ...I CHOOSE NOT TO QUESTION IT.

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• What ports does Advantage Database Server need?

  - by asherber

  I have an application which uses ADS and I am attempting to deploy it in a Windows network environment with a rather restrictive firewall. I am having a problem configuring firewall ports appropriately. ADS lives on \\server, and it's listening on port 1234. When \\client tries to connect to \\server\tables, I get Error 6420 (Discovery process failed). When \client tries to connect to \\server:1234\tables, I get error 6097, bad IP address specified in the connection path. \\server is pingable from \\client, and I can telnet to \server:1234. If I try to connect from a client machine inside the firewall, either connection path works fine. It seems there must be something else I need to open in the firewall. Any ideas? Thanks, Aaron. Edit: I should have specified that the firewall is open to \\server:1234 specifically for TCP traffic. Is UDP involved here in some way?

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• apache is up but does not read requests

  - by bosh

  This usually happens a few minutes after restarting apache: httpd daemons are up, but are not reading the requests from the sockets. The web clients just wait forever on the connection. When I run netstat, the Recv-Qs are showing a positive byte count which does not change. So basically the connection between the client and apache is in the CONNECTED state but no progress is made. Restarting apache solves the problem for a couple of minutes, but then it's deja vu all over again. Other servers (sshd, ftpd, etc) are fine. Where should I look further? Any clue? Thanks!

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