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  • Set default system audio output port (for all accounts)

    - by Ludwik Trammer
    The default output audio port Ubuntu doesn't work on my system. It should be "Analog Mono Output/Amplifier", instead of "Analog Output/Amplifier". I can easily change that in sound preferences, just by choosing the right port in the "Output" tab. The problem is this would only apply to a single account, and I would like to change it system-wide, so it applies to all accounts on the system (I have more than 100 users...). I'm after 2 hours of Googling, so any help would be appreciated.

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  • How can I port forward with iptables?

    - by stu
    I want connections coming in on ppp0 on port 8001 to route to 192.168.1.200 on eth0 on port 8080 I've got these two rules -A PREROUTING -p tcp -m tcp --dport 8001 -j DNAT --to-destination 192.168.1.200:8080 -A FORWARD -m state -p tcp -d 192.168.1.200 --dport 8080 --state NEW,ESTABLISHED,RELATED -j ACCEPT and it doesn't work, what am I missing?

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  • Manually closing a port from commandline

    - by codingfreak
    Hi I want to close an open port which is in listening mode between my client and server application. Is there any manual command line option in Linux to close a port ?? NOTE: I came to know that "only the application which owns the connected socket should close it, which will happen when the application terminates." I dont understand why it is only possible by the application which opens it ... But still eager to know if there is any another way to do it ??

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  • XAMPP won't start because I'm already running MySQL on port 3306

    - by JellicleCat
    I'm trying to start XAMPP, but it fails with only the word 'Busy' in the Control Panel console. I ran xampp/install/portcheck.bat to see if the ports were available, and I see that port 3306 is busy (because I'm running MySQL as a service on it). I suppose that XAMPP wants to take over and run MySQL on that port. Can anyone tell me how to get XAMPP to just make use of the existing server and not try to control it itself?

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  • How to open port 25 on the server

    - by liuxingruo
    I'm using centOS. I want to implement a smtp mail server, and I have installed postfix and dovecot(both have been set correctly). I tried to telnet the 25 port, but it returns Unable to connect to remote host: Connection refused So, How can I open the 25 port? Thanks!

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  • port 80 was blocked

    - by Kombuwa
    hi, in my home computer incoming port 80 was blocked. i gess it was done by some vires. did any body know how to open the closed port in xp. or any tool to open colosed ports.

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  • VNC connection through machine with only SSH port open

    - by pufferfish
    I would like to make a VNC connection from home to a Windows machine at work. The Windows machine is not accessible from the outside, but there is a Linux box that does have port 22 open, so it would seem that this can be done. I suspect it's just a command that "forwards" connections to port 22 on the Linux machine to the Windows machine? Just can't find an example that does exactly this though Thanks in advance!

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  • Why does no small Rj45 port exist?

    - by Christian Sauer
    While I bought my last Tablet I noticed that no Tablet (and most smaller notebooks /convertibles) has a Rj45 port. Which I finde quite dissatisfying since I like to use RJ45 in numerous places. I think a reason could be that Rj45 is simply too big for a Tablet - it is downright massive compared to micro USB /HDMI etc. But that leads me to my question: Why is there no attempt to build a smaller micro-Rj45 port which could be used in constrained spaces?

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  • Setting up a subdomain SSL with custom port

    - by Webnet
    I'm setting up a subdomain on a dedicated server that I'm going to use for SVN services. The SVN server is up and running I just need to setup the subdomain. The https has been switched to a custom port because there's a confliction with a port forward pointing to another server. Should I do this through GoDaddy or Apache?

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  • What's the extra FTP port here?

    - by warl0ck
    While downloading a tar ball from gnu's FTP server, I found that other than standard 21 TCP port connection, I also seeing an extra connection: tcp 0 0 192.168.1.109:45056 208.118.235.20:21 ESTABLISHED 10956/wget tcp 0 0 192.168.1.109:56724 208.118.235.20:22259 ESTABLISHED 10956/wget What that port is used for? I checked /etc/services, only 20 and 21 should be in use, am I wrong? The command in use was wget 'ftp://ftp.gnu.org/gnu/tar/tar-1.26.tar.xz'

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  • Remove a port from a VLAN (HP ProCurve)

    - by sixnumber
    I'm not too familiar with switches but I want to remove port 6 from the following 'VLAN 12' I've tried searching for an easy explanation to no avail - How do I do this please? Port Information Mode Unknown VLAN Status ---------------- -------- ------------ ---------- 5 Untagged Learn Up 6 Tagged Learn Up 8 Untagged Learn Up 18 Untagged Learn Down 22 Untagged Learn Up 26 Tagged Learn Up

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  • Sharing a serial port between two processes

    - by peterrus
    As it is not possible to directly share a serial port between two processes using Linux, I am looking for another way to achieve this, I have heard about socat but could not find a concrete example of how to realize the following: Split one physical serial port (/dev/ttyUSB0) into two virtual ports, one for reading and one for writing, as one process only needs to send data, and one only needs to receive data. I can no modify the sending application unfortunately.

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  • Lubuntu 14.04 Problem starting lxsession-default-apps

    - by user278179
    I have one problem, I can't execute lxsession-default-apps on Lubuntu 14.04 because I get because said to me "The database is updating, please wait" If I try to run lxsession-default-apps, I get this error: ** Message: utils.vala:30: config_path_directory: /home/USER/.config/lxsession-default-apps ** Message: desktop-files-backend.vala:171: test config_path: /home/USER/.config/lxsession-default-apps/settings.conf ** Message: desktop-files-backend.vala:237: Scanning folder: /usr/share/applications ** Message: desktop-files-backend.vala:278: Start scanning ** Message: desktop-files-backend.vala:257: Scanning folder: /usr/share/app-install/desktop ** Message: desktop-files-backend.vala:278: Start scanning Error: list_files failed: No such file or directory ** Message: desktop-files-backend.vala:333: Finishing scanning ** Message: desktop-files-backend.vala:189: Signal finish scanning with mode: write ** Message: desktop-files-backend.vala:333: Finishing scanning Any help would be appreciated. Thanks. Regards.

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  • Problems with shutting down JBoss in Eclipse if I change JNDI port

    - by Balint Pato
    1st phase I have a problem shutting down my running JBoss instance under Eclipse since I changed the JNDI port of JBoss. Of course I can shut it down from the console view but not with the stop button (it still searches JNDI port at the default 1099 port). I'm looking forward to any solutions. Thank you! Used environment: JBoss 4.0.2 (using default) Eclipse 3.4.0. (using JBoss Tools 2.1.1.GA) Default ports: 1098, 1099 Changed ports: 11098, 11099 I changed the following part in jbosspath/server/default/conf/jboss-service.xml: <!-- ==================================================================== --> <!-- JNDI --> <!-- ==================================================================== --> <mbean code="org.jboss.naming.NamingService" name="jboss:service=Naming" xmbean-dd="resource:xmdesc/NamingService-xmbean.xml"> <!-- The call by value mode. true if all lookups are unmarshalled using the caller's TCL, false if in VM lookups return the value by reference. --> <attribute name="CallByValue">false</attribute> <!-- The listening port for the bootstrap JNP service. Set this to -1 to run the NamingService without the JNP invoker listening port. --> <attribute name="Port">11099</attribute> <!-- The bootstrap JNP server bind address. This also sets the default RMI service bind address. Empty == all addresses --> <attribute name="BindAddress">${jboss.bind.address}</attribute> <!-- The port of the RMI naming service, 0 == anonymous --> <attribute name="RmiPort">11098</attribute> <!-- The RMI service bind address. Empty == all addresses --> <attribute name="RmiBindAddress">${jboss.bind.address}</attribute> <!-- The thread pool service used to control the bootstrap lookups --> <depends optional-attribute-name="LookupPool" proxy-type="attribute">jboss.system:service=ThreadPool</depends> </mbean> <mbean code="org.jboss.naming.JNDIView" name="jboss:service=JNDIView" xmbean-dd="resource:xmdesc/JNDIView-xmbean.xml"> </mbean> Eclipse setup: About my JBoss Tools preferences: I had a previous version, I got this problem, I read about some bugfix in JbossTools, so updated to 2.1.1.GA. Now the buttons changed, and I've got a new preferences view, but I cannot modify anything...seems to be abnormal as well: Error dialog: The stacktrace: javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused: connect]]] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1385) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:579) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572) at javax.naming.InitialContext.lookup(InitialContext.java:347) at org.jboss.Shutdown.main(Shutdown.java:202) Caused by: javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused: connect]] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:254) at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1370) ... 4 more Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused: connect] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:228) ... 5 more Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) at java.net.Socket.connect(Socket.java:452) at java.net.Socket.connect(Socket.java:402) at java.net.Socket.<init>(Socket.java:309) at java.net.Socket.<init>(Socket.java:211) at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:69) at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:62) at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:224) ... 5 more Exception in thread "main" 2nd phase: After creating a new Server in File/new/other/server, it did appear in the preferences tab. Now the stop button is working (the server receives the shutdown messages without any additional modification of the jndi port -- there is no opportunity for it now) but it still throws an error message, though different, it's without exception stack trace: "Server JBoss 4.0 Server failed to stop."

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  • Issues with ProxyPass and ProxyPassReverse when proxying to localhost and a different TCP port

    - by mbrownnyc
    I am attempting to use ProxyPass and ProxyPassReverse to proxy requests through Apache to another server instance that is bound to the localhost on a different TCP port that the Vhost exists (VHost is bound to :80, when the target is bound to :5000). However, I am repeatedly receiving HTTP 503 when accessing the Location. According to the ProxyPass documentation... <VirtualHost *:80> ServerName apacheserver.domain.local DocumentRoot /var/www/redmine/public ErrorLog logs/redmine_error <Directory /var/www/redmine/public> Allow from all Options -MultiViews Order allow,deny AllowOverride all </Directory> </VirtualHost> PassengerTempDir /tmp/passenger <Location /rhodecode> ProxyPass http://127.0.0.1:5000/rhodecode ProxyPassReverse http://127.0.0.1:5000/rhodecode SetEnvIf X-Url-Scheme https HTTPS=1 </Location> I have tested binding the alternate server to the interface IP address, and the same issue occurs. The server servicing request is an instance of python paste:httpserver, and it has been configured to use the /rhodecode suffix (as I saw this to be mentioned in other posts about ProxyPass). The documentation from the project itself, Rhodecode, reports to use the above. The issue is persistent if I target another server that is serving on a different port. Does ProxyPass allow proxying to a different TCP port? [update] I won't delete this, in case someone comes across the same issue. I had set an ErrorLog, and in that ErrorLog the following error was reported: [Wed Nov 09 11:36:35 2011] [error] (13)Permission denied: proxy: HTTP: attempt to connect to 127.0.0.1:5000 (192.168.100.100) failed [Wed Nov 09 11:36:35 2011] [error] ap_proxy_connect_backend disabling worker for (192.168.100.100) After some more research, I attempted to set SELinux to permissive (echo 0 >/selinux/enforce), and try again. It turns out the SELinux boolean httpd_can_network_connect must be set to 1. For persistence on reboot: setsebool -P httpd_can_network_connect=1

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  • How to work around blocked outbound hkp port for apt keys

    - by kief_morris
    I'm using Ubuntu 9.10, and need to add some apt repositories. Unfortunately, I get messages like this when running sudo apt-get update: W: GPG error: http://ppa.launchpad.net karmic Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A9BF3BB4E5E17B5 W: GPG error: http://ppa.launchpad.net karmic Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1DABDBB4CEC06767 So, I need to install the keys for these repositories. Under 9.10 we now have the option to do this: sudo add-apt-repository ppa:nvidia-vdpau/ppa See this Ubuntu help article for details. This is great, except that I'm running this on a workstation behind a firewall which blocks outbound connections to pretty much all ports except those required by secretaries running Windows and IE. The port in question here is the hkp service, port 11371. There appear to be ways to manually download keys and install them on apt's keyring. There may even be a way to use add-apt-repository or wget or something to download a key from an alternative server making it available on port 80. However, I haven't yet found a concise set of steps for doing so. What I'm looking for is: How to find a public key for an apt-package (recommendations for resources which have these, and/or tips for searching. Searching for the key hash doesn't seem all that effective so far.) How to retrieve a key (can it be done automatically using gpg or add-apt-repository?) How to add a key to apt's keyring Thanks in advance.

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  • ssl port didnt work on nginx

    - by Jin Lin
    I set up the unicorn and nginx on one of my ec2 machine. and my request are loading ok with nginx listen to port 80. but when I enable it to ssl, which listen to port 443. It doesn't work. and it can still work with port 80, https. server { listen 443 ssl; # replace with your domain name server_name domain.com; # replace this with your static Sinatra app files, root + public root /home/ubuntu/domain/public; ssl on; ssl_certificate /etc/ssl/domain.crt; ssl_certificate_key /etc/ssl/domain.key; # maximum accepted body size of client request client_max_body_size 4G; # the server will close connections after this time keepalive_timeout 5; location ~ ^/assets/ { add_header ETag ""; gzip_static on; expires max; add_header Cache-Control public; } location / { proxy_set_header X-Forwarded-Proto https; try_files $uri @app; } location @app { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; # pass to the upstream unicorn server mentioned above proxy_pass http://unicorn_server; } }

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  • lsof not showing what port a proc is listening on

    - by ericslaw
    I have many processes on a box listening on several ports. I am trying to map ports to pids. The problem is that lsof is not telling me what ports belong to which process. Given an apache listening on port 80, I can see it listening via netstat: user@host% netstat -an|grep LISTEN|grep 80 *.80 *.* 0 0 49152 0 LISTEN But when I try to map port 80 to a pid I get nothing: user@host% lsof -iTCP:80 -t When I try seeing what sockets that specific pid is using I get: user@host% lsof -lnP -p31 -a -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME libhttpd. 31 0 15u IPv4 0x6002d970b80 0t0 TCP *:65535 (LISTEN) Notice the *:65535 in the NAME column. Does anyone know why lsof is not reporting the port in use? I am running as root. I am using a mix of lsof and os versions: lsof v4.77 on Solaris10 sparc lsof v4.72 on Redhat4.2 etc I know that linux solutions can use "netstat -p", so I guess I'm only looking for why solaris isn't working, but I find lsof is frequently silent and not showing me expected data.

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  • How to setup port forwarding from my Webserver (apache) to my Database server (mysql)

    - by karman888
    Hello again guys, and thank you for your help so far. Here is my problem: I have two remote dedicated servers, one webserver that runs apache, and one db server that runs mysql. The apache server is visible on the internet of course, but the second server is only visible to the apache server because they are connected with LAN. I need to connect to the remote mysql server through internet from my home-pc , but only apache server is visible to my home-pc. How can i setup port-forwarding from my apache server to the mysql server so i will be able to "see" the mysql server from my home-pc? This question is a follow-up from my first question Connect to remote mysql server from my application. Problem is that Mysql server is on LAN in which you answered me and helped me a lot by telling me to do "port-forwarding". I looked over the internet, and i cant find a good how-to to do port-forwarding. I'm an experienced programmer, but have little experience on hardware and networks. I can understand though what must be done, so i just need a litle help to sort things out :) I hope you can help me guys, Thank you in advance p.s. machine that Apache is running is on CentOS, mysql server also CentOS. p.s2 webserver runs WebHostManager i dont know if that makes any difference or it can be made easily through this, i just mention it :)

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  • Connecting to network device behind NAT from local LAN using the external port and IP

    - by lumbric
    I noticed at several different LANs connected to the Internet through a NAT the following phenomena. There is a server in the LAN and there is a port forwarding to reach this server also from outside the LAN through the NAT. E.g. consider a LAN with the address 192.168.0.* and a SSH server at 192.168.0.2 with port 22 and a forwarding from port 2222 at the NAT 192.168.0.1 to 192.168.0.2:22. If the NAT's external IP is 44.33.22.11, one can connect to the SSH server through 44.33.22.11:2222. Surprisingly this works only from outside the LAN. If one tries to connect to 44.33.22.11:2222 from behind the NAT, there is no answer. Of course one could simply use 192.168.0.2:22, but often it is simpler to use the external IP. The typical use case for me is the configuration on a laptop computer. Usually the user uses any arbitrary Internet connection to connect to his home or office server, but sometimes he will use also the LAN to connect to it and it would be annoying to have to different configurations or bookmarks. Why does it fail to connect from inside the LAN? Is there any good work around?

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  • Port 80 not accessible Amazon ec2

    - by Jasper
    I have started a Amazon EC2 instance (Linux Redhat)... And Apache as well. But when i try: http://MyPublicHostName I get no response. I have ensured that my Security Group allows access to port 80. I can reach port 22 for sure, as i am logged into the instance via ssh. Within the Amazon EC2 Linux Instance when i do: $ wget http://localhost i do get a response. This confirms Apache and port 80 is indeed running fine. Since Amazon starts instances in VPC, do i have to do anything there... Infact i cannot even ping the instance, although i can ssh to it! Any advice? EDIT: Note that i had edited /etc/hosts file earlier to make 389-ds (ldap) installation work. My /etc/hosts file looks like this(IP addresses as shown as w.x.y.z ) 127.0.0.1   localhost.localdomain localhost w.x.y.z   ip-w-x-y-z.us-west-1.compute.internal w.x.y.z   ip-w-x-y-z.localdomain

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