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• Ubuntu to Ubuntu VNC over SSH tunnel

  - by rxt

  I have a Linux Ubuntu desktop at home, ssh enabled, vnc server installed, router rule configured. It all works, and at home I can connect via the local network from my Mac. From the outside I can login via ssh. I've configured putty as follows: session: host name and port number connection ssh tunnel: forwarded ports: L5900|192.168.0.23 the local address is: 192.168.1.45 When I make the connection I can login to the remote machine. Then I open Remote Desktop Viewer. I click connect protocol: vnc host: ? use host as ssh tunnel: ? I don't know what to use for the last two options. Which ip-addresses should I use?

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• Remote reboot over ssh does not restart

  - by Finn Årup Nielsen

  I would like to remotely reboot my Ubuntu 12.04 LTS server via ssh. I do sudo reboot and I loose connection and the server connection does not reappear. It does not ping. When I go the the physical computer with a screen attached I see a black screen and hear that the server is still on. I do a hard power off (press power on button for a few seconds) and the server halts. After I press power on the server boots with no problem. As far as I remember the remote reboot has previously worked on that server. I wonder if sudo reboot & will help? I suppose I could also try sudo shutdown -r and see if that does any difference. I have listed an excerpt of /etc/log/syslog below. The last thing it records is the stopping of the logging. Oct 24 10:14:49 servername kernel: [1354427.594709] init: cron main process (1060) killed by TERM signal Oct 24 10:14:49 servername kernel: [1354427.594908] init: irqbalance main process (1080) killed by TERM signal Oct 24 10:14:49 servername kernel: [1354427.595299] init: tty1 main process (1424) killed by TERM signal Oct 24 10:14:49 servername kernel: [1354427.637747] init: plymouth-upstart-bridge main process (20873) terminated with status 1 Oct 24 10:14:49 servername kernel: Kernel logging (proc) stopped. Oct 24 10:14:49 servername rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="876" x-info="http://www.rsyslog.com"] exiting on signal 15. Oct 24 10:25:34 servername kernel: imklog 5.8.6, log source = /proc/kmsg started. Oct 24 10:25:34 servername rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="862" x-info="http://www.rsyslog.com"] start

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• How do you limit root partition disk access to allow drive to go into stanby mode?

  - by Casey

  When there are no users on my system, I would like the hard disk to spindown to low-power state. I realize that this might not be 100% achievable for a straight 24 hours, but it seems reasonable that the system could remain idle for a few hours at a time when it is not in use. My system is headless and running a limited number of services. The primary services are: exim4, mythtv-backend, nfs, samba, cups, apt-cacher-ng Assume that drives are already enabled to go into standby mode. Also, its not acceptable to increase the write-back timeout, since my system is not on a UPS.

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• pgAdmin cannot connect to PostgreSQL 9.1

  - by Nyxynyx

  I am trying to use pgAdmin on Windows to connect to postgresql 9.1.8 running on localhost's Ubuntu 12.04 VM. The host's port 5432 forwards to VM's port 5432. pgAdmin Error: Error connecting to the server: could not receive data from server: Software caused connection abortion (0x00002745/10053) postgresql.conf #------------------------------------------------------------------------------ # CONNECTIONS AND AUTHENTICATION #------------------------------------------------------------------------------ # - Connection Settings - listen_addresses = '*' port = 5432 pg_hba.conf local all postgres peer # TYPE DATABASE USER ADDRESS METHOD host all all 0.0.0.0/0 md5 host all all 127.0.0.1/32 md5 host all all ::1/128 md5 netstat -nlp | 5432 tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 29035/postgres unix 2 [ ACC ] STREAM LISTENING 50823 29035/postgres /var/run/postgresql/.s.PGSQL.5432 iptables rule iptables -I INPUT -p tcp --dport 5432 -j ACCEPT PostgreSQL service has been restarted and pgAdmin still gives the error. Any ideas what have caused it?

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• System will not boot without USB thumb drive inserted

  - by agent154

  I've had this issue before when trying out Linux Mint, but I was unable to get any assistance. I was then lead to believe that it was a problem related to Mint, and not grub. I installed Ubuntu 12.04 tonight on a second partition alongside Windows 7. I installed from a USB stick, and everything went peachy until I rebooted without the stick in my tower. It now says: error: no such device: 20cec6ca-4024-4237-84c3-2dba3c851497 grub rescue > I've verified via ls -l /dev/disk/by-uuid that my drive where Ubuntu is installed matches the UUID that supposedly doesn't exist. The UUID of my thumb drive when inserted happens to be 06B3-9C68. There is no mention of my USB drive's UUID anywhere in /boot/grub/grub.cfg I've also tried to re-install GRUB after booting into my system, removing the stick, and running grub-install /dev/sda. It still happens, and I cannot boot without the USB drive inserted into the computer. And what really gets my goat is that the boot order of my system is CDROMHard DriveUSB. It's not even reaching the USB to try to boot from it, so why does it matter that it's not there? Edit: Also, I ran grub-config without the stick in followed by another grub-install. Still no go. FWIW, here's my grub.cfg file: # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 set locale_dir=($root)/boot/grub/locale set lang=en_CA insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="$1" if [ "$1" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 3.2.0-25-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 linux /boot/vmlinuz-3.2.0-25-generic-pae root=UUID=20cec6ca-4024-4237-84c3-d2ba3c851497 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-25-generic-pae } menuentry 'Ubuntu, with Linux 3.2.0-25-generic-pae (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 echo 'Loading Linux 3.2.0-25-generic-pae ...' linux /boot/vmlinuz-3.2.0-25-generic-pae root=UUID=20cec6ca-4024-4237-84c3-d2ba3c851497 ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-25-generic-pae } submenu "Previous Linux versions" { menuentry 'Ubuntu, with Linux 3.2.0-23-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=20cec6ca-4024-4237-84c3-d2ba3c851497 ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-23-generic-pae } menuentry 'Ubuntu, with Linux 3.2.0-23-generic-pae (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 echo 'Loading Linux 3.2.0-23-generic-pae ...' linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=20cec6ca-4024-4237-84c3-d2ba3c851497 ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-23-generic-pae } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(hd1,msdos5)' search --no-floppy --fs-uuid --set=root 20cec6ca-4024-4237-84c3-d2ba3c851497 linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set=root 9014706714705268 chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ###

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• OSX 10.6 Cisco IPSEC strange behavior

  - by tair

  I'm trying to connect to Cisco IPSEC VPN of my company over DSL Internet. I managed to successfully connect using Cisco VPN Client, now I'm trying to switch to OSX 10.6 native client, because of licensing issues. The problems is that the connection fails with a dialog box containing the message: The negotiation with the VPN server failed. Verify the server address and try reconnecting. I checked logs: Jun 29 13:10:39 racoon[4551]: Connecting. Jun 29 13:10:39 racoon[4551]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 1). Jun 29 13:10:39 racoon[4551]: IKEv1 Phase1 AUTH: success. (Initiator, Aggressive-Mode Message 2). Jun 29 13:10:39 racoon[4551]: IKE Packet: receive success. (Initiator, Aggressive-Mode message 2). Jun 29 13:10:39 racoon[4551]: IKEv1 Phase1 Initiator: success. (Initiator, Aggressive-Mode). Jun 29 13:10:39 racoon[4551]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 3). Jun 29 13:10:42 racoon[4551]: IKE Packet: transmit success. (Mode-Config message). Jun 29 13:10:42 racoon[4551]: IKEv1 XAUTH: success. (XAUTH Status is OK). Jun 29 13:10:42 racoon[4551]: IKE Packet: transmit success. (Mode-Config message). Jun 29 13:10:42 racoon[4551]: IKEv1 Config: retransmited. (Mode-Config retransmit). Jun 29 13:10:42 racoon[4551]: IKE Packet: receive success. (MODE-Config). Jun 29 13:10:42 configd[19]: event_callback: Address added. previous interface setting (name: en1, address: 192.168.1.107), current interface setting (name: u92.168.54.147, subnet: 255.255.255.0, destination: 192.168.54.147). Jun 29 13:10:42 configd[19]: network configuration changed. Jun 29 13:10:42 vmnet-bridge[111]: Dynamic store changed Jun 29 13:10:42 named[62]: not listening on any interfaces Jun 29 13:10:58: --- last message repeated 1 time --- Jun 29 13:10:58 configd[19]: SCNCController: Disconnecting. (Connection tried to negotiate for, 16 seconds). Jun 29 13:10:58 racoon[4551]: IKE Packet: transmit success. (Information message). Jun 29 13:10:58 racoon[4551]: IKEv1 Information-Notice: transmit success. (Delete ISAKMP-SA). Jun 29 13:10:58 racoon[4551]: Disconnecting. (Connection tried to negotiate for, 19.113382 seconds). Jun 29 13:10:58 named[62]: not listening on any interfaces Jun 29 13:10:58 vmnet-bridge[111]: Dynamic store changed Jun 29 13:10:58 named[62]: not listening on any interfaces Jun 29 13:10:58 configd[19]: network configuration changed. Then I opened Terminal, started pinging a server behind VPN, and tried to connect again. Now connection is OK! Logs this time: Jun 29 13:46:53 racoon[8136]: Connecting. Jun 29 13:46:53 racoon[8136]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 1). Jun 29 13:46:53 racoon[8136]: IKEv1 Phase1 AUTH: success. (Initiator, Aggressive-Mode Message 2). Jun 29 13:46:53 racoon[8136]: IKE Packet: receive success. (Initiator, Aggressive-Mode message 2). Jun 29 13:46:53 racoon[8136]: IKEv1 Phase1 Initiator: success. (Initiator, Aggressive-Mode). Jun 29 13:46:53 racoon[8136]: IKE Packet: transmit success. (Initiator, Aggressive-Mode message 3). Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Mode-Config message). Jun 29 13:46:56 racoon[8136]: IKEv1 XAUTH: success. (XAUTH Status is OK). Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Mode-Config message). Jun 29 13:46:56 racoon[8136]: IKEv1 Config: retransmited. (Mode-Config retransmit). Jun 29 13:46:56 racoon[8136]: IKE Packet: receive success. (MODE-Config). Jun 29 13:46:56 configd[19]: event_callback: Address added. previous interface setting (name: en1, address: 192.168.1.107), current interface settinaddress: 192.168.54.149, subnet: 255.255.255.0, destination: 192.168.54.149). Jun 29 13:46:56 vmnet-bridge[111]: Dynamic store changed Jun 29 13:46:56 named[62]: not listening on any interfaces Jun 29 13:46:56 configd[19]: network configuration changed. Jun 29 13:46:56 named[62]: not listening on any interfaces Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Initiator, Quick-Mode message 1). Jun 29 13:46:56 racoon[8136]: IKE Packet: receive success. (Initiator, Quick-Mode message 2). Jun 29 13:46:56 racoon[8136]: IKE Packet: transmit success. (Initiator, Quick-Mode message 3). Jun 29 13:46:56 racoon[8136]: IKEv1 Phase2 Initiator: success. (Initiator, Quick-Mode). Jun 29 13:46:56 racoon[8136]: Connected. Jun 29 13:46:56 configd[19]: SCNCController: Connected. I tested it several times and it consistently behaves the same. What is the magic?

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• Update to Windows 8.1 without using Windows Store

  - by Hari

  I am currently using Windows 8 on my desktop PC. I want to upgrade to Windows 8.1. I heard that Microsoft provides this update through Microsoft Store for free. But in My home I don't have a faster internet connection. I downloaded a Windows 8.1 ISO from cafe, but when I started installing, it asks for a key. I typed my original Key for windows 8, but it didn't work. Is there any way for me to update to Windows 8.1 without an internet connection and without purchasing another key? Thank you

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• Does using a single cable to connect two switches create a bottleneck?

  - by Nick

  I realise this may be a stupid question for some, but it's something I've always wondered about. Let's say we have two gigabit switches and all of the devices on the network are also gigabit. If 10 computers connected to switch A need to transfer large amounts of data to a server on Switch B (at the same time), is the maximum transfer speed of each connection limited by the bandwidth of the connection between the two switches? In other words, would each computer only be able to transfer at a speed of one gigabit divided by the 10 machines trying to use the "bridge" between switches? If so, are there any workarounds so that every device can use it's maximum speed from point to point?

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• Problem adding public key for apt

  - by highBandWidth

  I was trying to get the official mongodb for Ubuntu, following the instructions at http://www.mongodb.org/display/DOCS/Ubuntu+and+Debian+packages After adding the deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen line in my sources, I need to add the pgp key since synaptic says W: GPG error: http://downloads-distro.mongodb.org dist Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9ECBEC467F0CEB10 Again following instructions, I did sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10 this says Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /etc/apt/secring.gpg --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver keyserver.ubuntu.com --recv 7F0CEB10 gpg: requesting key 7F0CEB10 from hkp server keyserver.ubuntu.com ?: keyserver.ubuntu.com: Connection refused gpgkeys: HTTP fetch error 7: couldn't connect: Connection refused gpg: no valid OpenPGP data found. gpg: Total number processed: 0 Interestingly, I also get $ apt-key list gpg: fatal: /home/myname/.gnupg: directory does not exist! secmem usage: 0/0 bytes in 0/0 blocks of pool 0/32768 How can I get apt to use this source?

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• SQL Azure Security: DoS

  - by Herve Roggero

  Since I decided to understand in more depth how SQL Azure works I started to dig into its performance characteristics. So I decided to write an application that allows me to put SQL Azure to the test and compare results with a local SQL Server database. One of the options I added is the ability to issue the same command on multiple threads to get certain performance metrics. That's when I stumbled on an interesting security feature of SQL Azure: its Denial of Service (DoS) detection engine. What this security feature does is that it performs a check on the number of connections being established, and if the rate of connection is too high, SQL Azure blocks all communication from that machine. I am still trying to learn more about this specific feature, but it appears that going to the SQL Azure portal and testing the connection from the portal "resets" the feature and you are allowed to connect again... until you reach the login threashold. In the specific test I was performing, all the logins were successful. I haven't tried to login with an invalid account or password... that will be for next time. On my Linked In group (SQL Server and SQL Azure Security: http://www.linkedin.com/groups?gid=2569994&trk=hb_side_g) Chip Andrews (www.sqlsecurity.com) pointed out that this feature in itself could present an internal threat. In theory, a rogue application could be issuing many login requests from a NATed network, which could potentially prevent any production system from connecting to SQL Azure within the same network. My initial response was that this could indeed be the case. However, while the TCP protocol contains the latest NATed IP address of a machine (which masks the origin of the machine making the SQL request), the TDS protocol itself contains the IP Address of the machine making the initial request; so technically there would be a way for SQL Azure to block only the internal IP address making the rogue requests.  So this warrants further investigation... stay tuned...

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• Could not retrieve backup settings for primary ID in Log shipping

  - by user1723139

  I am doing log shipping between two Amazon EC2 instances running Windows Server 2008 R2 with SQL Server 2008 R2 standard edition. Both the instances are in the same domain and I can access the shared folders between the instances. The SQL server service account, agent service account are all running under a domain account. When I activate log shipping (with stand by mode restore in secondary server), the initial backup gets restored on the secondary. After that the backup operation is getting failed and i get the following error message: *** Error: Could not retrieve backup settings for primary ID 'xxxxxx-xxxx-xxxx-xxxx-4d772cd7337e'.(Microsoft.SqlServer.Management.LogShipping) *** *** Error: Failed to connect to server IP-0A7653F2.(Microsoft.SqlServer.ConnectionInfo) *** ****** Error: A network-related or instance-specific error occurred while establishing a connection to SQL Server.******** **The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)(.Net SqlClient Data Provider) *** **----- END OF TRANSACTION LOG BACKUP -----**** Any ideas?

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• 421 Concurrent Connections - Ratelimit from helpdesk to rackspace server

  - by g18c

  We have Kayako helpdesk running on our WHM Linux server. When e-mails come in from customers, notifications are sent out by Kayako to a number of staff whose mailboxes are hosted on Rackspace mail servers. I noticed a large queue in the Exim queued message viewer of WHM - when looking in Exim logs I can see many lines 2012-10-13 20:06:56 1TN72s-0007Cw-1l SMTP error from remote mail server after initial connection: host mx2.emailsrvr.com [173.203.2.32]: 421 Too many concurrent connections from this client. One client email results in about 5 emails to rackspace servers, perhaps 60 emails per 1 hour on average - not a huge amount but enough to cause messages to be rejected when sent in short bursts. In this case ideally if we can limit the connections sent to the rackspace server we can comply with their limit. For our requirements if we send 1 email every10 seconds or so, this would be OK. Messages to all other servers should go through a normal rates, only mx1.emailsrvr.com and mx2.emailsrvr.com should have this connection limit policy applied. Is this possible?

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• Ubuntu One Bookmark sync not working.

  - by Rob

  Everything in Ubuntu One sync works great except bookmark sync. I tried the wiki answer that said to run: killall beam.smp beam rm ~/.config/desktop-couch/desktop-couchdb.ini dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort This is what my terminal came back with: robin@robin-MIDWAY:~$ killall beam.smp beam beam: no process found robin@robin-MIDWAY:~$ rm ~/.config/desktop-couch/desktop-couchdb.ini rm: cannot remove `/home/robin/.config/desktop-couch/desktop-couchdb.ini': No such file or directory robin@robin-MIDWAY:~$ dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. robin@robin-MIDWAY:~$ I'm a computer "newbie" so it's possible I'm doing something wrong, are there any tutorials out there on how to use the CouchDB? I have Bindwood installed.

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• How to connect to DSL modem using PPPoE?

  - by VJo

  Hello, I am connecting to the internet through a pppoe connection, but for some reason I can not connect to my modem (it's address is 192.168.1.1). Before I set my pppoe connection, I could connect. So, is there a way? EDIT The output of ifconfig is : r@PlaviZec:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:13:d4:f7:02:d4 inet6 addr: fe80::213:d4ff:fef7:2d4/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2811 errors:0 dropped:0 overruns:0 frame:0 TX packets:2801 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2538831 (2.5 MB) TX bytes:448591 (448.5 KB) Interrupt:21 Base address:0xa000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:28 errors:0 dropped:0 overruns:0 frame:0 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1600 (1.6 KB) TX bytes:1600 (1.6 KB) ppp0 Link encap:Point-to-Point Protocol inet addr:92.229.42.177 P-t-P:213.191.64.59 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1 RX packets:2794 errors:0 dropped:0 overruns:0 frame:0 TX packets:2741 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:2476277 (2.4 MB) TX bytes:381240 (381.2 KB)

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• Can't log in via SSH to any accounts set to use /bin/bash as a default shell

  - by Gui Ambros

  I'm trying to install bash as the default shell on a ARM Linux running on an embedded device (Synology DS212+ NAS). But there's something really wrong, and I can't figure out what it is. Symptoms: 1) Root has /bin/bash as default shell, and can log in normally via SSH: $ grep root /etc/passwd root:x:0:0:root:/root:/bin/bash $ ssh root@NAS root@NAS's password: Last login: Sun Dec 16 14:06:56 2012 from desktop # 2) joeuser has /bin/bash as default shell, and receives "Permission denied" when trying to log in via SSH: $ grep joeuser /etc/passwd joeuser:x:1029:100:Joe User:/home/joeuser:/bin/bash $ ssh joeuser@localhost joeuser@NAS's password: Last login: Sun Dec 16 14:07:22 2012 from desktop Permission denied, please try again. Connection to localhost closed. 3) changing joeuser's shell back to /bin/sh: $ grep joeuser /etc/passwd joeuser:x:1029:100:Joe User:/home/joeuser:/bin/sh $ ssh joeuser@localhost Last login: Sun Dec 16 15:50:52 2012 from localhost $ To make things even more strange, I can log in as joeuser using /bin/bash using the serial console (!). Also a su - joeuser as root works fine, so the bash binary itself is working fine. In an act of despair, I changed joeuser's uid to 0 on /etc/passwd, but also didn't work, so it doesn't seem to be anything permission related. Seems that bash is doing some extra checking that sshd didn't like, and blocking the connections for non-root users. Maybe some sort of sanity checking - or terminal emulation - that is triggering the SIGCHLD, but only when called via ssh. I already went through every single item on sshd_config, and also put SSHD in debug mode, but didn't find anything strange. Here's my /etc/ssh/sshd_config: LogLevel DEBUG LoginGraceTime 2m PermitRootLogin yes RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile %h/.ssh/authorized_keys ChallengeResponseAuthentication no UsePAM yes AllowTcpForwarding no ChrootDirectory none Subsystem sftp internal-sftp -f DAEMON -u 000 And here's the output from /usr/syno/sbin/sshd -d, showing the failed attempt of joeuser trying to log in, with /bin/bash as the shell: debug1: Config token is loglevel debug1: Config token is logingracetime debug1: Config token is permitrootlogin debug1: Config token is rsaauthentication debug1: Config token is pubkeyauthentication debug1: Config token is authorizedkeysfile debug1: Config token is challengeresponseauthentication debug1: Config token is usepam debug1: Config token is allowtcpforwarding debug1: Config token is chrootdirectory debug1: Config token is subsystem debug1: HPN Buffer Size: 87380 debug1: sshd version OpenSSH_5.8p1-hpn13v11 debug1: read PEM private key done: type RSA debug1: private host key: #0 type 1 RSA debug1: read PEM private key done: type DSA debug1: private host key: #1 type 2 DSA debug1: read PEM private key done: type ECDSA debug1: private host key: #2 type 3 ECDSA debug1: rexec_argv[0]='/usr/syno/sbin/sshd' debug1: rexec_argv[1]='-d' Set /proc/self/oom_adj from 0 to -17 debug1: Bind to port 22 on ::. debug1: Server TCP RWIN socket size: 87380 debug1: HPN Buffer Size: 87380 Server listening on :: port 22. debug1: Bind to port 22 on 0.0.0.0. debug1: Server TCP RWIN socket size: 87380 debug1: HPN Buffer Size: 87380 Server listening on 0.0.0.0 port 22. debug1: Server will not fork when running in debugging mode. debug1: rexec start in 6 out 6 newsock 6 pipe -1 sock 9 debug1: inetd sockets after dupping: 4, 4 Connection from 127.0.0.1 port 52212 debug1: HPN Disabled: 0, HPN Buffer Size: 87380 debug1: Client protocol version 2.0; client software version OpenSSH_5.8p1-hpn13v11 SSH: Server;Ltype: Version;Remote: 127.0.0.1-52212;Protocol: 2.0;Client: OpenSSH_5.8p1-hpn13v11 debug1: match: OpenSSH_5.8p1-hpn13v11 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1-hpn13v11 debug1: permanently_set_uid: 1024/100 debug1: MYFLAG IS 1 debug1: list_hostkey_types: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: AUTH STATE IS 0 debug1: REQUESTED ENC.NAME is 'aes128-ctr' debug1: kex: client->server aes128-ctr hmac-md5 none SSH: Server;Ltype: Kex;Remote: 127.0.0.1-52212;Enc: aes128-ctr;MAC: hmac-md5;Comp: none debug1: REQUESTED ENC.NAME is 'aes128-ctr' debug1: kex: server->client aes128-ctr hmac-md5 none debug1: expecting SSH2_MSG_KEX_ECDH_INIT debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user joeuser service ssh-connection method none SSH: Server;Ltype: Authname;Remote: 127.0.0.1-52212;Name: joeuser debug1: attempt 0 failures 0 debug1: Config token is loglevel debug1: Config token is logingracetime debug1: Config token is permitrootlogin debug1: Config token is rsaauthentication debug1: Config token is pubkeyauthentication debug1: Config token is authorizedkeysfile debug1: Config token is challengeresponseauthentication debug1: Config token is usepam debug1: Config token is allowtcpforwarding debug1: Config token is chrootdirectory debug1: Config token is subsystem debug1: PAM: initializing for "joeuser" debug1: PAM: setting PAM_RHOST to "localhost" debug1: PAM: setting PAM_TTY to "ssh" debug1: userauth-request for user joeuser service ssh-connection method password debug1: attempt 1 failures 0 debug1: do_pam_account: called Accepted password for joeuser from 127.0.0.1 port 52212 ssh2 debug1: monitor_child_preauth: joeuser has been authenticated by privileged process debug1: PAM: establishing credentials User child is on pid 9129 debug1: Entering interactive session for SSH2. debug1: server_init_dispatch_20 debug1: server_input_channel_open: ctype session rchan 0 win 65536 max 16384 debug1: input_session_request debug1: channel 0: new [server-session] debug1: session_new: session 0 debug1: session_open: channel 0 debug1: session_open: session 0: link with channel 0 debug1: server_input_channel_open: confirm session debug1: server_input_global_request: rtype [email protected] want_reply 0 debug1: server_input_channel_req: channel 0 request pty-req reply 1 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req pty-req debug1: Allocating pty. debug1: session_new: session 0 debug1: session_pty_req: session 0 alloc /dev/pts/1 debug1: server_input_channel_req: channel 0 request shell reply 1 debug1: session_by_channel: session 0 channel 0 debug1: session_input_channel_req: session 0 req shell debug1: Setting controlling tty using TIOCSCTTY. debug1: Received SIGCHLD. debug1: session_by_pid: pid 9130 debug1: session_exit_message: session 0 channel 0 pid 9130 debug1: session_exit_message: release channel 0 debug1: session_by_tty: session 0 tty /dev/pts/1 debug1: session_pty_cleanup: session 0 release /dev/pts/1 Received disconnect from 127.0.0.1: 11: disconnected by user debug1: do_cleanup debug1: do_cleanup debug1: PAM: cleanup debug1: PAM: closing session debug1: PAM: deleting credentials Here you have the full output of sshd -dd, together with ssh -vv. Bash: # bash --version GNU bash, version 3.2.49(1)-release (arm-none-linux-gnueabi) Copyright (C) 2007 Free Software Foundation, Inc. The bash binary was cross compiled from source. I also tried using a pre-compiled binary from the Optware distribution, but had the exact same problem. I checked for missing shared libraries using objdump -x, but they're all there. Any ideas what could be causing this "Permission denied, please try again."? I'm almost diving in the bash source code to investigate, but trying to avoid hours chasing something that may be silly.

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• can't connect to Sql Sever Management Express 2012

  - by Rare-Man

  i installed Sql Sever Management Express 2012 , but when i try to connect in Sql management studio enviroment , i have this error . TITLE: Connect to Server Cannot connect to .. ADDITIONAL INFORMATION: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2) For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476 The system cannot find the file specified BUTTONS: OK ................................................................................... and in during installion i dont have option for select cluster !! this is my SQL Server Configuration Manager , my sql server service is empty ... And when get Remove a Failover Cluster Node , this error happened . http://oi57.tinypic.com/2lrvat.jpg

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• HOw to give static ip to router from window XP LAN

  - by Captain Planet

  I have the USB modem internet connection. I am using ICS sharing in XP to share my internet connection. ON window XP LAN i have set up the LAN IP as 192.168.137.1 255.255.255.0 Now i have joined the cable from that XP LAN to another LAPTOP running vista Now if set the LAN on VISTA to get ip automatically them internet don't work but if manually set the ip to 192.168.137.3 255.255.255.0 gateway 192.168.137.1 Then my internet works But i want to join that LAN cable from XP to rouer so that i can use router to divide internet. But i don't know how i can give static ipto router because i think somehow that LAN on XP is not giving the IP address

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• Filemaker 10 Advanced sending email via script & SMTP

  - by Sean

  We are using a windows server box to run the databases but we have found via the headers that the emails are send from the local workstation. We have moved to a new email system and have set up a local linux server to securely send email out of our network to devices that do not support new protocols and encryption. But once we set up the script in filemaker 10 advanced (the local machine os x) we set it to the ip of our local box with no authentication but it does not send out an email. It creates a connection we see in the logs on the linux box but nothing more, additionally you can start a telnet connection with no issues. We have also made sure that there are no additional issue that we can see in our firewall policies. Any ideas where we should start? Does Filemaker 10 advanced log errors anywhere because I could not find any log files.

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• Policy Routing with Openvpn?

  - by sadawd

  Dear Everyone I am currently using openvpn for normal browsing. However, I have the following services running: a bit torrent client, a web server, IRC and a git server which I would really want it to not be using my vpn connection (and use my original connection instead). Is there a way to do this? I looked up policy routing and I can't really find any tutorial on how to do this on linux (I am on ubuntu). I don't want the solution to be incredibly complicated - I am pretty new to networking in ubuntu and I only want a very simple solution to this problem. Can someone help me out?

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• s3fs: how to force remount on errors?

  - by Alexander Gladysh

  I use s3fs 1.33 on Ubuntu 9.10. Regularily it gives me errors like this: rsync: writefd_unbuffered failed to write 4 bytes to socket [sender]: Broken pipe (32) rsync: close failed on "/mnt/s3/mybucket/filename": Software caused connection abort (103) rsync error: error in file IO (code 11) at receiver.c(731) [receiver=3.0.6] rsync: connection unexpectedly closed (86 bytes received so far) [sender] rsync error: error in rsync protocol data stream (code 12) at io.c(600) [sender=3.0.6] Any attempt to work with mounted directory after that gives this error: Transport endpoint is not connected To get rid of this, I have to remount. Is there a way to force a remount automatically?

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• how can make transparent proxy on more than one port?

  - by ermya

  i want to make transparent proxy with linux ( centos) , i want all incoming connection on port 1000 - 2000 on eth0 forward to eth1 on port 1000 - 2000 in transparent mode i have 2 server 1- linux ( proxy server) 2- windows i want protect my windows server with my linux server firewall also i must make transparent proxy with my linux server linux server have 2 interface one for public network an another for private network connected to windows server so all incoming connection must connect to the linux server (at eth0 public network) first and after checking , must forward to the windows server on private network (with linux interface eth1 ) i can use squid for making transparent proxy but i dont know how i must config the squid for multi port because i want listen in more than 1000 ports for example from port 1000 to 2000 anyone know how can i do ?

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• Gateway setting is empty

  - by Dodi Jones

  This laptop hasn't been used in almost a year. It connected to the internet just fine last time used. Now it can't get on line. ipconfig:The Gateway setting for this computer is empty. Make sure your access point is working properly. Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. C:\Documents and Settings\Dodi>IPCONFIG /ALL Windows IP Configuration Host Name . . . . . . . . . . . . : 8A287A4ADEF0487 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Wireless Network Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : LAN-Express AS IEEE 802.11g miniPCI Adapter Physical Address. . . . . . . . . : 00-14-A4-72-37-E1 Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : 192.168.0.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : 192.168.1.1 Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connection Physical Address. . . . . . . . . : 00-01-4A-EF-A8-7D How do I fix this?

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• Mac OS X: pushing all traffic through a VMWare VM [closed]

  - by bj99

  I want to set up an Astaro (Sophos) UTM in a Virtual Machine. The Setup should be at the end the following: Cable Modem (one IP adress) | [Ethernet] Sophos UTM (running as VM [VMWare Fusion 5] on the MacMini) | [WIFI] Airport Express v2 (for sharing Local Network to wireless and wired clients) 1)| [WIFI] 2)| [Ethernet over Thunderbolt Ethernet Adapter]* Clients MacMini (Local File Server) *To have the Mini also protected behind the UTM So the setup process for the UTM works fine, but then the problems start: I just have one external IP (from my cable modem provider)== So if I put the VM in briged mode my Internet connection drops, because the MacMini also has its IP adress. If I put the VM to NAT mode the Mini itself is not protected by the UTM So: is there a way to hide the en0 interface(Ethernet) and the en1 interface (Wifi) from the MacMini, so that they not even appear in System Preferences Network section but are available to the VM? That way the Mini must connect to the en2 interface (Thunderbolt adapter) to make any Internet/LAN connection and I just use the given single IP from the Cable Modem. Thaks for any suggestions... Sebastian

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• DDWRT or similar as repeater in a network.

  - by Quantumplation

  I have a friend with sever connection issues due to her wireless router being on the bottom floor of her house, and the computer being a story or two away. I have several old Linksys routers lying about, one of which is currently running DDWRT for my network. Would it be a good idea (effective) to configure one of these routers as a wireless bridge of some kind in an intermediary floor to improve her connection? Is there any specific configuration beyond the standard DDWRT setup that I would need to do? Thanks for your help. =)

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• How to get Broadcom BCM 43XX Wireless card working

  - by Fer1805

  NOTE - Although this question is for a specific version of Ubuntu and a specific Broadcom model, the answer to it is for most Broadcom models and versions of Ubuntu 11.04, 11.10, 12.04 and 12.10. If you have come here from another question, feel free to read the answer instead. The answer covers many problems with several solutions. I'm having serious problems installing the Broadcom drivers for Ubuntu 11.04. It worked perfectly on my previous version, but now, it is impossible. I'm a user with no advance knowledge in Linux, so I would need clear explanations on make, compile, etc. I was following the instructions on the following blog, with no luck. How can I get Broadcom BCM4311 Wireless working? Can someone help me? Edit: For the command: "lspci | grep Network", I get the following message: 06:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) For the command: iwconfig, i get the following: lo no wireless extensions. eth0 no wireless extensions. When i follow the following steps (from the above link), there are a NO error message at all: open the 'Synaptic Package Manager' and search for bcm uninstall the bcm-kernel-source package make sure that the firmware-b43-installer and the b43-fwcutter packages are installed type into terminal: cat /etc/modprobe.d/* | egrep '8180|acx|at76|ath|b43|bcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|witch|wl' (you may want to copy this) and see if the term blacklist bcm43xx is there if it is, type cd /etc/modprobe.d/ and then sudo gedit blacklist.conf put a # in front of the line: blacklist bcm43xx then save the file (I was getting error messages in the terminal about not being able to save, but it actually did save properly). reboot 'End of procedure' Before (not ubuntu 11.04), if i wanted to connect wireles, i just went to the icon at the upper side of the screen, click, showed ALL the wireless network available, and done. Now, the only options i see are: Wired Network Auto Eth0 Disconnect VPN Enable networking Connection information Edit connection. hope above info is enough for your help.

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