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• Windows 7 Multi-NIC woes

  - by Eric

  I have Comcast business Internet here. It gives me 5 static IPs. Most of the machines in my house connect to a router like every other household. It has a 192.168.117.x subnet, DHCP Server, etc. and all is well. However, I have a second machine on MY desk that has a life Internet IP. Up until yesterday, this machine was running XP Pro. The primary NIC was manually set to 192.168.117.241 with no gateway, and the secondary NIC was manually set to 173.x.x.171 with a gateway of 173.x.x.174. This worked just fine for years. Yesterday I replaced that XP machine with a brand new Windows 7 x64 box. Again, I configured it the same way. The onboard NIC was given a static 192.168.117.x address with no gateway, and the secondary NIC was given a live Internet IP address with the proper router, etc. 2 Problems. First is that the internal network (192.168.117.x) is listed as a public network because there's no gateway, so that means no homegroup, no file sharing, none of that. And I can't change it from what I'm reading... The second is that the machine reports the "router" ip address as it's address, and not the address that it's supposed to. I'm ready to tear my hair out over this. Any ideas?

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• Samba and Windows 7

  - by John Gaughan

  I built a new computer with the intention of it being primarily a home file server. Here is my setup: one desktop with Windows 7 64 HP one laptop with Windows 7 64 HP one desktop with Kubuntu 11.10 (server) The two desktops use static IPs, and I have hostnames mapped in the HOSTS files on all three systems. I have the same username/password combo on all three systems. I have been trying for a while now to set up Samba so the Windows 7 systems can see and use it. Even if I can get the server to show up, Windows is unable to log in. One of the first things I did was to enable LMv2 authentication, which this version of Samba (3.5.11) supports. The workgroup is set correctly. I can normally see the server, but cannot authenticate. Windows homegroup is turned off. Pinging between machines works fine, and the two Windows 7 systems work together flawlessly. What I am trying to do is set up Samba to use peer to peer networking using NTLM security and user-mode authentication. According to the documentation this is possible, but there are no examples that I could find. In all the googling I have done, I see a lot of people asking how to set this up but it either works for someone else and not for me (no idea what I'm missing), or it doesn't work. Has anyone gotten this to work? Is there a place I could download a smb.conf that is set up to work in this environment?

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• Headless VirtualBox VM NAT Network

  - by dirt

  I have a remote linux server accessible through SSH only. My goal is to host multiple Virtual Machines on this host server using VirtualBox. The host server has 1 IP address, so NAT will be used to route to the VMs for example 10022 will forward to server1:22 and 20022 will forward to server2:22. I have installed VirtualBox and copied a pre-configured CentOS VM to the host server. I start the VM, but cannot establish a connection to the server for example ssh -p 10022 127.0.0.1 times out. I've tried many things: Method 1: Copied existing .vdi, attached to new VM Method 2: Imported .Ova VM (thought it would help any MAC re-init issues?) NAT network type, tried natnet1 192.168/16 and 10.0/16 VBoxManage modifyvm "hermes.awoms.com" --natnet1 "192.168/16" Port forwarding with and without specifying VM ip in modifyvm --natpf1 command VBoxManage modifyvm "hermes" --natpf1 "guestssh,tcp,,10022,,,22" VBoxManage modifyvm "hermes" --natpf1 "guestssh,tcp,,10022,192.168.0.15,22" I can't see if VM is even booting (VBoxHeadless "hermes" --start & runs with no errors) I can't tell if VM is getting an IP address Is there anything else I can do to get more information from VirtualBox or the VM starting up when the only access I have is SSH?

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• ssh key questions

  - by Tim

  I have some questions regarding generating keys for ssh access: (1) Supposed there are two computers running ssh server service and I have generated a pair of key files on computer A and copy the public file to computer B. Is it true that this is only a one-way key: We only gave computer A permission to access computer B, not gave computer B permission to access computer A? If I now want to ssh from computer B to computer A, must I generat another pair of key files on computer B and copy the public file to computer A? (2) If I would like to connect a single local computer to several remote servers, is it to generate a common pair of key files only once on the local and copy the same public file to the remote servers, or to generate different pair of key files on the local for different remote servers? (3) If I would like to connect several local computers to a single remote server, when copying the public files from different local computers to the remote server, is it to combine them together into a single authorized_keys file or store them in different authorized_keys files? (4) If there are several servers shared the same file system by, for example, NFS, how to generate keys and arrange the key files for accessing from one server to the other? Also how to still generate keys and arrange the key files for a local computer to access anyone of the servers? All the machines above are Linux.Please provide examples and commands in your reply so that I can better understand how to solve the problems. Thanks and regards!

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• Is it possible to re-cab an Administrative Install Point?

  - by Nathaniel Bannister

  We have Acrobat 8 Pro at work, and our media was painfully out of date. Rather than install all of the machines at 8.0.0 and then do the 6 or 7 consecutive reboots adobe expects you to be ok with I decided I'd integrate the .msp files into the installer. After reading up on it, I figured out the exact patch order that adobe required, extracted my cd to an Administrative install point, and ran the patches against it: msiexec /a AcroPro.msi /p AcrobatUpd810_efgj_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd811_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd812_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd813_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd816_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd817_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd820_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd822_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd823_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd825_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" msiexec /a AcroPro.msi /p AcrobatUpd826_all_incr.msp TARGETDIR="C:\Acrobat8" /log "output.log" Now I have a AIP that is fully patched to 8.2.6 (Tested working prior to attempting to CAB it), but is absolutely huge (1.2gb) what I would like to do is take the folders within the AIP and put them back into a cab file for the sake of convenience in transferring the files around. I tried the command: cscript "C:\Program Files\Microsoft SDKs\Windows\v7.0\Samples\sysmgmt\msi\scripts\WiMakCab.vbs" AcroPro.msi Data1 /L /C /S Per the guide I was using, while this did produce the cab file I Wanted, however the resulting MSI fails to install with an error 2602: It's been a while since I've done something like this, and it's probably a glaring oversight on my part, but any insight would be much appreciated.

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• Are Colocation Cross Connects Worth While

  - by SvrGuy

  We currently operate three clusters of collocated machines in different data centers. Recently, I became aware that our newest data center will offer to cross connect us to a bandwidth provider free of charge. In the past, I never really investigated a cross connect for bandwidth because I figured that the rates would be similar to what we are paying the colo now and that it would reduce our resiliency (because we would only be using one or two carriers for IP, where as the colo uses, say 8 different providers). Then I saw an ad for hurricane electric internet services (http://he.net/cgi-bin/ip_transit_quote) that gave a price for IP transit at $1/Mbs, which is much better than the $30/Mb we pay for the blended bandwidth. What are people out there typically paying for bandwith via cross connect and how hard is to setup? Is my understanding that what you do is open agreemetns with two or three ISPs, cross connect to them and then configure your top of rack router on their network. Can you really get IP transit down to a couple of dollars per megabit per month just by doing the routing yourself? Or, is my understanding of cross connection fundamentally wrong?

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• Migrating mysql 4 to mysql 5

  - by Lennart Regebro

  This seems to me to be a common use case, so I'm surprised so little information is about it, so sorry if it's a duplicate, but I have searched. :) I'm migrating a clients website from one CMS to another, and of moving to newer faster machines all at the same time. As a part of this I'm moving a MySQL database from the old server to the new ones. The problem is that the old server runs MySQL 4 and the new MySQL 5. So when i do a mysqldump at the old site and then try to run it on the new site I get syntax errors. ERROR 1064 (42000) at line 178: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'BTREE (`id`), KEY `f_ChangedOnWeb` (`f_ChangedOnWeb`), KEY `f_AddressUpdate`' at line 56 I also tried to use an even older syntax by dumping with --compatible mysql323, but that just resulted in ERROR 1062 (23000) at line 2283: Duplicate entry '??????????' for key 2`... It seems to me this must be a reasonably common use case, yet I can't find any sort of help on this. Possibly all my Google searches just drown in irrelevant answers. Most seem to agree that mysqldump is the right answer, but noone mentions that you can get syntax errors...

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• Debian Linux bridging router intermittently dropping packets [migrated]

  - by nomen

  My old Asus router died a few weeks ago, so I thought I'd set up my Debian box to deal with routing my home network. I have a few complications, but I adapted my configuration from a previously working configuration, and I don't see why I am having intermittent problems. But I am having them! Every so often, my SSH connections to the router (and to the Xen virtual machines hosted by the router) just drop. I am unable to use the router's dns server. I can't ping the router. Etc. (I can provide more details, but I'm not sure what will be helpful) /etc/network/interfaces: # The loopback network interface auto lo iface lo inet loopback # Gigabit ethernet, internal network auto eth0 allow-hotplug eth0 iface eth0 inet manual # USB ethernet, internet auto eth1 allow-hotplug eth1 iface eth1 inet dhcp # Xen Bridge auto xlan0 iface xlan0 inet static bridge_ports eth0 address 10.47.94.1 netmask 255.255.255.0 As I understand it, this is sufficient to create the network interfaces, and even do some switching between Xen hosts and my eth0 interface. I installed and configured Shorewall to manage routing: /etc/shorewall/zones fw firewall net ipv4 lan ipv4 /etc/shorewall/interfaces net eth1 detect dhcp,tcpflags,nosmurfs,routefilter,logmartians lan xlan0 detect dhcp,tcpflags,nosmurfs,routefilter,logmartians,routeback,bridge /etc/shorewall/policy net all DROP info fw net ACCEPT info all all REJECT info /etc/shorewall/rules DNS(ACCEPT) fw net DNS(ACCEPT) lan fw ... and so on, these all work, when the router is accepting traffic at all. /etc/shorewall/masq eth1 10.47.94.0/24 Can anybody help?

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• setting up a proxy to mirror an SSH SOCKS connection

  - by aresnick

  I have two remote machines, remote1 and remote2. remote2 is only running sshd, and I can't run anything else on it. remote1 is a full-fledged server to which I have complete access. I can run a SOCKS proxy on remote2 via ssh -f -N -D *:8080 me@remote2 which lets me expose a SOCKS proxy on port 8080 on remote1. I'd like to authenticate this so that the proxy isn't sitting open. How can I do this? It seems like I should be able to use delegate, but I can't even seem to get its HTTP proxy functionality working. When I run delegated -r -P8081 SERVER=http PERMIT="*:*:*" REMITTABLE="*" I can't even get it to work on port 8081. Anyway, I was hoping someone could point me in the right direction to let me authenticate access to the SOCKS proxy connection? That is, I want to be able to point my browser's proxy at remote1 and browse the internet through the SSH SOCKS proxy/tunnel to remote2. squid doesn't support a SOCKS parent =( Thanks!

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• How to get robocopy running in powershell?

  - by Moo MinTroll

  I'm trying to use robocopy inside powershell to mirror some directories on my home machines. Here's my script: param ($configFile) $config = Import-Csv $configFile $what = "/COPYALL /B /SEC/ /MIR" $options = "/R:0 /W:0 /NFL /NDL" $logDir = "C:\Backup\" foreach ($line in $config) { $source = $($line.SourceFolder) $dest = $($line.DestFolder) $logfile = $logDIr $logfile += Split-Path $dest -Leaf $logfile += ".log" robocopy "$source $dest $what $options /LOG:MyLogfile.txt" } The script takes in a csv file with a list of source and destination directories. When I run the script I get these errors: ------------------------------------------------------------------------------- ROBOCOPY :: Robust File Copy for Windows ------------------------------------------------------------------------------- Started : Sat Apr 03 21:26:57 2010 Source : P:\ C:\Backup\Photos \COPYALL \B \SEC\ \MIR \R:0 \W:0 \NFL \NDL \LOG:MyLogfile.txt\ Dest - Files : *.* Options : *.* /COPY:DAT /R:1000000 /W:30 ------------------------------------------------------------------------------ ERROR : No Destination Directory Specified. Simple Usage :: ROBOCOPY source destination /MIR source :: Source Directory (drive:\path or \\server\share\path). destination :: Destination Dir (drive:\path or \\server\share\path). /MIR :: Mirror a complete directory tree. For more usage information run ROBOCOPY /? **** /MIR can DELETE files as well as copy them ! Any idea what I need to do to fix? Thanks, Mark.

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• Live Mesh starts exactly once on fresh Win7 Ultimate installation

  - by Reb.Cabin

  I did a fresh install of Windows 7 Ulimate 64-bit on a formatted drive on a refurbed Lenovo PC, applied all 102 (!) windows updates, windows seems to be working fine. No quirks installing, no apps, no junkware, just straight, legal, Win7 Ultimate right from an unopened 2009 Microsoft box. Ok, breathe sigh -- Install Live Mesh (no messenger, no mail, no writer, no photo, none of the rest of the Windows Live freeware). Set up my shares, let it run overnight. watch MOE.exe in the Task-Manager perf pane to make sure it's all settled down. reboot. Ok, check that MOE is running and files are getting updated properly from other machines in the mesh. Great. HOWEVER -- when I try to launch Windows Live Mesh app from the Start jewel, I get a brief hourglass, then nothing. Reboot. Same story. result -- the shares I already posted seem to be synching properly, but I can't run the app, so I can't add and delete shares. The background process MOE seems to run, but I can't get the app going. btw, the reason I did this fresh install is I had exactly the same experience running Vista, so I wiped the machine hoping it would solve this nasty problem. Imagine my surprise! Will be grateful for clues, advice, etc, please & thanks!

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• Drive Mapped On Amazon EC2 Instance Startup Disconnected After Logon

  - by jsn

  I am launching an Amazon EC2 instance (Windows Server 2012), and on startup (though User Data field), it runs this powershell script: <powershell> NET CONFIG SERVER /AUTODISCONNECT:-1 # clear all prior connections net use * /delete /y > C:\delLog.txt 2>&1 # mount new drive net use R: \\dbHost\share /user:username pass /persistent:yes > C:\useLog.txt 2>&1 ipconfig /all > C:\ipLog.txt </powershell> When it launches and I connect to it through RDP, it shows in explorer "Diconnected Network Drive (R:). If I double click it, error message displays "R:\ is not accesible. Access id denied". Normally, it would ask me for credentials to reconnect. I need for this drive to be connected through the duration of the instance. delLog.txt contents: You have these remote connections: T: \\dbHost\share Continuing will cancel the connections. The command completed successfully. useLog.txt contents: The command completed successfully. ipLog.txt contents as expected. The net use commands works fine by itself, it connects. Anyone have any idea what could be wrong? There is only one account on these machines - Administrator. It is a samba share to a Linux server on a private network.

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• Server Restart's and Respective Orders

  - by TheD

  EDIT:Not meaning to be disrespectful to any of the answers, but, the main question was whether rebooting a DC at the beginning of a cycle, then all the other servers, or rebooting it at the end once all the others are back online - is there a reason for doing it either way? I'm still not sure based on current responses. This will most likely seem like a fairly, maybe even stupid, question, but it's something I have been wondering about. As part of a regular process for clients servers are restarted remotely after patches and every client tends to have a similar order - but there always seems to be a small debate when it comes down to when do you reboot your DC. For example, 4 servers, 1 DC, 1xExchange, 1xBESX and 1xRandom, lets say it has some CRM software installed, is it best to reboot the DC first, then Exchange, then BESX and so on - or reboot all the servers, then reboot the DC last? - Perhaps it doesn't matter at all and it's just a case of how you have always done it. Would it change in a Hyper-V environment for example, with a physical DC, 1 VHost with all your servers virtualised on that Host? Rebooting the VHost and Virtual Machines first, then the DC at the end, or vice versa? Thanks!

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• I can't connect new Windows 7 PC to Mac iBook with OS 10.3.9

  - by Jeff Humm

  Help ! I have an old iBook wired to a router and a new PC linking wirelessly to same router. On the Mac I have 'seen' the PC but not been able to connect to it. On the PC, the Network and Sharing Centre lists 'IBOOK'. When I click on this, 'Windows Security' asks me to 'Enter Network Password', asking for User name and password. I have tried: 1) The user name and password of my admin account on the iBook. This returns a 'logon failure' message but lists the user name as [NAME_OF_PC\User Name], suggesting it was looking for the user name of the PC, not the Mac. 2) The user name and password of my account on the PC. This also returns a 'logon failure' message. 3) The user name of my account on the PC and the 'homegroup password' given to me by Windows when setting up the PC. This also returns a 'logon failure' message. Today I've tried connecting the two machines via a patch cable - still no joy. Can anyone help? It is 20 years since I wrestled with any OS other than Mac, and 10 years since I've done mich wrangling with the Macs, so please assume no knowledge! Thanks in advance,

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• Two NIC's 2 Internet Connections, 1 Windows Server 2008 RC2, Routing help required

  - by PJZ

  Hello, I have a Windows 2008 server and 4 other client machines on my home network. I have two internet connections. The main connection is setup with a home router and DHCP on that for all the clients on the network. The secondary connection is just a cable modem which is plugged directly into the server. Local Area Connection: This NIC has an external IP and is connected to the Cable Modem. Local Area Connection 2: This NIC has an internal IP (192.168.0.102) and allows access to all the internal computers. It also has internet access via the local router. So here lies the problem, I want to use the Cable connection on the server for the internet traffic (so that the traffic for server/clients are seperated) but I also need to maintain local access. I am wondering how to make it so that all the internet traffic goes via that NIC because at the moment it goes through the local NIC. As a secondary problem I would also like to forward the connection of one application used by the clients via the server and the cable/server internet because of poor routing for it on the main connection. This perhaps is something for another question though. Thanks for any help you can offer me. Regards PJ

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• Default Gateway solution on NAT'd network (best options)

  - by kwiksand

  I've recently changed a network from a bunch of machines exposed to the net on a network to a more security conscious Firewall-fronted network with a DMZ for public services. Everything's mostly working perfectly now, but I've got the old problem of NAT Loopback where a machine within the LAN wants to access a public service via the public/external IP. I've solved this problem previously in a small/SOHO environment simply using NAT loopback features of the router in use or a simple iptables rule to do the same, but I want to make sure I make the most resilient choice with the least concern. It seems I can: Use iptables as I've said to DNAT and MASQUERADE the change source/destination so the connection works correctly i.e iptables -A PREROUTING -t nat -d ip.of.eth0.here -p tcp --dport 8080 -j DNAT --to 192.168.0.201:8080 iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -p tcp --dport 8080 -d 192.168.0.201 -j MASQUERADE Use split DNS, with internal mappings for public IP's Potentially do some route nastyness by setting the Default Gateway to use a different externally exposed IP to then come back in the public route (messy) Someone mentioned putting the Default Gateway within the DMZ as well (on serverfault), but I can't find the post again. I'm sure this is a common issue for many with NAT'd networks, but I've not really seen the perfect solve all when it comes to fixing this problem. What is your opinion?

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• Passwordless SSH not working - keys copied and permissions set

  - by Comcar

  I know this question has been asked, but I'm certain I've done what all the other answers suggest. Machine A: used keygen -t rsa to create id_rsa.pub in ~/.ssh/ copied Machine A's id_rsa.pub to Machine B user's home directory Made the file permissions of id_rsa.pub 600 Machine B added Machine A's pub key to authorised_keys and authorised_keys2: cat ~/id_rsa.pub ~/.ssh/authorised_keys2 made the file permissions of id_rsa.pub 600 I've also ensured both the .ssh directories have the permission 700 on both machine A and B. If I try to login to machine B from machine A, I get asked for the password, not the ssh pass phrase. I've got the root users on both machines to talk to each other using password-less ssh, but I can't get a normal user to do it. Do the user names have to be the same on both sides? Or is there some setting else where I've missed. Machine A is a Ubuntu 10.04 virtual machine running inside VirtualBox on a Windows 7 PC, Machine B is a dedicated Ubuntu 9.10 server UPDATE : I've run ssh with the option -vvv, which provides many many lines of output, but this is the last few commands: debug3: check_host_in_hostfile: filename /home/pete/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug1: Host '192.168.1.19' is known and matches the RSA host key. debug1: Found key in /home/pete/.ssh/known_hosts:1 debug2: bits set: 504/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: Wrote 16 bytes for a total of 1015 debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug3: Wrote 48 bytes for a total of 1063 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/pete/.ssh/identity ((nil)) debug2: key: /home/pete/.ssh/id_rsa (0x7ffe1baab9d0) debug2: key: /home/pete/.ssh/id_dsa ((nil)) debug3: Wrote 64 bytes for a total of 1127 debug1: Authentications that can continue: publickey,password debug3: start over, passed a different list publickey,password debug3: preferred gssapi-keyex,gssapi-with-mic,gssapi,publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /home/pete/.ssh/identity debug3: no such identity: /home/pete/.ssh/identity debug1: Offering public key: /home/pete/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug3: Wrote 368 bytes for a total of 1495 debug1: Authentications that can continue: publickey,password debug1: Trying private key: /home/pete/.ssh/id_dsa debug3: no such identity: /home/pete/.ssh/id_dsa debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: ,password debug3: authmethod_is_enabled password debug1: Next authentication method: password

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• Basic multicast network performance problems

  - by davedavedave

  I've been using mpong from 29west's mtools package to get some basic idea of multicast latency across various Cisco switches: 1Gb 2960G, 10Gb 4900M and 10Gb Nexus N5548P. The 1Gb is just for comparison. I have the following results for ~400 runs of mpong on each switch (sending 65536 "ping"-like messages to a receiver which then sends back -- all over multicast). Numbers are latencies measured in microseconds. Switch Average StdDev Min Max 2960 (1Gb) 109.68463 0.092816 109.4328 109.9464 4900M (10Gb) 705.52359 1.607976 703.7693 722.1514 NX 5548(10Gb) 58.563774 0.328242 57.77603 59.32207 The result for 4900M is very surprising. I've tried unicast ping and I see the 4900 has ~10us higher latency than the N5548P (average 73us vs 64us). Iperf (with no attempt to tune it) shows both 10Gb switches give me 9.4Gbps line speed. The two machines are connected to the same switch and we're not doing any multicast routing. OS is RHEL 6. 10Gb NICs are HP 10GbE PCI-E G2 Dual-port NICs (I believe they are rebranded Mellanox cards). The 4900 switch is used in a project with tight access control so I'm waiting for approval before I can access it and check the config. The other two I have full access to configure. I've looked at the Cisco document[2] detailing differences between NX-OS and IOS w.r.t multicast so I've got some ideas to try out but this isn't an area where I have much expertise. Does anyone have any idea what I should be looking at once I get access to the switch? [1] http://docwiki.cisco.com/wiki/Cisco_NX-OS/IOS_Multicast_Comparison

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• How to set up QoS on ADSL router (terracom) for prioritizing browsing

  - by DBZ_A

  I want to configure the ADSL router which connects 10+ machines to the internet. I want to give maximum priority to browsing (ports 80,443) and set low priority for bittorrent etc.(port 42180) I have been experimenting with settings , but with no luck. There are three settings which confuse me, along with my understanding. 802.1 Priority - Related to LAN level, possible values 0-7 , higher numbers means higher priority. 'Mark traffic priority' - clueless about this. IPP/DS - IP Precedence - possible values 0-7 ; 6 & 7 are reserved, so set 5 for highest priority. Or when using DSCP - set 46 for highest priority. Please help me in getting this done... Similer question for another model of router here , but with less number of confusing options :) How to configure QoS on home router Update: from discussion on another thread, QoS can control only upstream traffic (from router to the internet) , while this may in turn affect downstream traffic rate, there is no direct control over data coming into the router.

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• samba share not on network after upgrading to Ubuntu 12.04LTS. [migrated]

  - by Sylvain Huard

  I just upgraded an old Ubuntu box to 12.04LTS (machine named A-Ubuntu). This is an upgrade not a format re-install. All the accounts and config were preserved. The basic setup is a local network with 2 Ubuntu machines (let say A-Ubuntu, B-Ubuntu) and a MAC (C-MAC). Before the upgrade, all of them could see each other by their names not only the IP address. The local network has a D-Link Router where everybody is connected with RJ-45 wired etherenet (not wi-fi). Since the A-Ubuntu upgrade, we can't see this machine name on the Network and its name is not on machine list in the D-Link router anymore. We can see it's IP address only. I can't access A-Ubuntu from the other two by its name but I can ping it with its address (192.168.0.109). From A-Ubuntu, I can connect and see the shared samba folders on B-Ubuntu and C-MAC. But from B-Ubuntu and C-MAc, I can't connect to A-Ubuntu. Correct me if I'm wrong but this tells me that Samba should be fine and the real problem is that A-Ubuntu does not advertise its name on the Network so the D-Link does not have it in its table so nobody else finds it. After a lot of googling, I see that it is the job of avahi and mdns to do so. Those packages are running, I checked multiple config files for samba, avahi, mdns to see as if it is like the examples on the WEB and also similar to what I find on the working B-Ubuntu machine. This is the same. I did multiple service restart with samba, avahi, remove the firewall to make sure it does not block the hostname broadcast. I rebooted multiple time to make sure the update I was making were effective. Still, Can't see the A-Ubuntu name on the network. Any idea what it can be?, Where to look next?

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• Windows AD DNS: Event ID 5504

  - by Chris_K

  Two of my AD controllers (both running DNS service) appear to be having a similar issue. Both are throwing lots of events in the DNS events that look like this: Event Type: Information Event Source: DNS Event Category: None Event ID: 5504 Date: 5/24/2010 Time: 11:51:38 AM User: N/A Computer: ALPHA Description: The DNS server encountered an invalid domain name in a packet from 76.74.137.6. The packet will be rejected. The event data contains the DNS packet. That will come with the same event, same time, with a packet from 76.74.137.7 as well. I know this is "Information" not an error, but since it is new and different it bothers me (yes, I fear unexplained change!) Both machines are running Windows 2003 R2 SP2. The DNS servers are not exposed to the internet. Both DNS servers are configured to use OpenDNS for Forwarders. For both servers, this started about a week ago. Any thoughts on: 1) should I be concerned? 2) how can I stop/fix this? To keep it interesting, I have a 3rd AD / DNS box. Same domain, different Active Directory site. Same forwarders, yet doesn't have this issue.

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• error creating MS Exchange distribution list: Active directory response: 00000005: SecErr: DSID-031521D0

  - by BabakBani

  We've migrated a client from google apps to an MS Exchange 2010 SP2 on-premise setup. The setup /prepareAD went well, and the software was installed with the Administrator account. We've used the Exchange Management Console to setup mailboxes and had to google up the appropriate workarounds such as going into each users Advanced Security Settings and selecting "include inheritable permissions from this object's parents", and changing their logon-to from specific machines to "all computers" so that they can connect to Outlook Web Access, and in turn so their Outlook 2007-2010 clients can connect to Exchange. Sending and receiving emails are working well. Now that all this is in place, we can create Dynamic Distrubution Lists with no problem, but as soon as we try and create a DISTRIBUTION LIST, either in the EMC or the Exchange PowerShell, we get an error. As the error message in the powershell is more verbose, I include this if anyone can suggest how we remedy this: [PS] C:\Windows\system32new-DistributionGroup -Name 'projects' -SamAccountName 'projects' -Alias 'projects' Active Directory operation failed on DC.cppe.local. This error is not retriable. Additional information: Access is denied. Active directory response: 00000005: SecErr: DSID-031521D0, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0 + CategoryInfo : NotSpecified: (0:Int32) [New-DistributionGroup], ADOperationException + FullyQualifiedErrorId : 1EA5CD3E,Microsoft.Exchange.Management.RecipientTasks.NewDistributionGroup

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• Connecting to server from remote machine

  - by Jannat Arora

  I wish to connect my machine to a server in some other city. For doing the same I am using the following command: mstsc -v ip_address_of_server remote desktop can't connect to remote computer for one of these reasons: 1) Remote access to server is not enabled. 2) Remote computer is turned off 3) Remote computer is not available on network. Make sure remote computer is turned on and connected to the network, and that remote access is enabled. As per previous posts I need to turn off my client computers firewall..which I have...but still it gives me the same message. Can someone please please help me out...so as to how i may resolve this?? I am really new to networking, etc. Also when i am pinging: ping ip_address_of server I am getting the following response: Reply from ip_address_of_server: destination host unreachable Also I did try on ubuntu with rdesktop...still its not been able to connect with it. Also i know there are other people who are able to connect their machines with the server remotely. So i guess its not working for me only. Also when I accessed the same machine through LAN I was able to do so.

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• Updating Dell PowerEdge firmware on Ubuntu?

  - by Shtééf

  The company I work for recently got hands on a batch of second hand PowerEdge SC1425 machines. We'd like to put these to good use. Our operating system of choice is Ubuntu Server 10.04 64-bit, which installs just peachy on this type of machine. Now I'd like to install the firmware updates from Dell, which are apparently marked as recommended. This includes the updates for the BIOS, the BMC, and possibly some other hardware. I find it incredibly difficult to locate the files on the Dell website, and install any of them on an Ubuntu system: I downloaded the file OM_6.2.0_SUU_A01.iso. I believe I've read that the SUU DVD should be able to update any recent PowerEdge. Is this correct? Is this the latest version? Besides the version number, does A01 have any meaning? Is this image bootable? (At the moment, I just nosed around with a loop device mount.) Running /bin/bash ./suu from the DVD, I get: # /bin/bash ./suu ./suu: line 262: ./java/linux/i386/bin/java: No such file or directory The file exists and is executable, though. But I cannot execute it directly from the shell either.

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• Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

  - by varesa

  I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas 8.0.4). Those two machines are connected to each other with Gigabit ethernet. The raid-z volume is divided into three parts: two zvols, shared with iscsi, and one directly on top of zfs, shared with nfs and similar. I ssh'd into the freeNAS box, and did some testing on the disks. I used ddto test the third part of the disks (straight on top of ZFS). I copied a 4GB (2x the amount of RAM) block from /dev/zero to the disk, and the speed was 80MB/s. Other of the iSCSI shared zvols is a datastore for the ESXi. I did similar test with time dd .. there. Since the dd there did not give the speed, I divided the amount of data transfered by the time show by time. The result was around 30-40 MB/s. Thats about half of the speed from the freeNAS host! Then I tested the IO on a VM running on the same ESXi host. The VM was a light CentOS 6.0 machine, which was not really doing anything else at that time. There were no other VMs running on the server at the time, and the other two "parts" of the disk array were not used. A similar dd test gave me result of about 15-20 MB/s. That is again about half of the result on a lower level! Of course the is some overhead in raid-z - zfs - zvolume - iSCSI - VMFS - VM, but I don't expect it to be that big. I belive there must be something wrong in my system. I have heard about bad performance of freeNAS's iSCSI, is that it? I have not managed to get any other "big" SAN OS to run on the box (NexentaSTOR, openfiler). Can you see any obvious problems with my setup?

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