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  • identify a router that cuts certain port

    - by Sergiks
    Is there a way to identify which particular router between me and some server blocks connections on certain port? I am in a hotel in Thailand, where they have recently changed some settings in their equipment, and now I cannot reach any of my servers in Europe and USA by SSH / port 22. More traditional ports like 80 or 21 are open. traceroute command shows each particular router in the middle. But is there a way to identify one that filters out port 22?

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  • Network external hard drive reports not enough free space

    - by mzhang
    I'm running an Ubuntu (10.04) Samba server on a local network. The server has a 50GB internal drive with only 24MB free. I've shared a folder /samba from that drive. I also have a 1TB NTFS external hard drive mounted to the system. There is a symbiotic link from the Samba shared folder on the nearly-full internal drive to the plenty-of-free-space external drive (i.e. /samba/external_hd). I wish to copy a 3.25GB folder into the (remote) external hard drive, via a Mac (10.6.8). The Mac reports (correctly) that there's 24MB free on the server, and so will not let me copy the folder on the Mac over to the external drive (dragging the folder into /samba/external_hd), failing with a "server does not have enough free space" error. However, it seems that I can still scp the folder into the external drive, via the symbolic link. Is there a reason as to why this is happening (and are there any ways to prevent it)? Is this even good practice (to mount a drive and link into the directory)?

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  • A duplicate name has been detected on the TCP network

    - by MSedm
    When I installed my domain controller and DNS, I had 2 NIC on the server. Both NIC has its own IP address. NICs are not teamed, they are seperate and ip address are in the same subnet. Both IP address are now registered in the DNS. i found them in Forward and reverse lookup zone. Everything working ok except the following error in the event log. "A duplicate name has been detected on the TCP network......" Now I have realized that this is because of the second NIC. My question is if i disable the second NIC, what happen to those DNS record assiciated with the second ip address? How do I remove all the DNS recored for the disabled NIC? There are A record, some record with the name (same as parent folder), PTR record and may be more. How do i disable second NIC and remove all the associated DNS recoreds? Please help.

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  • Does Mac OS X throttle the RATE of socket creation?

    - by pbhogan
    This may seem programming related, but this is an OS question. I'm writing a small high performance daemon that takes thousands of connections per second. It's working fine on Linux (specifically Ubuntu 9.10 on EC2). On Mac OS X if I throw a few thousand connections at it (roughly about 16350) in a benchmark that simply opens a connection, does it's thing and closes the connection, then the benchmark program hangs for several seconds waiting for a socket to become available before continuing (or timing out in the process). I used both Apache Bench as well as Siege (to make sure it wasn't the benchmark application). So why/how is Mac OS X limiting the RATE at which sockets can be used, and can I stop it from doing this? Or is there something else going on? I know there is a file descriptor limit, but I'm not hitting that. There is no error on accepting a socket, it's simply hangs for a while after the first (roughly) 16000, waiting -- I assume -- for the OS to release a socket. This shouldn't happen since all prior the sockets are closed at that point. They're supposed to come available at the rate they're closed, and do on Ubuntu, but there seems to be some kind of multi (5-10?) second delay on Mac OS X. I tried tweaking with ulimit every-which-way. Nada.

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  • Does Mac OS X throttle the RATE of socket creation?

    - by pbhogan
    This may seem programming related, but this is an OS question. I'm writing a small high performance daemon that takes thousands of connections per second. It's working fine on Linux (specifically Ubuntu 9.10 on EC2). On Mac OS X if I throw a few thousand connections at it (roughly about 16350) in a benchmark that simply opens a connection, does it's thing and closes the connection, then the benchmark program hangs for several seconds waiting for a socket to become available before continuing (or timing out in the process). I used both Apache Bench as well as Siege (to make sure it wasn't the benchmark application). So why/how is Mac OS X limiting the RATE at which sockets can be used, and can I stop it from doing this? Or is there something else going on? I know there is a file descriptor limit, but I'm not hitting that. There is no error on accepting a socket, it's simply hangs for a while after the first (roughly) 16000, waiting -- I assume -- for the OS to release a socket. This shouldn't happen since all prior the sockets are closed at that point. They're supposed to come available at the rate they're closed, and do on Ubuntu, but there seems to be some kind of multi (5-10?) second delay on Mac OS X. I tried tweaking with ulimit every-which-way. Nada.

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  • VMWare Player 5.0 Upgrade - Bridged Networking No Longer Works

    - by Syndog
    I've been using VMWare Player 4 on my Windows 7 PC, running my VMs under a bridged networking configuration without any problem. I settled on bridged networking two reasons... I often use VMs to host web applications for test purposes. I never could get NAT to work for me anyway, but no love lost, considering reason #1. Now that I've upgraded to VMWare Player 5, the situation has completely reversed. In other words, bridged networking no longer works at all, and NAT does. Has anyone else come across this? Any ideas on getting bridged networking to work again? This happens with both Windows and Linux guest OSes. VMWare Tools has been fully updated. I've tried the usual vmnetcfg.exe utility fix, to no avail.

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  • Will resetting the computer account in AD(2003) break the shares?

    - by Thoreau
    Had a power outage last night, still cleaning up from that. I have a file server that doesn't know it's part of the domain (getting the error: windows cannot connect to the domain either because the domain controller is down). I read that "resetting" the machine account the bring it back into the domain will do the trick. Since this is the file server for the entire office, I would like to be sure that I won't bork the umpteen number of shares on this server. Thanks!

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  • Proper set up shared folders for users

    - by user221486
    First I would like to say thanks for helping, and I have huge problem with proper set up permission for shared folders. I have Windows 7 x64 ent. - name: backupfb - added to domain with shared folder on drive e: (e:\backup) 50 clients/laptops with TSM Tivoli fastback for workstations who save files on shared folder And I need to configure proper permission for my shared folders that only owner of folder can access to their folders. Folder structure is: e:\backup <- shared as a "backup" folder \\backupfb\backup\ e:\backup\BackupAdmin <-- directory is used by the Tivoli Storage Manager FastBack for Workstations client to download revisions and configurations. Nodes require read-only access to these directories e:\backup\RealTimeBackup <-- enable client accounts to create directories that are only accessible by the account that created them. As a result, the directory that contains data for a node is not created until that node connects to the server. So permission should look like that (take from instructions): Inheritable permissions from object`s parents are DISABLE Permission entries: \\backupfb\backup\BackupAdmin Allow Users Read, Execute This folder, subfolders, and files Traverse Folder / Execute Allow List Folder / Read Data Allow Read Attributes Allow Read Extended Attributes Allow Delete subfolders and files Allow Delete Allow Read Permission’s Allow Allow Administrators Full Control This folder, subfolders, and files Both folders have enabled option "apply these permissions to objects and/or containers within this container only" Here everything works fine \\backupfb\backup\RealTimeBackup <<-- Allow Administrators Full Control This folder, subfolders, and files Allow CREATOR OWNER Full Control This folder, subfolders, and files (from domain) Allow Users Special This folder only Traverse Folder / Execute Allow List Folder / Read Data Allow Read Attributes Allow Read Extended Attributes Allow Create Files / Write Data Allow Create Folders / Append Data Allow Delete subfolders and files Allow Read Permission’s Allow Allow OWNER RIGHTS* Full Control This folder, subfolders, and files Here I have huge problem with CREATOR OWNER Im able to set FULL CONTROL but I can only apply "Subfolders and files only". When I change props. to "This folder, subfolders and files" and save its change to "Subfolders and files only" So I try use icacls to set up permissions @echo off takeown /F E:\backup\ /R /A for /D %%i IN (E:\backup\RealTimeBackup*) DO icacls E:\backup\RealTimeBackup\%%~nxi /grant:r cloud\%%~nxi:F /T /C pause but after that user are able to create just one folder in \backupfb\backup\RealTimeBackup\userfolder but problem is with subfolders In log i have: FBW5022E Unable to access the specified file Explanation: The file specified is unable to be accessed. Possibly spelled incorrectly, or bad path, or permissions. User response: Ensure the user has the proper permissions for the file and directories involved andthat the file and directory exist Any idea ?? pls help ;-) thanks

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  • Shares Not working

    - by Crash893
    I'm running a ms server 2012 box acting as a file server, I've set up 4 shares (IT SECURITY PUBLIC HR) to start out with each share has its corresponding group as full permissions to the folder however when I access the server \server\it it says i don't have permissions. Public has NTLM AUTH as its full read/write and i can't even get into that Clearly im doing something wrong but im very new to windows server and im not sure how to start trouble shooting.

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  • OSX : Setup for filestorage in medium business

    - by Franatique
    In our office every machine runs OSX. In search of an ideal storage and sharing solution we decided to let OSX Server handle all account information and auth requests whereas an 7TB QNAP provides NFS shares. All shares are published as mounts in the companywide LDAP. As it turns out, handling permissions in this situation is very clumsy (e.g. inherit permissions on newly created files). Unfortunately using NFS4 in combination with ACLs did not solve the problem. As a possible solution I set up a iSCSI connection between QNAP and the machine running OSX Server which in turn serves the LUN as AFP share. Permission handling works like a charm for this setup. Although I am a bit concerned about the performance of this setup. As we are a fast growing company we expect the solution to serve at least 100 clients while using files aprox. above 100MB each. Are there any known drawbacks of this solution?

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  • Enterprise level Ticketing and inventory system reccomendations [closed]

    - by TrackingSystem
    My company is sort off at a stand still when it comes to our technician ticketing and inventory system. We currently use Numara TrackIt! - which isn't cutting it to say the least. Dell recommended KACE, but it's web based which is what we would like to avoid. We need a good ticketing and inventory system with the following: Server/Client setup Client supports XP/Windows 7 Ent. Web Based as well as Client is a plus Technician ticketing Active Directory integration Inventory System (Asset tag tracking etc/PO tracking) Exchange integrated - when tickets are made you have an option to send to the requester. Something that will scale well Please, if anyone is a Systems Admin or has knowledge regarding use of a great ticketing system please let me know. We have a large international corporation - price honestly isn't an issue. Keep in mind this will be mainly used for technicians to create tickets, enter inventory(track PCS) and possible even an option to track purchase orders. We want an enterprise level ticketing system with these capabilities please help! Thank you.

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  • Access denied for user who has full access to some files in their own folder

    - by steve02a
    I have a very similar case as this user: Access denied on some files on Win2008R2 DC share This is on a windows 2008 R2. The user has Win7 pro. The user has their own home folder on the server. Every file, except one, the user can read/write/modify at their own will. No problems - except this one file. She gets "access denied" I can open it (as domain admin). Another user can open it (because she's in the domain admin group). I did run the AccessEnum tool and the read/write permissions are all identical for all files. So, I can't explain why the user can't open this one single file. Out of all her files in sub-folders and such. No problems. This one file is causing a headache. What do you think could be wrong here?

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  • Increasing link speed on OpenVPN (bandwidth)

    - by Mike
    I have bought a tunnel service by using OpenVPN. For a year I've had 10 Mbps max upload/download speed but now I've bought an additional 20 Mbps making the available total bandwidth 30 Mbps for me. On their homepage there are some controls available for me, for example to restart the tunnel. I've done that. It also says that the speed has indeed been upgraded to 30 Mbps on their page. I also got an email that said they have upgraded the speed. However after I reboot my machine, and OpenVPN has started up and is running as usual, when I look at the Windows Task Manager (opens when pressing CTRL+SHIFT+ESC) in the "Networking" tab I still have a link speed of only 10 Mbps. Two adapters are listed: Local Area Connection 4 (10 Mbps) and Local Area Connection 5 (100 Mbps). LAC5 is my "real" adapter, I have a 100 Mbps Internet connection if I don't use a tunnel. LAC3 is the virtual adapter used by OpenVPN. The problem is that it is still showing 10 Mbps even though I have upgraded to 30 Mbps. How can I fix this?

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  • Slow network interaction between 2 kvm host machines

    - by VirtualNoob
    We have 2 physical machines, Host1 is a CentOS 6.4 kvm host and hosts ~7 kvm VMs all running Ubuntu 12.04 - all of this runs perfectly. Recently we've added a 2nd host system, host2, again a CentOS 6.4 kvm host with a view to running another couple of VMs and providing some failover against host1 should it be required. Both physical machines reside in the same cabinet in our DC, and are on the same subnet - let's say host1: 1.1.1.64 and host2: 1.1.1.81. Both have their gateway set to the DC gateway of 1.1.1.254 with no hardware firewall in between. On each machine, I have 4 NICs that are bonded together to form a single interface, which is then bridged to allow the VMs to access the network. All of the VMs are online, and all of them can successfully ssh into the hosts without any delay. Both systems can access the internet fine, and I can ssh into both systems from home without any issues. However, there is a real delay when attempting to ssh from host1 to host2 (or vice versa) and this obviously means that any action required on host2, that is controlled by host1 either takes forever or results in failure due to timeout. In the interest of keeping this post short, I've put my ifcfg files into a pastie: http://pastie.org/8081648 I've tried both adding a firewall rule in each machine for the other, and also disabling the firewall entirely, so that can't be the issue. I've tried troubleshooting this myself but can't seem to get to the bottom of it. Any help or advice would be appreciated. Thanks in advance.

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  • Printer in a AD double side print problem

    - by Spidfire
    ive got a printer in my Active directory but its standard set to double sided printing but the problem is the printer doesnt support that so you have to switch it manualy Ive found the setting for the user but it is automatically set to the original value if you reboot Where can i find the setting in the active directory ? the printer is a :HP Color LaserJet CP1510 Series PCL 6 (its possible that there is a script for this but i dont know where to look)

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  • XP Clients can't copy to networkshare

    - by chewbacca76
    i have a windows 2003 domain where i have strange problem. One of our file shares is on a 2003r2 domain controller, xp clients trying to copy files on the share are always getting the error error copying file or folder filename could not be copied. path too long while windows 7 clients work fine. Nothing unusal is found in the eventlog on both the server and the client. It doesn't matter if i access the share by fqdn or ip, the path is including filename shorter than 20 characters i.e. \path\share\file.txt Copying files to other servers is fine. Reading from the shares is ok too. Happened from one day to the other, one windows update that was installed this day (kb2736233) was removed but nothing changed. thanks for any tips

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  • Secure filesharing protocol for fileserver

    - by Hugo
    I'm setting up a fileserver, and I want lots of clients to easily access it. Up to now I've always used SSHFS to share between different PCs, but since I'm setting up a single fileserver, I'm looking for other common alternatives. Up to now I've seen: AFS: It seems it has no security, traffic is unencrypted, so it would require an SSH tunnel. If I'm to use SSH, I'd just use SSHFS. NFS: Same as above. Also, setting up the server is not so straighforward, it doesn't seem to be KISS enough - at least not for my liking. SMB: Same as AFS. It also seems not to be too well documented, and technically, seems a bit poor. It also seems the protocol isn't formally standardized. SSHFS has security, but as a downside, requieres every user to have an account on the server - there's no way to make a certain directory PUBLIC either. I don't think it has locking, and isn't very fault-tolerant. Are there any alternatives I've missing?

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  • how to disable to automatic wireless interface up in ubuntu? [closed]

    - by Surjya Narayana Padhi
    On my laptop I have a built in wireless card and I got one external connected via usb. By ifconfig command I saw both the cards connects to internet and gets IP. eth1 - the interface my laptop has in-built wlan1 - I have connected externally via usb. Now I applied "sudo ifconfig eth1 down" so that i can use only wlan1. But this eth1 goes down for sometime and then come up again automatically. So I am not able to test my externally usb connected wifi adapter. Can anyone suggest me way to disable eth1 interface?

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  • Hyper-V Manager - Host Access During a Catastrophe

    - by LonnieBest
    How can I ensure that I can always have Hyper-V Manager access to a Hyper-V server, even in the event that the Active Directory Server is down (in a domain-login environment)? Background: The one that came before me, set up the company's servers as virtual machines on top of a host running Hyper-V Server 6.1 (7601) Service Pack 1. For managing Hyper-V, he installed Window 7 onto a virtual machine (run on the same host) with Hyper-V Manager installed. When the (virtual) Active Directory server (run on this same host) is rebooted, during that reboot, I'm unable to RDP into the Windows 7 virtual machine, and I'm therefore unable to access Hyper-V Manager when the Active Directory server is down. I suspect I can't login because I can't authenticate with the Active Directory Server. I'm going to install Hyper-V Manger onto some addition manager's workstations, but how can I ensure they'll have access in a catastrophe where Active Directory authentication isn't possible?

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