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• Unable to logon using terminal server connection

  - by satch

  I have several W2K3 SP2 servers, admin TS enabled. I discovered this morning, I was unable to logon into some of them. I've a couple of Citrix servers in different farms, a SAP (IA64) app server and a cvs server. All of them show same sympthoms; remote connections are refused. I've been able to logon locally, and terminal server service is up, there are no users (so connections are not depleted). There are no errors in log in most servers. One of the Citrix ones, reported following errors: Event ID 50 Source TermDD Type Error Description The RDP protocol component X.224 detected an error in the protocol stream and has disconnected the client. and Event ID 1006 Source TermService Type Error Description The terminal server received large number of incomplete connections. The system may be under attack. Anyway, I suppose these errors appear because server isn't working, and Citrix users try to logon massively. (I nmap'ed server and port seems up). I've solved this problem rebooting before, but with so many servers affected it seems like a crappy workaround. Any idea about troubleshooting it properly? Thanks in advance

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• Can't connect to vsftpd on Ubuntu 10.04

  - by Johnny

  I started the vsftpd on Ubuntu 10.04, but can't connect to it. The error says(FTP Client): Status: Connecting to 124.205.xx.xx:21... Error: Connection timed out Error: Could not connect to server I've checked the server status, and vsftpd is running: $ ps ax | grep vsftpd 23646 ? Ss 0:00 /usr/sbin/vsftpd 23650 pts/1 S+ 0:00 grep --color=auto vsftpd port 21 is under listening as well: $ netstat -tlnp | grep 21 (No info could be read for "-p": geteuid()=1000 but you should be root.) tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN - I can connect to localhost: $ ftp localhost Connected to localhost. 220 (vsFTPd 2.2.2) Name (localhost:jlee): 331 Please specify the password. Password: 230 Login successful. Remote system type is UNIX. Using binary mode to transfer files. ftp> Here is iptables output $ sudo iptables -vL Chain INPUT (policy ACCEPT 191 packets, 144K bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 124 packets, 28502 bytes) pkts bytes target prot opt in out source destination What's the problem here?

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• Distributing processing for an application that wasn't designed with that in mind

  - by Tim

  We've got the application at work that just sits and does a whole bunch of iterative processing on some data files to perform some simulations. This is done by an "old" Win32 application that isn't multi-processor aware, so new(ish) computers and workstations are mostly sitting idle running this application. However, since it's installed by a typical Windows Install Shield installer, I can't seem to install and run multiple copies of the application. The work can be split up manually before processing, enabling the work to be distributed across multiple machines, but we still can't take advantage of multiple core CPUs. The results can be joined back together after processing to make a complete simulation. Is there a product out there that would let me "compartmentalize" an installation (or 4) so I can take advantage of a multi-core CPU? I had thought of using MS Softgrid, but I believe that still depends on a remote server to do the heavy lifting (though please correct me if I'm wrong). Furthermore, is there a way I can distribute the workload off the one machine? So an input could be split into 50 chunks, handed out to 50 machines, and worked on? All without really changing the initial application? In a perfect world, I'd get the application to take advantage of a DesktopGrid (BOINC), but like most "mission critical corporate applications", the need is there, but the money is not. Thank you in advance (and sorry if this isn't appropriate for serverfault).

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• What could cause an 101 Error in WAMP under Windows 7 ?

  - by Brayn

  Hey, I'be been using WAMP for local development for quite a while now but lately I've been getting an Error 101 message when I browse localhost sites. It's possible for this to have appeared after the last WAMP update but I'm not 100% sure on this. If I try again and again, after several page refreshes it works but it's really annoying! The exact error message is: Error 101 (net::ERR_CONNECTION_RESET): Unknown error. This is my configuration: OS: Windows 7 Apache: 2.2.11 PHP: 5.2.9-2 WAMP: 2.0 Also the local scripts connect to a remote MySQL server, they don't use the local MySQL(I don't know if it matters, just though I let you know). I've been looking into the apache logs and I've found the following. It seems that the apache server keeps restarting and I can't figure why: [Wed Oct 14 13:52:30 2009] [notice] Parent: child process exited with status 255 -- Restarting. [Wed Oct 14 13:52:30 2009] [notice] Apache/2.2.11 (Win32) PHP/5.2.9-2 configured -- resuming normal operations [Wed Oct 14 13:52:30 2009] [notice] Server built: Dec 10 2008 00:10:06 [Wed Oct 14 13:52:30 2009] [notice] Parent: Created child process 6784 [Wed Oct 14 13:52:31 2009] [notice] Child 6784: Child process is running [Wed Oct 14 13:52:31 2009] [notice] Child 6784: Acquired the start mutex. [Wed Oct 14 13:52:31 2009] [notice] Child 6784: Starting 64 worker threads. [Wed Oct 14 13:52:31 2009] [notice] Child 6784: Starting thread to listen on port 80. [Wed Oct 14 13:52:32 2009] [notice] Parent: child process exited with status 255 -- Restarting. [Wed Oct 14 13:52:33 2009] [notice] Apache/2.2.11 (Win32) PHP/5.2.9-2 configured -- resuming normal operations [Wed Oct 14 13:52:33 2009] [notice] Server built: Dec 10 2008 00:10:06 [Wed Oct 14 13:52:33 2009] [notice] Parent: Created child process 3572 [Wed Oct 14 13:52:33 2009] [notice] Child 3572: Child process is running [Wed Oct 14 13:52:33 2009] [notice] Child 3572: Acquired the start mutex. [Wed Oct 14 13:52:33 2009] [notice] Child 3572: Starting 64 worker threads. [Wed Oct 14 13:52:33 2009] [notice] Child 3572: Starting thread to listen on port 80. Also I've checked Windows Firewall and disabled any other protection that I have on this computer with no improvement. Thanks!

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• Quickly set up a Windows Server and automatically install and configure software

  - by Chris

  Yesterday I spent far too much time downloading and installing software on Windows Server 2008. I only had to install a simple server for SQL Server 2008 Express using Microsoft's Web Platform Installer, then configure it to enable remote connections. Everything had to be attended, wasting my time. On a Linux system, this would be trivial to automate, but this is Windows. I do this very rarely, but in the future I would like to make this take as little time as possible. I could do a disc image with everything I installed and configured, but is there a better way? I know nothing of advanced deployment techniques on Windows. Ideally I would like to be able to remotely re-install the OS, or have an unattended install (which I know is possible). Any tips to make the software I need easier to and install and configure with minimal interaction necessary would be helpful. I don't expect everything I asked for to be possible and easy to do. Basically, If any part of it can be done quicker or at least without user input, that's what I'm looking for.

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• Can any iSCSI NAS appliance replicate / clone a LUN to an external drive?

  - by Boden

  I would like to backup using Windows Imaging to some kind of NAS appliance. I believe this will require the NAS to support iSCSI. I would then like the appliance to support the replication of the iSCSI LUN to an external eSATA or USB disk connected directly to the appliance. I've found plenty of NAS appliances that can do iSCSI and replicate to an external drive, but none that I've found thus far can do both at once. That is, the devices can do iSCSI, but then the replication feature doesn't work. The idea here is to backup to an appliance located in a secure office far away from the server room. Offsite backups to external hard drive could be managed from the appliance. The benefits of such a setup would be: 1) very unlikely that fire or random theft would affect both server-room backup and "remote" backup appliance 2) offsite backups could be managed by multiple trusted people without granting access to server room 3) Windows imaging provides poor man's deduplication, so each backup volume can contain a decent backup history. I understand why this would be a non-trivial thing to implement, but I'm wondering if such a thing exists? Preferably a tabletop, low to medium cost device. Alternative solutions welcome. NOTE: I'm backing up very few but very large files, so file replication is not a good option.

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• Enabled Network Discovery on Server, and now VNC and Squeezebox clients don't work

  - by Mike Hanson

  I've recently setup a Windows Server 2008. It's running an email server, Squeezebox server, MS SQL Server, etc. I'm doing remote maintenance with UltraVNC. I had everything working fine. Then the server needed to access a network share on another machine, and I was prompted to turn on network discovery, which I did. I chose the Home rather than Public option. Since doing that, some things have stopped working, while others are still fine. Shared folders and the the Email services (ports 25 and 110) are still accessible. VNC (port 5900) and Squeezeboxes (port 9000) no longer work. Here's what I've tried to try to solve the problem: Checked the network discovery settings, to see if anything looked strange. Checked the firewall settings, and those ports appear to be open. Also in the firewall settings, the entries for Private domain Network Discovery were all on, but the Domain/Public ones were off. I tried turning those on. In the services, turned on Function Discovery Resource Publication and SSDP Discovery. Any other suggestions?

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• openvpn problem

  - by Jared Voronik

  I have a problem with openvpn. I have already setup openvpn sucessfully on some other servers in the past (basic configuration, nothing special). On this server, I used the same config file, but for setting up nat iptables -t nat -A POSTROUTING -s 10.4.0.0/24 -o eth0 -j MASQUERADE doesn't work. It gives error: iptables v1.3.5: can't initialize iptables table `nat': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. How do I fix this error? Also, if I can't fix this error, can I do bridging instead of routing? I have only 1 interface, and I can connect to remote server only via ssh (and need to avoid reboots if at all possible) so if briding means a whole ethernet card has to be devoted to the openvpn (and no other servers) then briding is out, otherwise I can use briding. Do you know of a simple, step by step guide to configure openvpn briding (just simple openvpn server and clients that can access internet through vpn server, nothing fancy)?

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• What are problems and pitfalls with a public facing Active Directory

  - by Ralph Shillington

  The situation that i'm faced with is this: We plan on using a number of server applications hosted on Amazon EC2 machines, mainly Microsoft Team Foundation Server. These services rely heavily on Active Directory. Since our servers are in the Amazon cloud it should go without saying (but I will) that all our users are remote. It seems that we can't setup VPN on our EC2 instance -- so the users will have to join the domain, directly over the internet then they'll be able to authenticate and once authenticated, use that token for accessing resources such as TFS. on the DC instance, I can shut down all ports, except those needed for joining/authenicating to the domain. I can also filter the IP on that machine to just those address that we are expecting our users to be at (it's a small group) On the web based application servers, I imagine all we need to open is port 80 (or 8080 in the case of TFS) One of the problems that I'm faced with is what domain name to use for this Active directory. Should I go with "ourDomainName.com" or "OurDomainName.local" If I choose the latter, does that not mean that I'll have to get all our users to change their DNS address to point to our server, so it can resolve the domain name (I guess I could also distribute a host file) Perhaps there is another alternative that I'm completely missing.

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• Network connection keeps dropping - bad hardware?

  - by Bill Sambrone

  Hello all, I've into a bit of a wall with a client of mine. In an office of 20 people, he is the only one who experiences broken connections to his mapped network drives. I have everyone set up with about 6 mapped drives, all pointing to the same server (no DFS), and everyone else can access them lightning fast. The environment consists of a mix of Windows 7 and XP machines, all 32-bit. The server holding the data everyone is mapping to is running on Server 2008 R2, and is a domain controller. We recently swapped out their old 10/100 switch for a shiny new Dell PowerConnect gigabit switch. We have also replaced an old dying Sonicwall with a shiny new one. Everything is running on an ESX host except for the DC, where everyone is getting data from. In my client's office, we have done the following: Swapped out his computer (Win7 and XP box) Swapped out the desktop switch in his office Removed the desktop switch in his office Changed out the network cable going to the wall Ran 'net config server /autodisconnect:-1' on the server Disabled remote differential compression on his current Win7 box When we swapped out his network cable, everything seemed fine for about 4 days. Normally I would get a phone call a couple times per day letting me know that Outlook has crashed (there is a 9GB PST living on the server he is always connected to), or that his software he is running from his L drive has crashed. I almost thought I had this solved, but after we rebooted the DC the other night he all of a sudden couldn't stay connected to his mapped network drives for more than 10 minutes. When I ran 'net use' from the command prompt, it listed all the network drives where were randomly in a state of 'OK', 'Disconnected', or 'Reconnecting'. What else should I try? Maybe there is bad wiring in the wall, patch panel, or a bad port in the new switch I have in the server room?

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• Problem with Outlook 2010 (SMTP AUTH LOGIN)

  - by Filipe YaBa Polido

  **IGNORE THIS QUESTION - SOLVED WITH A PYTHON SCRIPT available at: http://yabahaus.blogspot.com I have to connect one customer Outlook 2010 to a remote server on which I have either no right, neither way to talk to the sysadmin. This is the thing, after installing and reviewing the logs on Wireshark: Outlook Express: HELO machine AUTH LOGIN username base64 encoded password base64 encoded mails go through. Outlook 2010: HELO machine AUTH DIGEST-MD5 response from server Outlook sends just a * AUTH LOGIN password base64 encoded So... I can send mails in the same domain, but can't send outside, it gives me a relay denied message. My point is... Why the h**l Outlook 2010 doesn't send the username AND the password?! It can never login the right way :| With other versions of Outlook it works fine, and with OE works great, it auths and allows to send mail to a different domain. I've googled and nothing worked. I'm pretty sure that I'm not alone with this one. My last resort will be to configure a local proxy/server that relays to the original one :| Any help would be appreciated. Sorry my bad english as is not my natural language. Thanks.

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• ubuntu 9.04 pptp broken after a power failure

  - by kevin42

  I have a small Ubuntu 9.04 router setup as a NAT box and a PPTP server. After a power failure everything except the PPTP server still works. A windows client gets to "registering your computer on the network" but then says Error 742: The remote computer does not support the required data encryption type. I did some research and I think the problem is with the ppp_mppe module. When I try to run 'modprobe ppp_mppe' it hangs indefinitely. What would cause this hang? Any ideas how I can troubleshoot this further? Thanks for the help! UPDATE: I am still having the problem, however I have found some more information. When the first user tries to connect to pptp, the process list shows modprobe sha1 running, and one instance of modprobe ppp_mppe for each connection attempt. If I killall modprobe at this point the next connection attempt works, and everything is fine until the next reboot. I'm planning to do a clean install at some point in the future but I'd really like to get to the real cause of this.

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• Hyper-V vss-writer not making current copies

  - by Martinnj

  I'm using diskshadow to backup live Hyper-V machines on a Windows 2008 server. The backup consists of 3 scripts, the first will create the shadow copies and expose them, the second uses robocopy to copy them to a remote location and the third unexposes the shadow copies again. The first script – the one that runs correctly but fails to do what it's supposed to: # DiskShadow script file to backup VM from a Hyper-V host # First, delete any shadow copies of the drives. System Drives needs to be included. Delete Shadows volume C: Delete Shadows volume D: Delete Shadows volume E: #Ensure that shadow copies will persist after DiskShadow has run set context persistent # make sure the path already exists set verbose on begin backup add volume D: alias VirtualDisk add volume C: alias SystemDrive # verify the "Microsoft Hyper-V VSS Writer" writer will be included in the snapshot # NOTE: The writer GUID is exclusive for this install/machine, must be changed on other machines! writer verify {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de} create end backup # Backup is exposed as drive X: make sure your drive letter X is not in use Expose %VirtualDisk% X: Exit The next is just a robocopy and then an unexpose. Now, when I run the above script, I get no errors from it, except that the "BITS" writer has been excluded because none of its components are included. That's okay because I really only need the Hyper-V writer. Also I double checked the GUID for the writer, it's correct. During the time when the Hyper-V writer becomes active, 2 things will happen on the guest machines: The Debian/Linux machine will go to a saved state and restore when done, all fine. The Windows guests will "creating vss snapshop-sets" or something similar. Then X: gets exposed and I can copy the .vhd files over. The problem is, for some reason, the VHD files I get over seems to be old copies, they miss files, users and updates that are on the actual machines. I also tried putting the machines in a saved sate manually, didn't change the outcome. I hope someone here has an idea of how to solve this.

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• Win Svr 2003 DHCP Bad Addresses

  - by VinceM

  After looking at other posts I still can figure this out. I'll start at the beginning... I inherited this network and I'm not the most knowledgeable about networking... We have a AD DHCP Server that is also our DNS server, We were having some VPN issues (on the same server) and my boss decided to disable routing and remote access, which cleared the settings. We couldn't get it set back up correctly so we rolled back to a backup drive they created a number of months ago. Since rolling back I've had Bad_Address listings in DHCP and there is a number of duplicate records in the DNS Forward Lookup Zones. We have less than 50 devices on the network but I have over 90 Bad Addresses showing. This server is currently running but we get IP address conflicts all the time on pretty much all the computers. I have had people do release and renew but it didn't help... I have also deleted and re-added the scope to no avail either. Any help or ideas would be greatly appreciated and I apologize if I missed another post that has information to help. Thanks, Vince

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• Trouble printing to local printer when connected to VPN with split-tunneling enabled

  - by Marve

  I'm a volunteer network admin for a multi-tenant non-profit office space. One of our new tenants uses a VPN to connect to remote resources using RRAS and Small Business Server 2008. They also have a local network printer for the workstations in our office. When connected to the VPN, they cannot print to the local printer. I informed their network admin that they need to enable split-tunneling to fix this. Their network admin enabled split-tunneling, but apparently printing still didn't work. He told me that I need to open port 1723 on our office firewall to allow it to work. I'm just a novice administrator and not familiar with RRAS, but this doesn't sound right to me and I haven't been able to find anything on the web to validate it. Additionally, my understanding of split-tunneling is that it is handled entirely by the VPN client and should work irrespective of firewall settings. Is my understanding of the situation incorrect? What steps should I take to resolve this problem?

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• Effective Permissions displays incorrect information

  - by Konrads

  I have a security mystery :) Effective permissions tab shows that a few sampled users (IT ops) have any and all rights (all boxes are ticked). The permissions show that Local Administrators group has full access and some business users have too of which the sampled users are not members of. Local Administrators group has some AD IT Ops related groups of which the sampled users, again, appear not be members. The sampled users are not members of Domain Administrators either. I've tried tracing backwards (from permissions to user) and forwards (user to permission) and could not find anything. At this point, there are three options: I've missed something and they are members of some groups. There's another way of getting full permissions. Effective Permissions are horribly wrong. Is there a way to retrieve the decision logic of Effective Permissions? Any hints, tips, ideas? UPDATE: The winning answer is number 3 - Effective Permissions are horribly wrong. When comparing outputs as ran from the server logged on as admin and when running it as a regular user from remote computer show different results: All boxes (FULL) access and on server - None. Actually testing the access, of course, denies access.

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• Laptop authentication/logon via accelometer tilt, flip, and twist

  - by wonsungi

  Looking for another application/technology: A number of years ago, I read about a novel way to authenticate and log on to a laptop. The user simply had to hold the laptop in the air and execute a simple series of tilts and flips to the laptop. By logging accelerometer data, this creates a unique signature for the user. Even if an attacker watched and repeated the exact same motions, the attacker could not replicate the user's movements closely enough. I am looking for information about this technology again, but I can't find anything. It may have been an actual feature on a laptop, or it may have just been a research project. I think I read about it in a magazine like Wired. Does anyone have more information about authentication via unique accelerometer signatures? Here are the closest articles I have been able to find: Knock-based commands for your Linux laptop Shake Well Before Use: Authentication Based on Accelerometer Data[PDF] Inferring Identity using Accelerometers in Television Remote Controls User Evaluation of Lightweight User Authentication with a Single Tri-Axis Accelerometer Identifying Users of Portable Devices from Gait Pattern with Accelerometers[PDF] 3D Signature Biometrics Using Curvature Moments[PDF] MoViSign: A novel authentication mechanism using mobile virtual signatures

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• Accessing a shared folder in Windows Server 2008 R2.

  - by Triztian

  Hello all, seems my involvement with computers has grown and I've found my self in the need to access a shared folder on a server. I've read some documentation and managed to set up the folder as a share, for this I created a local group and for now just one local user that has access to the share, the folder is in the public user folder and it's permissions should be (and I believe they are) read/write. The problem is that I can't connect from a remote machine I mean I don't know how the way it should be accessed, the server has a public IP and we use it also as a host to our website I don't know if that affects it though, the folder will be used as the "keeper" for the QuickBooks company files and has the database server manager installed. I've tried setting up a VPN Connection to the but no success. The server has a domain name a "http://www.example.com" that redirects to our website, I am unsure if it could be accessed that way, also the share has a location displayed when I right-click properties Heres what I've tried Setting up a VPN Connection (Windows Vista and 7) Got to the point where I got asked for credential and entered the user I created (which is not an admin) but I got a "Connection fail error 800" I suppose this is because in the domain field I entered the servers workgroup. right-click add network connection (Windows 7) Went through the wizard until I reached the point of entering the location, tried many things, the name in the share's properties(\\SOMETHING\Share), the http://www.example.com , the IP address I'm quite unfamiliar with this, so I have my guesses: Since the group and user are local they do not have access to the folder. The firewall in the server is blocking my connection. Anyways, any help and guidence is truly appreciated.

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• Windows 7 comments field missing when browsing network

  - by Toymangenie

  I have just purchased three Windows 7 Professional Dell 64-bit PCs for testing prior to upgrading our company’s 120+ PCs from Windows XP Professional. The setup is a standard domain with a Windows Server 2003 32-bit server. We name each PC XP1 to XP150 so that when users join or leave, I don’t have to rename the PC. We use the Description field to allocate the user’s name to each PC. We also have a share set up on each PC using the user’s name. When I browse the network using Windows Explorer in XP, I get a useful display. The left pane showing the PC number and the right pane showing NAME and COMMENTS So, for example I would see: XP01 Fred Bloggs (Each PC on a new row.) The right pane is my main tool for administering the network. I can easily see the PC number and the name of the user. However, in Windows 7, this seems to have been thrown out of the window and replaced with fields that I do not need and in my case always display the same info. "Name", "Category", "Workgroup", "Network Location" In my case the Name column gives the PC number (XP10) etc and all three other columns display identical useless information. So I can’t see who is using XP10. When I am in “help desk” mode, I would naturally ask the user’s name and use my remote desktop client to view their screen. The user isn’t aware of their PC name, so I am finding it impossible to match the user name with a PC number. Any ideas how to overcome this "by design" change to Windows 7?

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• Slow Local Network, Windows 7, Snow Leopard, WiFi/Wired

  - by WerkkreW

  I am experiencing really poor local network performance in my home. I was recently using a Linksys WRT54G Router with DD-WRT on it, and a couple comparable Linksys-G PCI cards for connectivity but decided to upgrade hoping it would help with my performance issues. The computers in my house are connected as follows: Comcast Business Class Commercial 25mbps/10mbps (Verified) D-Link DGL-4500 Wireless N Router Windows 7x64 - D-Link DWA-552 Wireless-N Windows 7x64 - D-Link DWA-552 Wireless-N Mac Mini 10.6.2 - AirPort Extreme N Playstation 3, Hard Wired Xbox 360, Hard Wired Essentially the problem is very specific. Web browsing and uploading/downloading files from the internet is fine, more than fine. But if I want to say, Stream a video from one of my Windows 7 computers to my PS3, or copy a large video file between either of the PC's or the Mac, I get a consistent 500-900Kbps throughput at the high end. If I open my network browser, or try to browse my homegroup the response time is horrible. Both of my Windows computers are showing Strong wireless signals with a connection speed of 300Mbps. I know I can never expect to achieve anything near those speeds, but 500Kbps? Here is what I have tried so far: Enabled Single mode N-only and N/G Only on router WPA2 with AES Encrpytion Disabled "Remote Differential Compression" in Windows 7 Disabled TCP "Auto-Tuning" Used other software for file copies such as "Teracopy" I am at the end of my rope. Unfortunately I live in a 75 year old home with plaster walls, so hard-wiring my entire house isn't really an option I can handle right now. Any ideas to help me get decent speed when transferring files across my network would be greatly appreciated.

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• cannot connect to vpn server (error 721)

  - by callmeblessed

  Hi I got 2 internet connections in my computer. One is using 3.5G HSDPA modem (vodafone huawei e220) and the other using mobile phone (cdma zte c261). Both are using different ISP and i have both. at the moment, i can connect to my office vpn using the HSDPA modem one. But when i tried to use cdma modem (dial up - mobile phone modem), i am just able to get "verifying username and password" and then after a few minutes it display error : Error 721 The Remote Computer didn't respond. I tried to ping into my office ip address, it got good result but still cannot connect to the vpn. I tried to turn off all my firewall (i'm using commodo) and has no response as well. In my cdma mobile phone modem Network connections I tried to allow iNternet connection sharing as well ... and turn on all Internet Protocol TCP/IP, File & Printer Sharing & Client for microsoft networks. But all of my effort has no effect. How to fix this problem ? note: my office using windows vpn as well. thank you .

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• ProCurve ACL to prevent a subnet from leaving the switch

  - by kce

  I have a single HP ProCurve 2610 in a remote location that is connected in with the rest of the network via SHDSL. There are two Layer-3 networks on this segment. ACLs are setup to deny one subnet (192.0.2.0/24) from ever being able to leave the switch by virtue of being applied to port attached to the upstream connection. The other subnet should be permitted to freely leave the switch. Both subnets are on the same VLAN. Unfortunately SFlow very clearly show broadcast traffic from 192.0.2.0/24 on the upstream connection. ProCurve ACLs are not my strong suit but I feel like I'm missing something very simple here. ip access-list extended "Filter for Camera Network" deny ip 192.0.2.0 0.0.0.255 0.0.0.0 255.255.255.255 log permit ip 0.0.0.0 255.255.255.255 0.0.0.0 255.255.255.255 exit interface 24 name "DSL - UPLINK" access-group "Filter for Camera Network" in exit Unless I am mistaken traffic from 192.0.2.0/24 should be dropped as it crosses the uplink port (int 24) whereas all other traffic will be permited by the following default allow rule. What exactly am I missing here? EDIT: Firstly, why do you have two subnets contained in the same VLAN? Because that's how it was configured by a previous administrator and while it makes conceptual sense that a single subnet is "mapped" to a single VLAN there's no technical constraint that I am aware of that makes this have to be the case. Instead of filtering inbound traffic on your uplink, you should be filtering outbound traffic. The HP2600 series can only filter inbound traffic on interfaces. Should I change my filter to deny any to 192.0.2.0/24?

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• Failure to connect to admin share pops up dialog

  - by Jan

  I'm having an issue with a curious error message when accessing the administrative share on a remote machine. Specifically, the client is logged in as the domain administrator on the machine A, and runs some code that tries to access the admin share on B (a domain member). The access is done in .NET, along these lines (though I am not sure if the method of access makes a difference): string path = @"\\B\admin$"; if (Directory.Exists(path)) { try { path += @"\temp\"; if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } path += "myfile_remote"; File.Copy("myfile", path); Now, on some machines this fails. That is not a big problem as we have a fallback. I'd like to know why but it is not the real issue. The problem is that running this piece of code causes a dialog box to pop up for the logged-in user on B, saying "network error trying to access \\B\admin$\temp\myfile_remote. Contact the network administrator and ask for the correct permissions". Unfortunately, it is a foreign language Windows so I'll spare you all posting a screenshot. It is skinned like a standard Windows dialog box. Why exactly is that dialog box popping up for the user and is there anything I can do about it? Edit to add: B is a Windows 7 Enterprise installation. The client is not aware of any GPO policies being installed. There is AV from Trend Micro installed.

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• Problem with Outlook 2010 (SMTP AUTH LOGIN)

  - by Filipe YaBa Polido

  I have to connect one customer Outlook 2010 to a remote server on which I have either no right, neither way to talk to the sysadmin. This is the thing, after installing and reviewing the logs on Wireshark: Outlook Express: HELO machine AUTH LOGIN username base64 encoded password base64 encoded mails go through. Outlook 2010: HELO machine AUTH DIGEST-MD5 response from server Outlook sends just a * AUTH LOGIN password base64 encoded So... I can send mails in the same domain, but can't send outside, it gives me a relay denied message. My point is... Why the h**l Outlook 2010 doesn't send the username AND the password?! It can never login the right way :| With other versions of Outlook it works fine, and with OE works great, it auths and allows to send mail to a different domain. I've googled and nothing worked. I'm pretty sure that I'm not alone with this one. My last resort will be to configure a local proxy/server that relays to the original one :| Any help would be appreciated. Sorry my bad english as is not my natural language. Thanks.

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• Timely automatic unexpected reboot on ubuntu desktop

  - by ahmad

  We have a remote linux server (ubuntu desktop). The system log indicates the system has been restarted on the timely fashion. Here is a part of the last output: ut pts/0 192.169.50.2-sta Sat Nov 24 22:17 still logged in reboot system boot 2.6.32-21-generi Sat Nov 24 22:04 - 22:17 (00:13) ut pts/0 server.local Sat Nov 24 21:36 - crash (00:27) reboot system boot 2.6.32-21-generi Sat Nov 24 15:55 - 22:17 (06:21) reboot system boot 2.6.32-21-generi Fri Nov 23 18:02 - 22:17 (1+04:14) reboot system boot 2.6.32-21-generi Fri Nov 23 10:39 - 22:17 (1+11:38) reboot system boot 2.6.32-21-generi Fri Nov 23 04:18 - 22:17 (1+17:59) reboot system boot 2.6.32-21-generi Fri Nov 23 03:57 - 22:17 (1+18:20) reboot system boot 2.6.32-21-generi Thu Nov 22 20:38 - 22:17 (2+01:38) reboot system boot 2.6.32-21-generi Thu Nov 22 11:13 - 22:17 (2+11:03) reboot system boot 2.6.32-21-generi Thu Nov 22 08:12 - 22:17 (2+14:05) reboot system boot 2.6.32-21-generi Wed Nov 21 11:16 - 22:17 (3+11:00) reboot system boot 2.6.32-21-generi Tue Nov 20 22:36 - 22:17 (3+23:41) reboot system boot 2.6.32-21-generi Tue Nov 20 14:12 - 22:17 (4+08:05) reboot system boot 2.6.32-21-generi Tue Nov 20 11:32 - 22:17 (4+10:44) reboot system boot 2.6.32-21-generi Tue Nov 20 01:52 - 22:17 (4+20:25) reboot system boot 2.6.32-21-generi Tue Nov 20 00:22 - 22:17 (4+21:55) reboot system boot 2.6.32-21-generi Mon Nov 19 17:27 - 22:17 (5+04:50) It looks the system is set to be restarted at 22:17. Can anyone guide me why this happens? Thanks in advance.

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