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• PowerConnect 3548p SNTP and web interface not working

  - by Force Flow

  I have been unable to get SNTP and access to the web interface working properly on a Dell PowerConnect 3548p. In the logs, this message appears over and over again: 04-Jan-2000 20:19:29 :%MNGINF-W-ACL: Management ACL drop packet received on interface Vlan 172 from 172.17.0.3 to 172.18.0.10 protocol 17 service Snmp 172 is the management vlan. 172.17.0.3 is the DNS server 172.18.0.10 is the switch's IP address. The DNS server and the switch are located on different subnets and separated by routers. I am unable to access the web interface of the switch from the 172.17.x.x subnet. I can only access the web interface of the switch if I am accessing it from the 172.18.x.x subnet. There is also a managed linksys switch on the 172.18.x.x subnet on the 172 vlan, which has no problem with SNTP. I can also access it from the 172.17.x.x network. So, it stands to reason that this is not a firewall or routing issue, but with the 3548p switch. I suspect the issue is with management permissions/ACLs on the 3348p switch, but that's about as much as I've been able to determine so far. Any ideas?

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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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• 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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• Performance data collection for short-running, ephemeral servers

  - by ErikA

  We're building a medical image processing software stack, currently hosted on various AWS resources. As part of this application, we have a handful of long-running servers (database, load balancers, web application, etc.). Collecting performance data on those servers is quite simple - my go-to- recipe of Nagios (for monitoring/notifications) and Munin (for collection of performance data and displaying trends) will work just fine. However - as part of this application, we are constantly starting up and terminating compute instances on EC2. In typical usage, these compute instances start up, configure themselves, receive a job from a message queue, and then get to work processing that job, which takes anywhere from 15 minutes to over 8 hours. After job completion, these instances get terminated, never to be heard from again. What is a decent strategy for collecting performance data on these short-lived instances? I don't necessarily need monitoring on them - if they fail for whatever reason, our application will detect this and handle re-starting the job on another instance or raising the flag so an administrator can take a look at things. However, it still would be useful to collect information like CPU (user, idle, iowait, etc.), memory usage, network traffic, disk read/write data, etc. In our internal database, we track the instance ID of the machine that runs each job, and it would be quite helpful to be able to look up performance data for a specific instance ID for troubleshooting and profiling. Munin doesn't seem like a great candidate, as it requires maintaining a list of munin nodes in a text file - far from ideal for an environment with a high amount of churn, and for the short amount of time each node will be running, I'd rather keep the full-resolution data indefinitely than have RRD water down the data over time. In the end, my guess is that this will require a monitoring engine that: uses a database (MySQL, SQLite, etc.) for configuration and data storage exposes an API for adding/removing hosts and services Are there other things I should be thinking about when evaluating options? Perhaps I'm over-thinking this, though, and just ought to run sar at 1-minute intervals on these short-lived instances and collect the sar db files prior to termination.

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• Connect by Wifi to Sql Server from another computer

  - by Bronzato

  I try to connect by Wifi to Sql Server with Sql Server Management Studio from another computer but it failed. I have a computer with Windows Seven & Sql Server 2008 (lets say the server computer). Next to it, I have a fresh installed computer with Windows Seven & Sql Server Management Studio (let's say the client computer). What I do on the server computer: configure firewall by enabling port 1433 enabled network protocols (TCP/IP) inside Sql Server Configuration Manager checked "Allow remote connections to this server" on server properties in Sql Server Management. started Sql Server Browser restarted services (Sql Server Browser is stopped but I think it is not neccessary, isn't it?) Next, I successfully tested a ping on the port 1433 from my client computer with a tool named tcping (ex: tcping 192.168.1.4 1433). But I still cannot connect from my client computer to Sql Server on my other computer. Ok, something new on this problem: until now, I successfully connected to my "server computer" with Management Studio. What I do is typing the computer name in the server name field in the connection window of Management Studio. My previous (failed) attempt was to type the computer name followed by the instance of sql server (ex: COMPUTER_NAME\SQL2008). I don't know why I only have to type the computer name... Nevermind. Now my new challenge is to succeed connecting my VB6 application to this remote database located on my "computer server". I have a connection string for this but it failed to connect. Here is my connection string: "Provider=SQLOLEDB.1;Password=mypassword;User ID=sa;Initial Catalog=TPB;Data Source=THIERRY-HP\SQL2008" Any idea what's wrong? Thanks

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• CentOS 5 VPN Server won't work

  - by Miro Markarian

  I have a CentOS 5 server configured to be both a L2TP server and a PPTP server + a radius server for hosting the AAA. My problem is that, the L2TP works great and I can connect to it, but can't connect to PPTP and every-time it ends up with error #619 when it gets to the verifying username and password section. Here is the log I got from /var/log/messages Dec 17 07:40:02 serverdl pptpd[8570]: CTRL: Client 5.52.247.62 control connection started Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: Starting call (launching pppd, opening GRE) Dec 17 07:40:03 serverdl pppd[8571]: Plugin radius.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: RADIUS plugin initialized. Dec 17 07:40:03 serverdl pppd[8571]: Plugin radattr.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: RADATTR plugin initialized. Dec 17 07:40:03 serverdl pppd[8571]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded. Dec 17 07:40:03 serverdl pppd[8571]: pptpd-logwtmp: $Version$ Dec 17 07:40:03 serverdl pppd[8571]: pppd 2.4.4 started by root, uid 0 Dec 17 07:40:03 serverdl pppd[8571]: Using interface ppp0 Dec 17 07:40:03 serverdl pppd[8571]: Connect: ppp0 <--> /dev/pts/2 Dec 17 07:40:03 serverdl pptpd[8570]: GRE: read(fd=7,buffer=80515e0,len=8260) from network failed: status = -1 error = Protocol not available Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: GRE read or PTY write failed (gre,pty)=(7,6) Dec 17 07:40:03 serverdl pppd[8571]: Modem hangup Dec 17 07:40:03 serverdl pppd[8571]: Connection terminated. Dec 17 07:40:03 serverdl pppd[8571]: Exit. Dec 17 07:40:03 serverdl pptpd[8570]: CTRL: Client 5.52.247.62 control connection finished Just yesterday when I hadn't set up the L2TP yet PPTP was working great but then I uninstalled it and removed all it's config from /etc/* and installed L2TP first and then installed PPTP after it. and then it stopped to work. I believe it must be a radiusclient issue because both of the PPTP and L2TP services use radius to authenticate. And another thing I think must be the issue is that when assigning IPs to the PPP interfaces, I have done the following config. Is that right? For L2TP: localip 10.10.10.1 remoteip 10.10.10.2-254 For PPTP: localip 10.10.9.1 remoteip 10.10.9.2-254

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• EventID 1058 Code 5, Sysvol is subdir of Sysvol - how to fix?

  - by nulliusinverba

  I have been trying to resolve this error, like many others: The processing of Group Policy failed. Windows attempted to read the file \domain.local\SysVol\domain.local\Policies{3EF90CE1-6908-44EC-A750-F0BA70548600}\gpt.ini from a domain controller and was not successful. Group Policy settings may not be applied until this event is resolved. This issue may be transient and could be caused by one or more of the following: a) Name Resolution/Network Connectivity to the current domain controller. b) File Replication Service Latency (a file created on another domain controller has not replicated to the current domain controller). c) The Distributed File System (DFS) client has been disabled. Error code: 5 = Access Denied. The incredibly helpful post is this one (http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/2003_Server/A_1073-Diagnosing-and-repairing-Events-1030-and-1058.html). Quoting from this post: HERE IS A LIST OF POTENTIAL PROBLEMS THAT CAN LEAD TO 1030 AND 1058 EVENT ERRORS: --Sometimes the permissions of the file folders that contain Group policies (the Sysvol folder) can be corrupted. --Sometimes you have problems with NetBIOS: --Sometimes the GPO itself is corrupt, or you have a partial set of data for that GPO. --Sometimes you may have problems with File Replication Services, which almost always indicates a problem with DNS --Sysvol may be a subfolder of itself: Sysvol/Sysvol I have the problem listed where sysvol is a subfolder of sysvol. The directory structure is: -sysvol -domain -staging -staging areas -sysvol (shared as "\\server\sysvol") -domain.local -ClientAgent -Policies -scripts Interestingly, the second sysvol folder is the one that is shared as "\server\sysvol". This makes me confident this is the issue with the permissions and error code 5. Also interestingly, my server 2008 R2 servers can see it fine - my server 2008 servers cannot, and get the error. This is consistent across all my servers. This latter fact makes me uncertain what I need to do to fix this up. Do I, e.g., simply move the shared sysvol folder up a level to replace the non-shared one? Any help greatly appreciated. Cheers, Tim.

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• Transfering Files to server IP and port

  - by Mason

  I need to transfer files from my local computer on windows 7 to a server running linux. I access the server with putty through ssh at a specific IPv4 address and port number. I've attempted using the pscp command from my local computer but was denied access by the server. "Fatal: Network error: Connection refused" c:>pscp test.csv userid@**IPv4_Addres***:Port# /path/destination_file_name. Either the server blocks all pscp attempts from unauthorized users (most likely my laptop included) or I used the command incorrectly. If you have experience using this command, where exactly will the file get transfered to, I'm assuming that the path destination starts at my home directory in the server. Also if you have any other alternative methods of transfering the files let me know. Update 1 I have also tried using WinSCP however I got permission denied for that as well, it looks like the server will not let me upload or save files. Solved I had a complete lapse of memory and forgot about sudo (spent too much time with scripts the last 2 months), so I was able to change the permissions to allow external editing. Thanks for all the help guys!

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• Adding 2nd DC to the domain from a different subnet over VPN.

  - by EagerToLearn

  I'm in the process of adding a second DC to our domain and just want to make sure I have all the steps right before proceeding. Info: DC1 is 2008 R2 Standard. DC2 is 2008 R2 Standard. Network1 is 192.168.39.x/24 Network2 is 10.0.0.x/24 VPN is Sonicwall. The 2 DC's will be at two different sites, but the networks are connected by hardware VPN. (Sonicwall). The main DC server will be on the 192.168.39.0/24 network. The 2nd DC will be on 10.0.0.0/24. Here are the steps I plan to take; please let me know if I'm missing anything. Part 1: AD Sites and Services on DC1, create a new site and subnet for DC2. (Or should I create a new one for both?) (Can I use the default IPSiteLink and not change anything in there other than refresh timer?) Part 2: Point the DNS of DC2 to DC1. Run /forestprep and /domainprep (on both, or just DC1?). Dcpromo and select "Additional Domain Controller for Existing Domain". Then continue with normal steps with default locations for databases. EDIT: Didn't realize this was like reddit and required two skipped lines to skip one :P EDIT 2: When DCPromo-ing DC2, do I need to have "Append primary and connection specific DNS" and "Append parent suffixes of the primary DNS suffix" checked?

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• wireless router - configuring for low-latency, high traffic environment

  - by Mark C

  Hey all, I have a few questions about configuring a router to achieve low-latency, high speed throughput on a local area network that is not connected to the internet. I've read up on some stuff, but thought I would solicit some opinions here on what I've found and what I want to know.... Turn off SSID broadcast - it produces extraneous packets that all clients receive and reply (?) to. Not a huge deal, but it may help a bit. Mixed-mode off - I should attempt to have all devices using the same standard (e.g. 802.11n) and turn mixed-mode off. Any thoughts on security? Does having WEP or any of the WPA variants actually increase latency? Nothing super secure is going over this LAN so if turning security off made things better, that'd be cool. Any other thoughts or things to focus on to create the low latency environment I'm trying to go for would be great. Links to webpages and papers are also cool. I'm open to go through a bunch of stuff. Thanks in advance!

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• using gmail as email relay for sendmail

  - by Nikita

  I used to be able to send emails using a gmail account & sendmail configured using one of the guides on the Internet, for example: http://appgirl.net/blog/configuring-sendmail-to-relay-through-gmail-smtp/ This is a small server and I've recently moved it to a different house. And sendmail has stop working. The only thing different in the network setup is a new router. What is happening: In the log files, I see the following error: ...stat=Deferred: smtp.gmail.com: No route to host When I run from the command line: strace sendmail -f A -t B -u "Subject" -m "Message" -tls=yes ssl=yes -s smtp.gmail.com:587 -xu A -xp XYZ It hangs on this call: recvfrom(3, "m0\201\203\0\1\0\0\0\0\0\0\4ares\3lan\0\0\34\0\1", 8192, 0, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.1.254")}, [16]) = 26 close(3) = 0 time(NULL) = 1339997943 open("/etc/localtime", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=3477, ...}) = 0 fstat64(3, {st_mode=S_IFREG|0644, st_size=3477, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb76ff000 read(3, "TZif2\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\4\0\0\0\0"..., 4096) = 3477 _llseek(3, -24, [3453], SEEK_CUR) = 0 read(3, "\nEST5EDT,M3.2.0,M11.1.0\n", 4096) = 24 close(3) = 0 munmap(0xb76ff000, 4096) = 0 socket(PF_FILE, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 3 connect(3, {sa_family=AF_FILE, path="/dev/log"}, 110) = 0 send(3, "<18>Jun 18 01:39:03 sendmail[268"..., 96, MSG_NOSIGNAL) = 96 nanosleep({60, 0}, So it looks like at some point it tries to resolve the DNS name, but I don't have anything running on 53, so it dies out and then just hangs. The other interesting thing is that msmtp works just fine on the same server. Update: ares in strace output is actually the name of my server, but .254 IP address is the address of the router. Could anyone tell me why this is happening or what further steps can I take to investigate the issue? Thanks!

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• No LAN and SMB access, and Explorer not responsive, when using a second connection

  - by Lorenzo

  I apologize if this is a duplicate question, I know that there are several questions about multiple connection (LAN + LAN and LAN + dialup) but I haven't been able to find one that fits my scenario. I'm still using Windows XP on my corporate laptop, and I'm connected to the corporate LAN via Ethernet. The LAN NIC has a public IP address, although not accessible externally, obtained via the corporate DNS server. This connection is firewalled and requires a proxy to access Internet. To access Internet sites blocked by the corporate firewall, I use my smartphone via USB tethering. It is seen as a new LAN interface, and I get a private IP address (class 192.168..). There are two problems: The LAN is not accessible, as the default gateway goes to the tethering NIC. I'd like to solve this, but I can live with it. My PC becomes unresponsive if I use Windows Explorer to view local files, or even when I open the start menu. I guess that this is caused by attemps to connect to a mapped network drive. But I disabled the "Client for Microsoft Networks" in the tethering NIC. Why the system still hangs? Of course if I disable the Ethernet NIC, Explorer stops hanging. If you need further details, add a comment. Thanks!

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• httpd.config Easy Apache WHM CentOS

  - by jessie

  First let me explain how I got to this situation. I run a Streaming Video Site. Videos are about 100-250MB in size at any given time there are 500 people on the site. So I guess that would make then static. Recently My site started getting really slow and the only way to fix it temporarily was to restart apache. Now there was no change in traffic that could have caused this. My site is not being attacked. My hosting company recomended to implement mpm_mod and suPHP. They did that by using Easy Apache in WHMS. Then everything was working fine but a little slow. I researched around and to my understanding that mpm will do that but be more table. I was told that installing FastCGI would speed things up just enough. Well that made everything worse. The site is slow and time's out. I used WHM and took off fastCGI but its still the same, it seems like everything i do as of now nothing changes. I even did a roll back on the htconfig file but that didn't work. I'm not sure how to fix this. and my hosting network guy wont be able to touch the problem until Tuesday. I have root access.

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• Keepalived for more than 20 virtual addresses

  - by cvaldemar

  I have set up keepalived on two Debian machines for high availability, but I've run into the maximum number of virtual IP's I can assign to my vrrp_instance. How would I go about configuring and failing over 20+ virtual IP's? This is the, very simple, setup: LB01: 10.200.85.1 LB02: 10.200.85.2 Virtual IPs: 10.200.85.100 - 10.200.85.200 Each machine is also running Apache (later Nginx) binding on the virtual IPs for SSL client certificate termination and proxying to backend webservers. The reason I need so many VIP's is the inability to use VirtualHost on HTTPS. This is my keepalived.conf: vrrp_script chk_apache2 { script "killall -0 apache2" interval 2 weight 2 } vrrp_instance VI_1 { interface eth0 state MASTER virtual_router_id 51 priority 101 virtual_ipaddress { 10.200.85.100 . . all the way to . 10.200.85.200 } An identical configuration is on the BACKUP machine, and it's working fine, but only up to the 20th IP. I have found a HOWTO discussing this problem. Basically, they suggest having just one VIP and routing all traffic "via" this one IP, and "all will be well". Is this a good approach? I'm running pfSense firewalls in front of the machines. Quote from the above link: ip route add $VNET/N via $VIP or route add $VNET netmask w.x.y.z gw $VIP Thanks in advance. EDIT: @David Schwartz said it would make sense to add a route, so I tried adding a static route to the pfSense firewall, but that didn't work as I expected it would. pfSense route: Interface: LAN Destination network: 10.200.85.200/32 (virtual IP) Gateway: 10.200.85.100 (floating virtual IP) Description: Route to VIP .100 I also made sure I had packet forwarding enabled on my hosts: $ cat /etc/sysctl.conf net.ipv4.ip_forward=1 net.ipv4.ip_nonlocal_bind=1 Am I doing this wrong? I also removed all VIPs from the keepalived.conf so it only fails over 10.200.85.100.

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• Office365 Exchange: Cannot open shared two calendars in Outlook

  - by Mark Williams

  The problem: Outlook won't open the calendars on another user's mailbox and and a room mailbox, even when users have permission. Note: This problem is affecting more than one account on more than one machine. So I have a room mailbox and a personal mailbox on Exchange, both with shared calendars. There is a security group called "Scheduling Users" that have editor rights on both of these calenders. The room mailbox was created using PowerShell, per the instructions posted online (http://help.outlook.com/140/ee441202.aspx). Sharing worked on both of these folders initially. Users can still access these folders using OWA. So on to the problem. When users try to open these calendars in Outlook they receive one of the following messages. The set of folders cannot be opened. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance. Cannot open this item. Cannot open the free/busy information. The attempt to log on to Microsoft Exchange has failed. What I have tried so far: Resetting the permissions on both of the mailboxes. I deleted the security group permissions on both mailboxes, applied the change, then waited a bit and gave the permissions back. Deleted the OST file of the shared calendar from the Outlook data directory That is all I have been able to find online. Any thoughts? I have been going back and forth with the Office365 support folks for a while and they seem stumped too.

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• Weirdly high ping on direct ethernet connection?

  - by Antriel

  I bought new Lenovo IdeaCentre H430 pc and I'm having problem with high pings. Windows 7 with on-board realtek NIC. Fresh install, fully updated, drivers installed from included CD. When I start pinging router (direct 1Gb ethernet connection, 1 hop), pings start at <1ms (which is fine) and after a while they jump to 300-1000ms. I loaded up live ubuntu to test if the problem might be in HW. It's not, in ubuntu pings were always <1ms. I also noticed that when I start using connection somehow, pings go down to 1ms, but go back up when I stop using it (tested by accessing live camera feed on LAN). Power Options set to max performance. I disabled Interrupt Moderation on the NIC, didn't help. I tested it in the safe mode with networking, same problem there. It slows down our client-server based programs and I have no idea what's causing it. All I could google up was that disabling Interrupt Moderation would help, it didn't though. Anyone had similar problems? tl;nr: Computer is giving high pings to router when idle and normal pings when network is under load, it slows down our software significantly.

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• VirtualBox management interface unreliability

  - by Arlen Cuss

  I'm using VirtualBox 3.2.8_OSE with 20 VMs running, and everything's going fine. I find that if I hammer the VBoxManage interface, all sorts of interesting things happen, usually necessitating either a restart of the VM in question, or of all VMs. For instance, if I use VBoxManage guestcontrol execute to run processes, after a few hours of using it maybe once or twice a minute on any given VM, it'll mysteriously start reporting VERR_NOT_IMPLEMENTED and refusing to do anything—sometimes trying to restart /usr/sbin/VBoxService on the VM itself will get it back in working order, but often it won't, and in the meantime, no data can be collected using VBoxManage. Such data includes the VM's IP, so if I hadn't recorded it earlier, I'm usually in trouble and have no option but to portscan the network for it, or kill the VM's process on the host manually and restart it. This one I haven't narrowed down yet, but it seems that even using VBoxManage guestproperty get (to retrieve a machine's IP) frequently and rapidly is enough to cause all VMs' management interfaces to die. The processes are still running fine, but VBoxManage reports them all as "powered off". In the meantime, another process somewhere in the system seems to have decided that their being powered off means they need to be powered on again, and suddenly I have 2x the number of VBoxHeadless processes running than I used to. Has anyone else seen behaviour like this? Is there any workaround? This is a serious impediment to my work, as I've had to resort to a lot of (hacky) caching of data and rate-limiting how often I call VBoxManage, just in case I accidentally bring 20 VMs to their knees.

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• Windows 7 sharing folder from command line, selecting users and triggering the "Apply" of changes

  - by clintp

  I have a drive that doesn't get mounted until after I log in. (A Truecrypt thumbdrive device, and no, I'm not making it a "System Favorite" to get around this.) I'd like to construct a batch file to share it once I've gotten it mounted because the sharing info doesn't seem to stick through a reboot. From the GUI, I'd go into the folder Properties-Sharing. And then in Advanced Sharing I'd pick the name to share it as. And then under the "Share..." button I'd pick the users and the permissions I want to grant them. After "Apply" there's a pause -- I'm not sure what's happening here, but the dialog says "Sharing Items..." -- and then everything is okay. From the command line, I've done: net share MyFolder=F:\MyFolder cacls F:\MyFolder /G FirstUser:F cacls F:\MyFolder /G OtherUser:F And this almost works. I can see the share on the network then, but nobody has permissions to do anything. If I go into the GUI and change anything (and I can see my command-line changes in there already) and press "Apply" I get the: "Sharing Items.... This may take a few minutes" Dialog... and then Voila! It works. I get the "Your folder is shared" dialog with the command-line changes I made, along with the GUI change that I made to trigger the "Sharing Items..." dialog. Everything's peachy. Is a service being restarted? Which one? What's triggering the sharing to take effect? And -- more importantly -- how do I do it from the command line?

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• Ubuntu 12.10 64bit host reboots when trying to install any guest system using VirtualBox

  - by gts123

  I am having a really nasty problem with VirtualBox as everytime I try to install any guest OS(using ISO file as CD for installation media), the installation starts normally but as soon as it is about to start either installing to virtual hard drive or loading(e.g. as LiveFS) it causes the host system to reboot abruptly. Config is as below: Host system: Ubuntu 12.10 64bit - Intel® Core i7-2640M CPU @ 2.80GHz × 4 Virtualbox version: 4.1.18_Ubuntu r78361 Guest OS systems tried: 32bit version of FreeBSD 9, Debian 6, Tails 0.14 VM setup Tried to have the minimal setup necessary just in case it would avoid for each system to make sure I'd avoid conflicts, but to no avail. I've tried different values and combinations of the below but the problem still persists: Shared Clipboard: Disabled Show in fullscreen/seamless: Disabled Remember runtime changes: DIsabled Base Memory: 2048 MB Chipset: PIIX3 IO APIC: Disabled EFI: Disabled Absolute Pointing device: Disabled Processor(s): 1 CPU PAE/NX: Disabled VT-x/AMD-V: Disabled Video Memory: 12 MB 3d/2d acceleration: Disabled Storage IDE COntroller: PIIX3 (same as chipset instead of PIIX4) Use host I/O cache: No Audio: disabled Network adapter: NAT USB controller: disabled No shared folder Also another sideeffect of the reboot is that it appears that it does not log any information in the error log files; not making things any easier. Please help.

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• Synchronising a remote folder with a local one.

  - by Workshop Alex

  I am using a network disk (that's connected to my router by USB) to store several data files. A simple .NET application that I've created is supposed to read and modify these data files. However, some security issues are preventing this application to access these files directly. (Actually, these have been built-in to my application on purpose since it's not going to support NAS disks.) Since this disk is shared with several computers, I just want to have a simple synchronisation method, which will copy the files to a local folder where3 my application can access them. And, once modified, it should send back the modified files to the NAS disk again. I have two options: 1) Build a second application to do my own synchronisation. 2) Find some build-in function inside Windows 7 Ultimate which can do this for me. Option 2 is preferred. Option 1 is something I can do easily, if need be. I don't need third-party tools. (Still, feel free to add some references to good tools, although I won't accept them as answers.) Basically, is this possible with Windows 7 and if so, how?

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• Can't access Port 80 from external

  - by dewacorp.alliances

  Hi there I have configuration like this: NETGEAR MODEM LINKSYS ROUTER SERVERS In the modem, I've setup as bridging and all the traffic is controlling by this ROUTER. Prior to this setup, I can access website from external (port 80) plus exchange servers (mail) and https. But now with this configuration, I can only send/receive using Exhcange servers and access OWA (Outlook web access using port 443) .... and no internal websites from outside. This is my config for LINKSYS ROUTER Application | Start | End | Protocol | IP Address Ms Exchange | 25 | 25 | Both (TCP/UDP) | 192.168.100.8 Internets | 80 | 80 | Both (TCP/UDP) | 192.168.100.11 SSL | 443 | 443 | Both (TCP/UDP) | 192.168.100.8 Exchange | 110 | 110 | Both (TCP/UDP) | 192.168.100.8 192.168.100.11 is a UBUNTU web server that running the apache which controlling the virtual name (extranet, cms, test) to redirect to the different servers. As you can see, the home internet is only allowing public IP address. Now I test this schenarion in internal network work nicely. For instance. If I type in extranet.XXX.local it goes to the right applicatios or if I try CMS.XXX.local again it goes to the right one. I also asked to ISP just in case if they are blocking the inbound port 80 for unknown reason. They said no. So I didn't understand why this happens. I suspect the configuration that I have between MODEM ROUTER but I counldn't work what it is. I don't have a documentation of previous settings and I don't know if there is a port that I need to open as well. I am appreciated your comment

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• Ubuntu 10.04->10.10 in failed state - how to recover?

  - by Harvey

  I was running Ubuntu 10.04 and attempted to upgrade to 10.10. I have a really slow connection (DSL 128kbits/sec) and copying the upgrade files took about 26 hours. I of course let it run unattended. When I came back, I notice the following 3 dlgs: (1) "Could not install the upgrades The upgrade has aborted. Your system could be in an unusable state. A recovery will run now (dpkg -- configure -a)." (2) "gpk-update-icon Distribution upgrades available maverick 10.10 (stable) [more information] [Do no show this again] [Cancel] [Ok]" (3) "gpk-update-icon Security updates available The following important updates are available for your computer: libwebkit-1.0-2-dbg - Web content engine library for Gtk+ - Debugging symbols libcupsimage2 - Common UNIX Printing System(tm) - Raster image library ..." What is the best response to all of this? I went through something similar in an attempted network upgrade from 8.04 to 10.04 and had to reload the unbootable machine fresh from distribution media (all data was lost). I'd like to avoid that here. I have not yet responded to the dialogs, and want to make sure the system is still bootable and not lose my data this time.

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• Windows 8 x64 with VMWare Workstation or inside ESXi

  - by Dommer

  I need to run several virtual machines on a core i7-920 box with 12GB or RAM and a 256GB SSD to host the VMs. It also has a Highpoint RocketRaid 2720SGL RAID controller with a 12TB RAID 5 array. I want one of my VMs to run Windows 8 x64, to have access to the RAID array as a native disk (not as networked drives and it needs to run at full speed) and to be able to send files quickly across the network. Initially I thought I'd try to do this using ESXi 5, but I have been unable to find any working RAID drivers for the RR2720SGL and it is not on the HCL for ESXi 5. In light of this, I have installed Windows 8 x64 on the hardware and am thinking of installing VMWare Workstation and running my VMs inside there. I guess my questions are these: How does VMWare Workstation 9 perform compared to ESXi 5? In the real world I mean? Presumably installing Win 8 as the host OS will give me way better performance for that Win 8 machine than Win 8 running under ESXi? I should stick with Windows 8 x64 as the host OS, right? If I install a domain controller VM inside my Win 8 box and join the Win 8 machine to that domain, am I insane (I would guess the Win 8 machine wouldn't see the domain controller until it finished starting everything up, but I don't think that matters)?! is it feasible to give metrics like this and if so, what is the likely value of x? 25%? 50%? 75%? Win 8 under ESXi runs x% as fast as Win 8 installed bare metal.

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• Virtualbox port forwarding with iptables

  - by jverdeyen

  I'm using a virtualmachine (virtualbox) as mailserver. The host is an Ubuntu 12.04 and the guest is an Ubuntu 10.04 system. At first I forwarded port 25 to 2550 on the host and added a port forward rule in VirtualBox from 2550 to 25 on the guest. This works for all ports needed for the mailserver. The guest has a host only connection and a NAT (with the port-forwarding). My mailserver was receiving and sending mail properly. But all connections are comming from the virtualbox internal ip, so every host connection is allowed, and that's not what I want. So.. I'm trying to skip the VirtualBox forwarding part and just forward port 25 to my host only ip of the guest system. I used these rules: iptables -F iptables -P INPUT ACCEPT iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT iptables -t nat -P PREROUTING ACCEPT iptables -t nat -P POSTROUTING ACCEPT iptables -A INPUT --protocol tcp --dport 25 -j ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -s 192.168.99.0/24 -i vboxnet0 -j ACCEPT echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -p tcp -i eth0 -d xxx.host.ip.xxx --dport 25 -j DNAT --to 192.168.99.105:25 iptables -A FORWARD -s 192.168.99.0/24 -i vboxnet0 -p tcp --dport 25 -j ACCEPT iptables -t nat -A POSTROUTING -s 192.168.99.0 -o eth0 -j MASQUERADE iptables -L -n But after these changes I still can't connect with a simple telnet. (Which was possible with my first solution). The guest machine doesn't have any firewall. I only have one network interface on the host (eth0) and a host interface (vboxnet0). Any suggestions? Or should I go back to my old solution (which I don't really like). Edit: bridge mode isn't an option, I have only on IP available for the moment. Thanks!

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• netkit: why cant my router 4 pc4 ping my router 1 pc1 - how can I solve this please?

  - by donok

  Below I have four routers connected but my pc1 on r1 cannot ping my pc4 on r4 and also my pc2 on r2 cant ping my pc4 on r4 and vice versa. Below is a network diagram: and the configurations are below that, could anyone help me please on making them accessible? ![connecting 4 routers][1] I cant post my diagram on serverfault(less than 10 rep) so I did on stackoverflow and asked the same question. pc1: ifconfig eth0 195.11.14.5 netmask 255.255.255.0 broadcast 195.11.14.255 up route add default gw 195.11.14.1 dev eth0 pc2.start: ifconfig eth0 200.1.1.7 netmask 255.255.255.0 broadcast 200.1.1.255 up route add default gw 200.1.1.1 dev eth0 pc3: ifconfig eth0 195.20.14.9 netmask 255.255.255.0 broadcast 195.20.1.255 up route add default gw 195.20.14.1 dev eth0 pc4: ifconfig eth0 200.2.1.11 netmask 255.255.255.0 broadcast 200.2.1.255 up route add default gw 200.2.1.1 dev eth0 r1: ifconfig eth0 195.11.14.1 netmask 255.255.255.0 broadcast 195.11.14.255 up ifconfig eth1 100.0.0.9 netmask 255.255.255.252 broadcast 100.0.0.11 up route add -net 200.1.1.0 netmask 255.255.255.0 gw 100.0.0.10 dev eth1 route add default gw 100.0.0.10 lab.conf: if you need more on that Ill post it up but I think most of the info is there. Any help would be greatly appreciated especially trying to make a connection between pc4 and pc1, even if you think it does not make sense please explain why. Thank you.

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