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  • Internet not working on a VirtualBox Linux machine

    - by mtahmed
    I installed VirtualBox on a Windows 7 PC and installed Xubuntu (Ubuntu with XFCE) on it. Now on the Windows, I am connected to the internet through a LAN which automatically authenticates to connect to the network(because its my work computer). I have also installed the guest additions on this virtual machine (Xubuntu). I tried both NAT and bridging to set up internet connection but I still cannot connect to the internet. For NAT: The browser doesn't say website not found but it keeps trying to load it forever and the network status monitor (the one provided by VirtualBox) doesn't show any green light (no incoming packets). For Bridging: Same as for NAT but the network status monitor shows incoming packets and outgoing packets. But internet still doesn't work. I tried a lot of different things but none worked.

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  • How to connect a VM running on an ESXi host to that host via a VMKernel NIC?

    - by Zac B
    Say I have an ESXi (5.0) host that runs a Linux distribution which hosts iSCSI targets, which contain the images for other VMs which the host will run. When it's used, I'll start the host first, then the iSCSI server, and then refresh all storage targets/HBAs in order to see the provided shares as online. I know it's a strange puzzle-box solution, but I was told to implement it. The ESXi host itself has a gigabit NIC which connects to the outside world. The guest OS (CentOS) supports VMXNet3, however, and if I can, I'd like to use its VMXNET3 NIC to host iSCSI for the ESXi host. How should I go about doing this? I went to create a new virtual network, and selected "VKernel", as it suggested that I use that type of network for SAN traffic, but it is apparently not set up for "self-hosted" SAN hosts, as the new network did not appear as an option to attach the CentOS box's VMXNET3 NIC to. How should I best connect an iSCSI host out to its "parent" ESXi host, if I need a) a 10gb connection, and (optionally) b) a VMKernel network for it?

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  • Problem with network policy rule in Network Policy Server

    - by Robert Moir
    Trying to configure RADIUS for a college network, and have run into the following frustration: I can't set an "AND" condition for group membership of authenticated objects in the network policy rules, e.g. I'm trying to create a NPS rule that says, essentially "IF user is a member of [list of user groups] And is authenticating from a computer in [wireless computer group] then allow access. The screenshot above is the rule I am having trouble with. It does not work as written. The rule underneath it, which is identical in every aspect except the conditions rule, does work. I've tried changing the non-working rule to define each set of groups as "Windows group" rather than specifically as machine and user groups, with no change. With the "faulty" rule enabled and the working one disabled, any attempt to login with a valid account from a machine that is in the wireless computers group gives a 6273 audit event in the windows event log: Reason code 66 - "the user attempted to use an authentication method that is not enabled on the matching network policy". Disabling the "faulty" rule, enabling the other rule and logging in with the same account and computer works just fine.

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  • Configure VPN to access remote LAN network on Windows7

    - by PiotrK
    Situation: I have two Windows7 machines (PC and laptop). I've set PC as VPN server and laptop as VPN client using default built-in W7 network tools. I've disabled use default gateway in remote network on client machine, so client don't try to route all communication through VPN. I've routed port 1723 (TCP/UDP) on NAT to my server and enabled IPSec/PPTP/L2TP passthrough I've put my laptop in indepedent network (basically I've connected it via 3G network), connected to VPN server and checked ipconfig /all I've get: IP Address: 192.168.1.101 Mask: 255.255.255.255 Gateway: (none) LAN mask in server LAN network is 255.255.255.0 - I am surely missing something obvious, but Google doesn't give me any good advices; How can I access local LAN network from remote VPN client? How can I access local shared documents?

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  • Cannot browse network shares in Windows Explorer, but paths are still accessible

    - by Jeff Lockhart
    Windows Explorer has somehow corrupted itself and I'm not sure how to fix this problem. My Windows installation has been in use for a few years with network shares setup and working. Recently, I noticed that a program that I use to save network share paths to a database was no longer opening the explorer window to browse the path. It usually opens to the last path saved, but now it was just not opening at all. When I go to Windows Explorer to browse the network share directly, I get the error \\SERVER is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The specified network provider name is invalid. The network shares are just shares on the server itself (once saved to the database, they're used on the server as well as clients to reach files). The strange thing is, the files are still accessible from the program that uses them if I type the network share path in manually. So it is only a problem with Windows Explorer browsing the path. The reason I think there is some sort of configuration or setting, possibly in the registry, corrupted is that when the problem first manifest itself, I was somehow able to open an explorer window to a network share path, but the breadcrumb in the address bar did not function properly. It duplicated the share name folder at the top of the breadcrumb stack and when I clicked the second of the duplicated share folder, it crashed explorer.exe. I haven't been able to browse any network share path since this happened. I have tried using the IP address directly \\192.168.1.# as well as \\localhost and neither of those work either. I have tried running sfc /scannow and it did not find any errors. I tried ipconfig /flushdns and this made no difference. Attempting to map the network share to a drive fails using either the explorer GUI or net use command. Is there some way to reset Windows Explorer somehow to resolve this? I'd really like to avoid reinstalling Windows entirely if I can.

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  • Looking for a fiber optic "switch" or "router" for home use

    - by Shrout1
    The gist of my question: What is a "fiber optic" switch called? I.E. a layer 2 ethernet switch that uses fiber TX and RX connections and sends layer 2 network traffic between the fiber strands that are connected. Can someone purchase a dedicated fiber switch that does not have copper ethernet ports? What is the current average price of a device like this? Not necessarily looking for product endorsements, just information Might not make sense to go this route if it is too cost prohibitive What type of fiber connector is used for terminating a fiber strand into a jack on the wall? Can fiber be "patched" using two jacks and a "patch" cable? Is signal loss a concern with the longest runs at 100-200ft, a patch cable and media converters? The full story: My parents had unterminated fiber optic cable and terminated Cat5e run throughout their home when it was built in 2004. 10 years later the Cat5e isn't providing the throughput that my father needs to accomplish multiple streams of HD and fast system backups throughout the house. He can't reach gigabit speeds across the distance of the Cat5e runs. We are both interested in terminating the fiber connections and using them as high speed "backbones" to copper switches in each room of the house. It would be easy to attain gigabit speeds (or better, eventually) using the fiber. I have searched and searched for a "fiber optic switch" or "fiber optic router" and cannot find the correct term to describe this piece of hardware. We can use fiber media converters at the end points of each connection, however it would be nice to have a "patch panel" set up in the network closet in the basement that has fiber connections on it and switches the ethernet streams between the connections/systems in the house. Each fiber media converter costs between $50-$100 a piece... After 10 or so terminated connections it might make sense to find a piece of hardware that does not require media converters. That would depend upon the cost of this hardware Somewhat unrelated, if we are able to route between these fiber strands successfully, what is the physical connector type used in a jack on the wall? Just like RJ45 has a wall outlet (depicted below): What is the fiber optic equivalent of this? In the interim could we "patch" a couple fiber strands together in the network closet? Would signal loss be of concern with a run length of 100-200 feet, a patch cable and two media converters? If that would work then it could be used until the funds are available for more.

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  • Setup for a live (low-latency) audio video broadcast over Wi-Fi?

    - by Majal Mirasol
    The Upgrade We are capturing audio (from mixer) and video (from a camera) from a main auditorium and passing it to separate rooms within the building. We used to have done this via manual audio/video cables and wires. We wanted to "upgrade" the system and wirelessly broadcast the stream via Wi-Fi. The Problem In our current setup (Wirecast running on A10 on a Wireless-N network), we have the problem of delay. Our streams are delayed from a minute up to five minutes on the clients (laptop/iPad/Android). This had not been a problem from the previous wired connections. Since the wireless network is local, we thought that a delay of less than a second should be achievable. Our Question And so it goes. Anybody there who has any experience for a setup that has both low latency and at the same time user-friendly to clients streaming in the program? Any recommendations would be highly appreciated. (Our current setup in on Windows 7, but setup on a dedicated Linux box is preferred, if achievable.)

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  • Finding cause of TCP retransmission within a LAN

    - by Surreal
    Hello denizens of Server Fault I have an irritating problem with a LAN of about 100 computers, 2 Windows domain servers, and 12 VoIP phones. Since their installation around a year ago, every week or so, we notice a VoIP phone resetting itself - occasionally in the middle of a call. Simultaneously there are often signs of temporary loss of connection on computers: freezes in explorer while accessing network shares, errors in our administration software due to loss of connection to the database server. I have been doing some Wireshark monitoring on the connection between the VoIP PBX and the rest of the network. Wireshark picks up a clump of retransmitted TCP packets at the times when we record phone restarts. The Wireshark log shows about 2 clusters of retransmissions a day ranging from 5 packets to hundreds. Those in each cluster are mainly between the PBX and some set of the VoIP phones, but not always the same set. Often retransmissions at the same time are to phones connected to the same switch, but sometimes retransmissions occur together to phones at opposite ends of the network. There are usually some coincident retransmissions in passing TCP traffic, for example between client machines and the file servers. The spikes in retransmissions and phone resets do not correlate well with when the network is heavily loaded. They seem to occur slightly more during the day, but most in the evening, when traffic should be decreasing. They occur reasonably often late at night when most computers are turned off and traffic should be lowest. Do you have any ideas that might help diagnose the cause of problems like this? One thing I have not yet tried, but should have, is updating the firmware of all the switches.

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  • Can I set up OpenVPN on two or more machines so that they can each act as client and server?

    - by ianfuture
    The question summarises what I want to achieve. In more detail: I have a Windows XP Pro PC at a work location that I want to be able to access my home Windows XP Pro PC and other home computers from. But I also want to be able to connect to the work PC from home. I think the term generally used is a "mesh" network. Can I do this with OpenVPN ? If so how would I do it? What are the most important things to remember to do? EDIT: The work Windows XP Pro PC is largely managed by IT Dept, I do have local admin rights to install things. Some settings are disabled. My main concern was firewalls and port forwarding on the work PC. Any suggestions?

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  • Providing reverse records for records that map to ISP IP

    - by thejartender
    I have been instructed to use my ISP ip (as a temporary fix for mapping my name server and domain records as my router dishes out rfc 1918 adresses to devices in my network where I am running an Ubuntu server, my router and my development laptop andso I have fixed: $TTL 3H @ IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); thejarbar.org. IN A 10.0.0.42 @ IN NS ns.thejarbar.org. yuccalaptop IN A 10.0.0.19 ns IN A 10.0.0.42 gw IN A 10.0.0.138 www IN CNAME thejarbar.org. To a temporary version of: $TTL 3H @ IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); thejarbar.org. IN A 88.89.190.171 @ IN NS ns.thejarbar.org. yuccalaptop IN A 10.0.0.19 ns IN A 88.89.190.171 gw IN A 10.0.0.138 www IN CNAME thejarbar.org. I am using bind and when using named-checkzone on this file according to my zone configurations, this file has no errors. I then run dig thejarbar.org @88.89.190.171 and get an expected authorative reply. My issue is creating my reverse DNS SOA zone and I would gratly appreciate assistance and guidance. I am stuck on how to represent the reverse records correctly for the eddresses that map to my isp IP. I am trying: $TTL 3H 0.0.10.in-addr.arpa. IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); 171.190.89.88. IN PTR thejarbar.org. 171.190.89.88. IN NS ns.thejarbar.org. 19 IN PTR yuccalaptop.thejarbar.org. 138 IN PTR gw.thejarbar.org. www IN PTR www.thejarbar.org. But running named-checkzone on this file leaves an erroneous return that IN: has no NS records I would greatly appreciate assistance

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  • Millions of SYN_RECV connections, no DDoS

    - by ThomK
    We have such server structure: reverse proxy (nginx) - worker (uwsgi) - postgresql / memcached. All servers are in local network behind router, with NATed external ip:ports (http/s 80/443 to proxy, and ssh 22 to all servers). Problem is, that sometimes proxy server netstat reports MILLIONS of SYN_RECV connections. From same IP / same ports. Like that: nginx ~ # netstat -n | grep 83.238.153.195 tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV tcp 0 0 192.168.1.1:80 83.238.153.195:3107 SYN_RECV [...] And this is not DDoS, because all IPs affected belongs to our website users. On side note, users says that it's not affecting them. Website is online and working, but... that particular one (from example above) told me that website is down and Firefox can't connect. I've done tcpdump. 19:42:14.826011 IP 83.238.153.195.zephyr-srv > 192.168.1.1.http: Flags [S], seq 1845850583, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:14.826042 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:17.887331 IP 83.238.153.195.zephyr-srv > 192.168.1.1.http: Flags [S], seq 1845850583, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:17.887343 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:19.065497 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:23.918064 IP 83.238.153.195.zephyr-srv > 192.168.1.1.http: Flags [S], seq 1845850583, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:23.918076 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:25.265499 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:37.265501 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:37.758051 IP 83.238.153.195.2107 > 192.168.1.1.http: Flags [S], seq 564208067, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:37.758069 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:40.714360 IP 83.238.153.195.2107 > 192.168.1.1.http: Flags [S], seq 564208067, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:40.714374 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:41.665503 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:46.751073 IP 83.238.153.195.2107 > 192.168.1.1.http: Flags [S], seq 564208067, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:42:46.751087 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:47.665498 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:42:59.865499 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:01.265500 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:13.320382 IP 83.238.153.195.2114 > 192.168.1.1.http: Flags [S], seq 2136055006, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:13.320399 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:16.320556 IP 83.238.153.195.2114 > 192.168.1.1.http: Flags [S], seq 2136055006, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:16.320569 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:17.665498 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:22.250069 IP 83.238.153.195.2114 > 192.168.1.1.http: Flags [S], seq 2136055006, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:22.250080 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:23.665500 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:23.865501 IP 192.168.1.1.http > 83.238.153.195.2107: Flags [S.], seq 3188568660, ack 564208068, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:35.665498 IP 192.168.1.1.http > 83.238.153.195.2114: Flags [S.], seq 3754336171, ack 2136055007, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:37.903038 IP 83.238.153.195.2213 > 192.168.1.1.http: Flags [S], seq 2918118729, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:37.903054 IP 192.168.1.1.http > 83.238.153.195.2213: Flags [S.], seq 4145523337, ack 2918118730, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:40.772899 IP 83.238.153.195.2213 > 192.168.1.1.http: Flags [S], seq 2918118729, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:40.772912 IP 192.168.1.1.http > 83.238.153.195.2213: Flags [S.], seq 4145523337, ack 2918118730, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:41.865500 IP 192.168.1.1.http > 83.238.153.195.2213: Flags [S.], seq 4145523337, ack 2918118730, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:46.793057 IP 83.238.153.195.2213 > 192.168.1.1.http: Flags [S], seq 2918118729, win 65535, options [mss 1412,nop,wscale 0,nop,nop,sackOK], length 0 19:43:46.793069 IP 192.168.1.1.http > 83.238.153.195.2213: Flags [S.], seq 4145523337, ack 2918118730, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:47.865500 IP 192.168.1.1.http > 83.238.153.195.2213: Flags [S.], seq 4145523337, ack 2918118730, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 19:43:49.465503 IP 192.168.1.1.http > 83.238.153.195.zephyr-srv: Flags [S.], seq 2835837547, ack 1845850584, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 7], length 0 Anyone have some thoughts on that?

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  • How can I selectively increase latency? E.g. throttle games

    - by Arcymag
    Basically, I want networked games to run poorly on a network, but I want everything else to run smoothly. I would also appreciate advice on blocking games in general. As far as I can tell, there's a few ways to completely prevent an internet game from running: Blocking entirely via DNS configuration (e.g. hosts file), or router DNS configuration Blocking entirely via a separate DNS server Blocking the application, by uninstalling or some kind of access control Blocking the application by automatically killing the process every once in a while Blocking the application by corrupting files periodically However, I would like a more subtle way to block a program. Something that either: Increases latency (would this be doable through some kind of QoS like what DD-WRT offers?) Increases latency by using a special routing configuration for specific target IPs Throttle other systems resources, such as memory, IO, or CPU Screw around with keyboard configurations when a game is launched I would like this to work on MacOSX and Windows, but Linux would be great too. FYI I don't have a kid, but I was brainstorming with some friends and parents.

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  • Windows 7 - Sharing a connection through WiFi?

    - by RadiantHex
    Hi folks, I have a PC with Win7 and an iPod touch. Win7 is connected to the internet through a 3G dongle, I have set up an Ad Hoc wifi network and ticked "Allow other network users to connect through this computer's Internet connection". I have connected to both networks, but I'm getting "No Internet access" as access type for the Ad Hoc connection. Any ideas?

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  • Windows 7 laptop constantly dropping internet connection

    - by Corbin Holbert
    I have scoured the web for an answer and failed to find one. I am using a Toshiba Satellite laptop running Windows 7 64-Bit. I have the computer connected via Wifi. Now, I am no beginner with the Internet, or anything related to computers, as I have grown up teaching everyone around me how to use computers, and went to college for IT. Everything on my network works flawlessly at all times, except for this evil laptop. The worst part is that I fixed this once before a few years back and recently had to replace the hard drive and re-install the OS, but cannot for the life of me remember what I did to make this problem go away. I am in my browser, connected to the Internet. I click a link. Suddenly no internet access. All I do is click down on the WiFi connection in the task bar, disconnect and reconnect immediately. Internet is back the moment I hit "connect." I have read many people had the same issues as I am having, but they all had triggers or other network issues. I have no trigger (this happens literally five to six times per minute no matter what I am doing) and I have no problems with my router, modem, or any other devices or computers on said network. As I am a web designer, and like to test my work live at every turn- this is going to result in this laptop being in pieces if I can't get it fixed soon. If more info is needed, let me know and I will provide. Thanks for any help offered! EDIT: Network Card: Realtek RTL8188CE Wireless LAN 802.11n PCI-E NIC Network state reads as "No Internet Access" when the problem first occurs, then magically I have Internet access for about ten seconds once I disconnect and reconnect. I have turned off IPV6, I have turned off power saving options for the network adapter, no viruses. Any new ideas? Also, I had to disconnect and reconnect four times just to get to this edit screen- and will likely have to do the same just to post it- it's that bad.

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  • outgoing DNS flood targeted to non-ISP hosts

    - by radudani
    Below is the specific traffic monitored at the network perimeter and originating from a user PC on Vista platform. My question is not about the effects of the flood, but about the nature of the source of it. Is this some known infection, or just an application went out of control? a standard NOD32 scan didn't find anything, as the user told me. Thank you for any hint. 14:40:10.115876 IP 192.168.7.42.4122 > 67.228.0.181.53: S 2742536765:2742536765(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.115943 IP 192.168.7.42.4124 > 67.228.181.207.53: S 3071079888:3071079888(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116015 IP 192.168.7.42.4126 > 67.228.0.181.53: S 3445199428:3445199428(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116086 IP 192.168.7.42.4128 > 67.228.181.207.53: S 2053198691:2053198691(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116154 IP 192.168.7.42.4130 > 67.228.0.181.53: S 2841660872:2841660872(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116222 IP 192.168.7.42.4132 > 67.228.181.207.53: S 3150822465:3150822465(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116290 IP 192.168.7.42.4134 > 67.228.0.181.53: S 1692515021:1692515021(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116358 IP 192.168.7.42.4136 > 67.228.181.207.53: S 3358275919:3358275919(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116430 IP 192.168.7.42.4138 > 67.228.0.181.53: S 930184999:930184999(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116498 IP 192.168.7.42.4140 > 67.228.181.207.53: S 1504984630:1504984630(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116566 IP 192.168.7.42.4142 > 67.228.0.181.53: S 546074424:546074424(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116634 IP 192.168.7.42.4144 > 67.228.181.207.53: S 4241828590:4241828590(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116702 IP 192.168.7.42.4146 > 67.228.0.181.53: S 668634627:668634627(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.116769 IP 192.168.7.42.4148 > 67.228.181.207.53: S 3768119461:3768119461(0) win 16384 <mss 1460,nop,nop,sackOK> 14:40:10.117360 IP 192.168.7.42.4111 > 67.228.0.181.53: 12676 op8 Resp12*- [2128q][|domain] 14:40:10.117932 IP 192.168.7.42.4112 > 67.228.181.207.53: 44190 op7 NotAuth*|$ [29103q],[|domain] 14:40:10.118726 IP 192.168.7.42.4113 > 67.228.0.181.53: 49196 inv_q [b2&3=0xeea] [64081q] [28317a] [43054n] [23433au] Type63482 (Class 5889)? M-_^OS>M-JM-m^_M-i.[|domain] 14:40:10.119934 IP 192.168.7.42.4114 > 67.228.181.207.53: 48131 updateMA Resp12$ [43850q],[|domain] 14:40:10.121164 IP 192.168.7.42.4115 > 67.228.0.181.53: 46330 updateM% [b2&3=0x665b] [23691a] [998q] [32406n] [11452au][|domain] 14:40:10.121866 IP 192.168.7.42.4116 > 67.228.181.207.53: 34425 op7 YXRRSet* [39927q][|domain] 14:40:10.123107 IP 192.168.7.42.4117 > 67.228.0.181.53: 56536 notify+ [b2&3=0x27e6] [59761a] [23005q] [33341n] [29705au][|domain] 14:40:10.123961 IP 192.168.7.42.4118 > 67.228.181.207.53: 19323 stat% [b2&3=0x14bb] [32491a] [41925q] [2038n] [5857au][|domain] 14:40:10.132499 IP 192.168.7.42.4119 > 67.228.0.181.53: 50432 updateMA+ [b2&3=0x6bc2] [10733a] [9775q] [46984n] [15261au][|domain] 14:40:10.133394 IP 192.168.7.42.4120 > 67.228.181.207.53: 2171 notify Refused$ [26027q][|domain] 14:40:10.134421 IP 192.168.7.42.4121 > 67.228.0.181.53: 25802 updateM NXDomain*-$ [28641q][|domain] 14:40:10.135392 IP 192.168.7.42.4122 > 67.228.181.207.53: 2073 updateMA+ [b2&3=0x6d0b] [43177a] [54332q] [17736n] [43636au][|domain] 14:40:10.136638 IP 192.168.7.42.4123 > 67.228.0.181.53: 15346 updateD+% [b2&3=0x577a] [61686a] [19106q] [15824n] [37833au] Type28590 (Class 64856)? [|domain] 14:40:10.137265 IP 192.168.7.42.4124 > 67.228.181.207.53: 60761 update+ [b2&3=0x2b66] [43293a] [53922q] [23115n] [11349au][|domain] 14:40:10.148122 IP 192.168.7.42.4125 > 67.228.0.181.53: 3418 op3% [b2&3=0x1a92] [51107a] [60368q] [47777n] [56081au][|domain]

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  • Accessing guests on virtual network when connected to host via PPTP

    - by Viktor Elofsson
    I'm setting up a development machine which runs Ubuntu 12.04 and KVM for virtualization. I have a guest running Ubuntu 12.04 which can be accessed from the host via its IP address which is assigned by libvirt. The guest can also access the internet, no problem there. However, now I want to setup PPTP so I can connect to the host (from my workstation running Windows 7) and directly access guests without relying on SSH port forwarding. I can connect from my W7-machine to the host (PPTP), but I cannot access any virtual machines (which are accessable from the host directly). Relevant configuration files cat /etc/network/interfaces auto lo iface lo inet loopback # device: eth0 auto eth0 iface eth0 inet static address x.x.x.x broadcast x.x.x.x netmask x.x.x.x gateway x.x.x.x # default route to access subnet up route add -net x.x.x.x netmask x.x.x.x gw x.x.x.x eth0 virsh net-edit default <network> <name>default</name> <uuid>xxxxxxxx-72ce-3c20-af0f-d3a010f1bef0</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <mac address='52:54:00:xx:xx:xx'/> <ip address='192.168.122.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.122.2' end='192.168.122.254' /> <host mac='52:54:00:yy:yy:yy' name='web1' ip='192.168.122.11' /> </dhcp> </ip> </network> cat /etc/pptpd.conf (commented lines removed) # TAG: option # Specifies the location of the PPP options file. # By default PPP looks in '/etc/ppp/options' # option /etc/ppp/pptpd-options # TAG: logwtmp # Use wtmp(5) to record client connections and disconnections. # logwtmp #(Recommended) localip 192.168.122.1 remoteip 192.168.122.234-238,192.168.122.245 cat /etc/ppp/chap-secrets* # Secrets for authentication using CHAP # client server secret IP addresses xxxxx * yyyyyyyyyy 192.168.122.100 I get the correct IP address when connecting my W7-machine, but when I try to ping the virtual machine at 192.168.122.11 I get Reply from 192.168.122.1: Destination port unreachable. It's probably something trivial I'm missing but I can't for the life of me figure out what it is. So I'm turning to you, serverfault.

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  • How to share a USB modem?

    - by allenskd
    Usually I wouldn't have this problem if it was a dsl modem or cable modem but it's really been difficult for me to share this little modem to other computers. Right now I have my laptop connected to a hub, both computers are in the same workgroup and I have "share this computer internet to other computers"... etc. Problem is, I don't know what is currently happening... I'm hoping someone would guide me, I have googled and some people have been successful at sharing the connection but it seems I'm missing something =/ Let me know if you need any details, thanks

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  • Access Router after logging into VPN

    - by Dan
    I access my linksys router through its webserver (192.168.1.1 into a web browser), but can no longer access it once I log into my work vpn. Is there a way I can still get at my router and change the settings? Or do I first have to disconnect from the VPN first? Thanks, Dan

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  • Windows Vista claims wireless key is the wrong length

    - by humble coffee
    A family member of mine is house sitting and has been given the details of their wifi. The access point is an Airport Express, it has WEP encryption (I think) and they've been given a passphrase to use. I know it's a passphrase and not the encrypted key as it's an English word. The passphrase is 10 characters long. The problem is that Vista complains that it's not a valid key as it must be a 5 or 13 character non-hex key or a 10 or 26 character hex key. (From what I've read this suggests the encryption is WEP?) I've found a couple of suggested solutions, but I'm not actually at the house at the moment so I wanted to make sure I have a good chance of getting it to work when I'm there but have no internets to ask. Solution 1: Vista needs to be told explicitly what kind of encryption and key is being used. Specify in the connection settings that you are using WEP and that it is a "shared key". Solution2: Try converting the passphrase to hexadecimal using an ASCII-hex converter and entering that.

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  • Monitoring Maximum Process Network Activity

    - by user125973
    We have a collocated server on which we run some OpenVZ hosts. Recently, we have had to pay a lot extra we keep exceeding our bandwidth quota. Our quota is 5 Mb/s but we have spike to almost 50. I looked at the graphs and there are some spikes happening at some intervals. I want to know which process is causing this so I need a tool that monitors the processes and gives me the one with the maximum instant traffic (It doesn't matter how much traffic we have as long as we don't exceed the 5Mb/s quota). Does anyone have a recommendation for this? My hosts are CentOS 5 with OpenVZ so I can see all the containter processes from the host, if that helps in any way.

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  • lxc bandwidth control using tc

    - by kumar
    I am trying to restrict bandwidth inside my containers. I have tried using the following commands , But I think it is not getting effective. cd /sys/fs/cgroup/net_cls/ echo 0x1001 > A/net_cls.classid # 10:1 echo 0x1002 > B/net_cls.classid # 10:2 tc qdisc add dev eth0 root \ handle 10: htb tc class add dev eth0 parent 10: \ classid 10:1 htb rate 40mbit tc class add dev eth0 parent 10: \ classid 10:2 htb rate 30mbit tc filter add dev eth0 parent 10: \ protocol ip prio 10 \ handle 1: cgroup Here A and B are containers created with this command. lxc-execute -n A -f configfile /bin/bash lxc-execute -n B -f configfile /bin/bash Whereas configfile contains only this entry: lxc.utsname = test_lxc AFter starting the container , I have started vsftpd inside container A and try to access the files using the ftp client from another machine. Then I killed vsftpd in container A and started vsftpd in container B and try to access the files using ftp client from another machine. I cannot observe any difference in performance, for that matter it is nowhere nearer to 40mbit/30mbit. Please correct me whether anything wrong here.

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  • Why does just splitting an Ethernet cable not work?

    - by Sin Jeong-hun
    I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why would splitting one Ethernet line from my home router into two and connecting two computers not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room, and I had put a computer in another room (also my room, though). Since a wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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