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  • Capturing wireless traffic (using Wireshark).

    - by Daisetsu
    When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to support packet capture and go into premiscous mode, but I don't see any other system traffic. What is wrong?

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  • VMWare ESXi virtual machine can contact the gateway but not the DNS server

    - by Nathan Palmer
    I am having a bit of a strange issue. I have a VMWare ESXi server with two virtual machines running on it. They are running just fine and can communicate on the network without a problem. I am now trying to add a third. I am installing Ubuntu 8.04 Server. I assign it a static IP address and it's a fresh installation. Once installed I can ping the gateway but I cannot ping the DNS server. It's on the same network with the other two VMs which are communicating just fine. I have tried to reinstall the operating system but it still fails to connect. Here is /etc/network/interfaces auto eth0 iface eth0 inet static address 192.168.1.23 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 gateway 192.168.1.1 dns-nameservers 208.67.222.222 #opendns dns-search mydomain.com Here is route Destination | Gateway | Genmask | Flags | Metric | Ref | Use | Iface localnet | * | 255.255.255.0 | U | 0 | 0 | 0 | eth0 default | 192.168.1.1 | 0.0.0.0 | UG | 100 | 0 | 0 | eth0 Since I'm running this behind a FortiGate this is what the sniff command gives me when I try to ping 208.67.222.222 arp who-has 192.168.1.1 tell 192.168.1.23 arp reply 192.168.1.1 is-at MAC 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request As you can see it looks like I never get a response. One interesting thing I notice is the arp reply's MAC doesn't look right. I have cleared the FortiGate's ARP cache though and checked the entry and it seems correct. The MAC it lists is the one for the router. However if I ping from a different virtual machine that is also Ubuntu 8.04 with a nearly identical configuration I get this. 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply So, what could I be missing? Thanks.

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  • Issues connection to Ubuntu via PuTTy

    - by user1787262
    I'm not sure this is the appropriate stack exchange site to post this question on. If not, please flag this for migration. I am trying to use PuTTy ssh into my ubuntu machine which is wirelessly connected to the same network. I originally ran ifconfig to get my ubuntu machines private network IP address. I then verified that ssh was running, I even ssh'd into my school network and then into the ubuntu machine itself. No problems yet. On my windows 8 machine I ran ipconfig to get my private network IPv4 address. I then pinged my ubunty machines IP and 100% of packets were received. I figured, "OK we are ready to use PuTTy to connect to my Ubuntu Machine". Keep in mind this was my first time using PuTTy. I tried entering the IP of my ubuntu machine in the PuTTy Config GUI but I got a connection timeout. At this moment I don't really know what's going on, SSH is running on port 22 of my Ubuntu machine and I can ping the machine why is it not connecting? (I tried [username]@ip too). So I went on my Ubuntu machine and ran nmap -sP 192.168.0.1/24 and found that my windows machines IP did not show up, the host is down. I'm at a lost in something I am not very familiar with. Would anyone be able to help me or direct me to some resources that would trouble shoot my problem? Thank you EDIT (ADDITION): tyler@tyler-Aspire-5250:~$ nmap -v 192.168.0.123 Starting Nmap 6.40 ( http://nmap.org ) at 2014-06-06 01:56 MDT Initiating Ping Scan at 01:56 Scanning 192.168.0.123 [2 ports] Completed Ping Scan at 01:56, 3.00s elapsed (1 total hosts) Nmap scan report for 192.168.0.123 [host down] Read data files from: /usr/bin/../share/nmap Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn Nmap done: 1 IP address (0 hosts up) scanned in 3.14 seconds tyler@tyler-Aspire-5250:~$ nmap -Pn 192.168.0.123 Starting Nmap 6.40 ( http://nmap.org ) at 2014-06-06 01:56 MDT Nmap scan report for 192.168.0.123 Host is up (0.022s latency). Not shown: 998 filtered ports PORT STATE SERVICE 2869/tcp open icslap 5357/tcp open wsdapi Nmap done: 1 IP address (1 host up) scanned in 72.51 seconds

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  • MS Access split database queries

    - by Lance Roberts
    When the frontend of a MS Access db queries a MS Access backend on another machine over the network, does it pull in the whole table/database/file, or does it have some way of extracting just what it needs from the backend, thereby lessening network load.

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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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  • automating remote software installation

    - by akshay
    I have a network consisting of n pcs(windows/linux).Now i want to automate installation on n pcs in netowrk.For example with one click of gtalk should get installed on n pc in network.Are there any softwares(paid/open src) that can be used to do this?One such software is IBM TPM but its dam expensive and complicated i guess.Are such software popular, cam asking this since i am planning to develop such software which is low priced.

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  • Mounting a Nested SSH Location

    - by Brandon Pelfrey
    I have a server that is only SSH-accessible to machines within a network and my only access to that network from the outside world is a single publicly-SSH-accessible node. Is there some way that I can mount the nested machine from the outside? Me - Public SSH-accessible Node - Internal SSH-accessible Machine Thanks!

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  • FreeBSD 8.0 - Macbook: Trying to Connect to Wireless

    - by Koroviev
    What Happened A few days ago I installed FreeBSD 8from USB to my Macbook (Core Duo, 13"). The first thing I wanted to do was get my GUI back. I'm new to FreeBSD and it's my first time off of mac or windows, so I had some learning to do. I tried to a make clean install of xorg with ports but it returned many "No address record" errors. I realised I hadn't configured network settings and then the fun started. I ran ifconfig and it found 5 devices: msk0, ath0, fwe0, fwip0, lo0. * ath0 was identified as media: IEEE 802.11 Wireless Ethernet autoselect so it was clear which one I needed. From what I gathered, there are 3 files and two processes involved here: /boot/loader.conf /etc/wpa_supplicant.conf /etc/rc.conf /etc/rc.d/netif wpa_supplicant (which is a part of the former too) I'm certain it's a big simplification, so correct me if I'm wrong here. What I Tried I configured /boot/loader.conf with the few basic settings, and I'm most sure that this file is okay. The other 2 were more puzzling. I tried to make a network package in wpa_supplicant.conf. I found the ssid of the router, but the security wasn't so easy. The routers configuration on security is set to "Auto", with no explanation given. Other options are there, but Auto is selected. Another laptop uses WEP to connect (it's Vista, so I don't know how to get any more info than that), but I never configured it to do it. There's a string labled "wireless key" on the bottom of the router which I entered to set it up a new machine on the network (Windows and Macs, so it was simplified). I never had to choose a security type and only learned about them by installing FreeBSD. So perhaps WEP is what "Auto" means, but I can't find any other evidence. wpa_supplicant.conf seemed to never be correctly configured. I always got errors related to it and WPA_supplicant doesn't work. It gave me "Can't disable/enable WPA in the driver" errors and more once when I enabled -d -d. This was when I was trying some suspect configurations in rc.conf though. Usually it does nothing except hijack the shell and print "CTRL-SCAN-EVENT-RESULT" every 10 seconds. I learned how to clone the ath0 device to a wlandev interface (wlan0). ath0 is associated to it and their connection seems to go smoothly. But the wlan0's connection to the network is the problem. I couldn't create this with rc.conf, I do something wrong and get ifconfig: create: bad value errors whenever it's parsed. I did it via the shell instead. What Now? I scanned with wlan0 today: ifconfig wlan0 list scan It shows my router, even my neighbour's router. It was a relief to finally get some feedback. So wlan0 is UP and detects the router, but it is always status: no carrier. It can't associate with it and I can't figure out why. Running /etc/rc.d/netif start returns almost the same result as ifconfig would. It shows lo0 and wlan0, and sometimes ath0. I still not sure what lo0 is doing. So; how do I associate with it? We can assume it's WEP security based on how the other laptop is setup. I'll give every relevant output here. After boot, with a blank rc.conf this is what ifconfig returns: msk0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=11a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4> ether 00:17:f2:29:89:3b media: Ethernet autoselect ath0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290 ether 00:16:cb:bb:fe:65 media: IEEE 802.11 Wireless Ethernet autoselect (autoselect) status: no carrier fwe0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=8<VLAN_MTU> ether 02:17:f2:60:ad:7e ch 1 dma -1 fwip0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 lladdr 0.17.f2.ff.fe.60.ad.7e.a.2.ff.fe.0.0.0.0 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 options=3<RXCSUM,TXCSUM> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5 inet6 ::1 prefixlen 128 inet 127.0.0.1 netmask 0xff000000 I run: ifconfig wlan0 create wlandev ath0 It returns: wlan0: bpf attached wlan0: bpf attached wlan0: Ethernet address: xx:xx:xx:xx:xx:xx Ifconfig now returns: msk0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=11a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4> ether 00:17:f2:29:89:3b media: Ethernet autoselect ath0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290 ether 00:16:cb:bb:fe:65 media: IEEE 802.11 Wireless Ethernet autoselect (autoselect) status: no carrier fwe0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=8<VLAN_MTU> ether 02:17:f2:60:ad:7e ch 1 dma -1 fwip0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 lladdr 0.17.f2.ff.fe.60.ad.7e.a.2.ff.fe.0.0.0.0 lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 options=3<RXCSUM,TXCSUM> inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5 inet6 ::1 prefixlen 128 inet 127.0.0.1 netmask 0xff000000 wlan0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether 00:16:cb:bb:fe:65 media: IEEE 802.11 Wireless Ethernet autoselect (autoselect) status: no carrier ssid "" channel 1 (2412 Mhz 11b) regdomain 106 indoor ecm authmode OPEN privacy OFF txpower 20 bmiss 7 scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 1 wme burst bintval 0 I run: ifconfig wlan0 up ifconfig wlan0 scan It finds my router and displays its details. I can feed it my routers details now, using: ifconfig wlan0 key value key value ... They show up in wlan0 when I run ifconfig, but it still doesn't associate. What details should I feed it, what exactly is needed? What, if anything, should I have in /etc/wpa_supplicant.conf (and if that psk is needed, is it most likely the string I mentioned above)? If I define the ssid in wpa_supplicant.conf, should I still feed it to wlan0? What process should I then use to associate it? 5 .How should I add these things to rc.conf so it will automatically do this at boot? A huge thank you in advance for any help you can give, I've spent hours crawling about the shell and I've learned quite a bit from it (I finally got the hang of vi too, from all that editing). But the sooner this is fixed, the better. *P.S. I was, and still am, wondering where the extra three devices come from (the wireless and wired were all I expected to find). lo0 is up at each boot and /etc/rc.d/netif, I have no idea what it is and can't find it in dmesg. Resources: /etc/loader.conf: Code: if_ath_load="YES" wlan_wep_load="YES" wlan_ccmp_load="YES" wlan_tkip_load="YES" /etc/wpa_supplicant.conf (I emptied it of everything unnecessary, because I was just causing errors) network={ ssid="BTVOYAGER2110-1C" } /etc/rc.conf has no network settings, I commented them out because of errors. There was my attempt to clone ath0 and feed it info, but I did if via the shell instead. I've included the output of dmesg as an attachment, in case it's useful. I'd include the boot text (which appears before login) but I don't know how to catch it into a text file. If it's needed and somebody tells me how, I will (actually, even if it's not needed, how can I view it to read?).

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  • internet connection occasionally stops, but can still ping .com sites

    - by rj
    hi, every half hour or so, for 1-2 minutes my browser will stop navigating to sites, "waiting for ... to respond.." within 2 minutes i will be able to connect to sites and browse like normal again. weird thing is, while i cannot connect to sites, i get ping replies from any .com i type in. this happens on my home wireless network, using FF and IE on a win7 desktop AND FF on an ubuntu laptop the network is wpa2 secured, these are the only connections.

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  • What good Sysadmin podcasts are out there?

    - by Zoredache
    The similar question on SO #1644 has lots of answers focused on software development. What do podcasts do you listen to for learning about Information technology trends Network Administration techniques Security Issues and threats Other system/network administration issues.

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  • Using Windows XP Mode Virtual Machine on a Domain

    - by DavidStein
    I've followed the instructions and installed and configured the Windows Virtual PC XP Mode. I've added it as a machine on the network and can log into it and use network resources. In the process I removed the saved credentials, which are just a default local login to the VM. I need to know how to set this so that the VM auto logs in with the domain account credentials used to log into the physical computer. Google hasn't helped me find the answer.

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  • How to increase performance of Remote Desktop

    - by H B K
    How can I increase performance of Remote Desktop on windows XP sp3? A better network connection is not an option, this is for at work. I have suggested a network upgrade to my boss and it is not in the budget right now, but I need to access my home computer and right now it is somewhat unusable.

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  • Controling virtualbox internet access?

    - by HandyGandy
    Host: Linux/Debian/Ubuntu/Mint ( Helena/karmic koala ) Guest: XP SP2 and SP3 Problem: Relatively new copy of XP migrated to vbox-virus free. To detect biral infection it is desired that internet access is limited. Network access to the host is desired, but access to the internet should be limited to a select few sites. The added overhead of network access should be small when the guest vbox is running, 0 when it is not.

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  • Set proxy authentication information in Fiddler

    - by Kangkan
    I wish to use Fiddler to debug the submitted request/responses from my SOAP client. I am inside a network that needs proxy authentication to talk to the server outside the network. Fiddler2 provides option to set the upstream proxy, but without the authentication information. How can I set it?

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  • VirtualBox 4.1.12 Ubuntu Host Bridged Networking

    - by hidden_premise
    Setup Ubuntu Server 11.10 x64 VirtualBox 4.1.12 One network adapter eth0 with a static IP address My /etc/network/interfaces looks like #Local loopback auto lo iface lo inet loopback #Primary Interface auto eth0 iface eth0 inet static address 10.0.0.6 netmask 255.255.255.0 gateway 10.0.0.1 Need Static IP for Ubuntu Host Static IP for multiple Ubuntu guests My attempt Downloaded the .deb for 64bit virtual box dpkg -i virtualbox.deb Create a VM and install ubuntu server 11.10 x64 from ISO Set the networking mode to bridged and choose 'eth0' as the interface Fail. None of the guides I can find for bridged networking work because everything changed since vbox 2

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  • Using Windows XP Mode Virtual Machine on a Domain

    - by DavidStein
    I've followed the instructions and installed and configured the Windows Virtual PC XP Mode. I've added it as a machine on the network and can log into it and use network resources. In the process I removed the saved credentials, which are just a default local login to the VM. I need to know how to set this so that the VM auto logs in with the domain account credentials used to log into the physical computer. Google hasn't helped me find the answer.

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  • What decent small-office level routers are there

    - by Glenn Slaven
    So let's say I have a network of less than 20 computers including a server that needs to be accessed externally. What router/firewall solutions would you recommend? It can be either hardware or software and would need to be able to do NAT Firewall DMZ Native VPN if possible Some form of network bandwidth monitoring Update: I've accepted the answer I liked but this question probably doesn't have a definitive answer, it would depend on your requirements. Please leave more suggestions with an explanation as to why it works well in your situation.

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  • Is PLC speed affected by mixing different devices?

    - by CFP
    Hello everyone! At home, I have 4 PLC devices for my home network. Two of them are 85Mb/s powerlan PLC adapters, while the others are 10Mbps powerlan PLC adapters. I have not been able to determine reliably whether the presence of the 10Mb/s ones impact on the speed of the 85Mb/s ones. Is it possible that the bitrate is limited by the slowest devices on the network? Thanks!

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  • Capturing wirelss traffic (using Wireshark).

    - by Daisetsu
    When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to support packet capture and go into premiscous mode, but I don't see any other system traffic. What is wrong?

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  • Debugging Windows 2008 (Roaming Profile) user logon

    - by Jeroen Wilke
    I would appreciate some help debugging my windows 2008 profile service. Any domain account that logs on to my 2008 machine gets a +- 20 second waiting time on "user profile service" I am using roaming profiles, they are around 8mb in size, and most folders are already redirected to a network share. event log registers no errors, there is more than 1 network card installed, but I have the correct card listed as "primary" Is there any way to increase verbosity of logging on specifically the "user profile service" ? Regards Jeroen

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  • Which program do you recommend for monitoring the list of installed programs in Windows?

    - by Nickolai Leschov
    I am in charge of a computer network in a small company (20..30 computers). Recently the need arose to control what kinds of programs our company is using i.e. to collect information that is available when one opens "Add or Remove Programs" in Windows. I would like to have a program that will collect this kind of information over the network of Windows machines. What is your recommendation?

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  • How can I scan from Canon PIXMA MX700 without disabling OS X firewall?

    - by Justin Love
    I have a Canon PIXMA MX700 connected by ethernet. When I first bought it I was using OS X 10.4, and scanner-initiated scanning worked fine. After upgrading to 10.6, neither scanner-initiated or scanning from MP Navigator EX works with the firewall enabled. The firewall lists exceptions for three applications: Canon IJ Network Scan Utility.app Canon IJ Network Scanner Selector.app MP Navigator EX 1.0.app I get no further blocked warnings, and /var/log/appfirewall.log lists nothing for today (my latest attempt to use it).

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  • decommissioning WINS

    - by longneck
    My network has all 2008R2 domain controllers, but we are running Active Directory in Windows 2003 mode. Two of our domain controllers are configured as WINS servers. I have discovered that our copiers and fax machines are currently configured to use WINS to find their servers, so I'm in the process of configuring them to use DNS instead. How can I find out what else is actively using WINS? What procedure should I follow to decommission WINS from my network?

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