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• Printing to shared printers across VPN

  - by CYMR0

  I have a program that prints labels at five remote sites. Two sites, aren't working, but the rest are with an identical (as far as I can tell) setup. Using Wireshark, I have determined that the handshaking all goes well, but after the "Open Print File Response" the packet that is sent from the server, doesn't reach the client. But I'm a bit at a loss as to where I go from here. I know the port the packet was sent on (445) isn't being blocked, the RST packet gets sent on the same port and that gets there fine. It's also weird that the three out of five sites are working fine. This has been up and running for years without issue, all that we have changed is our connectivity (from DSL to bonded DSL). But this traffic is over a VPN - so it can't be the ISP interfering either can it? I'm totally stuck, and any help would be much appreciated. Thanks!

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• How to connect a Bluetooth network connection using the command line

  - by Ed Guiness

  I can enable a Local Area Network interface for my machine with the command netsh interface set interface "Local Area Connection" ENABLED Is there an equivalent command to connect a bluetooth network connection? I've tried netsh interface set interface "Bluetooth" ENABLED but it seems to have no effect, the connection remains disconnected. I also tried netsh interface set interface "Bluetooth" connect=CONNECTED but this returns One or more essential parameters not specified I know this Bluetooth connection is otherwise ok since I am able to connect using Control Panel Network Connections, right-clicking on Bluetooth Connect.

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• Most awesomely bad hack

  - by Zypher

  As I sit watching one of my latest dirty dirty hacks run, I started wondering what kind of dirty hacks you have created that are so bad they are awesome. We all have a few of them in our past - and they are probably still running in production somewhere, chugging along somehow still working. Which reminds me of the hack we had to put into place when we were moving data centers. Our IVRs had to keep running, as the data center we were moving from was the primary DC, and the new Primary wasn't quite ready to take traffic. So what do we do. Well we answer the calls in DC1, then ship the sip stream over the internet to DC2 1900 miles away ... that just felt oh so wrong. So the question is, what is one (or more) of your awesomely bad hacks?

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• I'm looking for a monitor tool to test Jitter, ICMP, Traceroute and other network issues

  - by Elad Dotan

  I'm looking for a monitor tool to test Jitter, ICMP, Traceroute and other network issues. it could be an application I run from my company Network in NY and London or a SAAS service that have a service that can do it for me. I have a problem in my Data Center that I would like to fix. it happens in different times of the day. I want to run the monitor for few days and save the results so we can analyze them. any idea? Thanks!! Elad.

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• Which subnet masks are valid for a subnetted Class B address?

  - by Daddy Warbox

  Yes, this is a school question, and yes I already know the correct possible answers (supposedly), so I'm not going to bother posting them. Instead, I just want to understand the meaning of this question. I know what class B addresses are, and what valid class B subnet addresses are. I guess one way to define my question is to ask why the answer "255.255.0.0" is wrong, necessarily? That seems to defy my understanding, or else some part of my brain is just not registering the question correctly. Thanks in advance.

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• "Request not supported" in IPCONFIG (WinXP SP3)

  - by pablog

  In a customer PC (Windows XP SP3), suddenly the network went down: the network adapter appears with an error mark. I replaced the network card, but the new one does the same thing. When I enter IPCONFIG, XP shows this error (in standard and safe mode): Internal error occurred Request not supported Unable to query host name If I start the system with a boot cd the PC runs fine, so the problem seems to be in the XP installation. I tried: uninstalling and reinstalling the network card in the Device Manager disabling and reenabling the card netsh int ip reset netsh winsock reset catalog and a couple of "reset" programs (WinsockxpFix.exe, etc) with no luck. Is there any way to fix it without reinstalling XP? TIA, Pablo

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• How to run a DHCP service on Windows 7 Home

  - by Joshua Lim

  I'm trying to setup a DHCP server on Windows 7 Home, tried using a couple of freeware which I found on the Internet but none seemed to work. What I did: On the Windows 7 machine which I install the DHCP Server with the range 192.168.1.12-192.168.1.256. I set the Gigabit Ethernet adapter to a static IP address of 192.168.1.11 and subnet mask of 255.255.255.0. When I did an IP config, it showed. Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet Physical Address. . . . . . . . . : 8C-73-6E-75-A7-56 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::196d:b6bb:8f93:2555%12(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.1.11(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1 fec0:0:0:ffff::2%1 fec0:0:0:ffff::3%1 NetBIOS over Tcpip. . . . . . . . : Enabled I connected another Window 7 machine to the "DHCP server" using a cross cable and set network adapter on that machine to automatically detect IP address. The client fails to acquire the correct IP address from the DHCP server and showed the autoconfigured IPv4 address instead. Here's the information returned by config /all on the client machine. Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Atheros AR8152/8158 PCI-E Fast Ethernet Controller (NDIS 6.20) Physical Address. . . . . . . . . : 54-04-A6-40-96-4B DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::4885:4082:5572:5a85%12(Preferred) Autoconfiguration IPv4 Address. . : 169.254.90.133(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : DHCPv6 IAID . . . . . . . . . . . : 341050534 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-54-78-12-00-08-CA-46-4C-5A DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1 fec0:0:0:ffff::2%1 fec0:0:0:ffff::3%1 NetBIOS over Tcpip. . . . . . . . : Enabled DHCP client are running on both machines. I've tried many times but failed. Googling also returned no useful information for my scenario. Have I missed out any step? Thanks.

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• Connect laptop to mobile wifi

  - by Arnab Sen Gupta

  I have a nokia N97. In my apartment there's a wifi network that we all use to connect to the internet. But for the past few days my laptop is not able to find the network..Initially I thought it was a problem of the network,but hen I found out that others were able to use it..My vista os laptop is able to detect other available networks but not the required one..Then i tried to connect my cell phone to the network and it did easily!! I tried restoring the network settings to default but it showed the network for just 2 mins and it ws back to square one.. I wanted to know can I connect my laptop to the cell using USB and browse internet through that?? I have done it when I used GPRS but am not sure if it cn be done in this situation when the cell is connected toa wifi network..plz help..

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• How to forward UDP and TCP traffic from one IP to another

  - by Rishabh Agnihotri

  Well i have a server with two LAN Card Installed.I have a server in U.S and one in India.I have created a GRE tunnel to route all traffic from U.S Server to my Indian Server.My Traffic has UDP,TCP,HTTP,etc Traffic.Now i have two LAN Card on my Indian Server.Well i have configured two IPs on the system for some of my needs on the system.One is a /30 and another is a /24.Well now i want the /30 IP to talk to my /24 IP.Lets take a e.g the IPs are 180.151.130.34 - /30 and 103.243.19.254 -/24 I want to forward all the TCP,UDP,HTTP,etc like traffic coming to 180.151.130.34 to 103.243.19.254.In the sense i want to make them talk to each other in a way if a TCP/UDP Packet comes to 180.151.130.34 it should be forwarded to 103.243.19.254 and then that packet is sent back by 103.243.19.254 to 180.151.130.34.I am not able to configure this part.Can anyone tell me step by step how to do so? Well i forgot to specify i am using Windows Server 2008. Any help would be greatly appreciated.Thanks in advance.

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• SSL FTP fails on Windows 7 but not Windows XP clients

  - by Andrew Neely

  We currently use a free SSL-FTP client called Move-It-Freely to transmit data from a custom data entry program at over forty facilities scattered around the state to our central server. Under XP, it works flawlessly. Some facilities have upgraded to Windows 7. On these machines, uploads (transfers to us) work, downloads (transfers from us to them) fail. Replacing the Windows 7 machine with an XP machine solves the problem. We have also verified that the network firewall settings have not changed. This problem persists even if Windows firewall is not running. We were able to remote into one of the Windows 7 machines to verify that the Windows firewall was indeed turned off. We cannot replicate the problem on our own Windows 7 machines, and are at a loss of how to fix this feature for our customers. The data contain health-related information, and needs to be encrypted (hence SSL-FTP.) Despite hours spent on Google, we cannot find a solution.

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• Windows host MIA on network

  - by andrewbadera

  I've had a machine effectively disappear off my home office network. 192.168.1.100 - Windows 7 laptop (on domain) - problem machine 192.168.1.42 - Windows 2008 server (domain controller) 192.168.1.101 - Windows 7 laptop (guest; not on domain) For some reason I am unable to ping, tracert or remote desktop to 192.168.1.100 from .42 or .101. I can remote between .42 and .101 no problem however. .100 cannot ping nor remote desktop to .42 or .101. Remote Desktop access is enabled on .100. I've opened the firewall rules. I've disabled the firewall domain profile. I've turned the firewall service off entirely. No matter what I do, the .100 host is unreachable by any other host on the network. I'm at my wit's end. Thanks in advance for any debug advice!

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• routing wiredness - traceroute 'vanishes' en route

  - by The Journeyman geek

  I'm attempting to set up one of my boxes as a server (again), but i'm having some odd connection issues- the box itself connects fine to the internet, but trying to connect to my external ip address seems to result in the trace getting 'lost' partway. http://pastebin.com/HCQAGbvn - this is a traceroute from another system that's connected to another ISP - starhub is my own one, while i have another system that i have access to on singtel. I'm wondering if my ISP is messing around with routing, or is something very odd going on. As you note, the traceroute dosen't reach me, but if it helps, i use a dd-wrt router.

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• How do I configure tinydns (with fefe's IPv6 patch) to listen on IPv6 address?

  - by Christian Hudon

  I'm setting up my network to support IPv6. I have static IPv6 addresses assigned to each interface of my router, and radvd advertising different prefixes on each interface. The next step would be to get my dnscache (from djbdns) working on IPv6. Said dnscache has fefe's IPv6 patch applied, so I assume it should work with IPv6. However, I can't find any documentation online on how to make the patched dnscache listen on IPv6. How do I configure tinydns and dnscache to listen on IPv6 too?

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• Block Skype on Cisco IOS

  - by ensnare

  I'm trying to block skype via policy routing but it's not working ... here's my configuration: class-map match-any block match protocol skype policy-map QoS-Priority-Input class block police 1000000 31250 31250 conform-action drop exceed-action drop violate-action drop policy-map QoS-Priority-Output class block police 1000000 31250 31250 conform-action drop exceed-action drop violate-action drop interface FastEthernet4 description WAN service-policy input QoS-Priority-Input service-policy output QoS-Priority-Output

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• How to tell Windows 7 to ignore a default gateway

  - by zildjohn01

  I currently have 2 network cards in my PC -- one connected to an internal network on a router with a disconnected WAN port (10.x.x.x), and one connected to the internet through a consumer router (192.168.0.x). Windows seems to recognize them correctly (my "Network and Sharing Center" lists them as "No Internet" and "Internet" respectively), however when I try browsing the internet it always tries the internal network's default gateway, rather than the one with internet access. Trying to ping a website results in "Reply from 10.0.0.1: Destination net unreachable.". A simple "route delete 0.0.0.0 mask 0.0.0.0 10.0.0.1" fixes the problems, but they return upon reboot, or upon renewing my IP. Is there any way to tell Windows to ignore one NIC's default gateway, or to at least give them priorities?

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• Static route works on one computer, not the other

  - by Dan

  I have been struggling with this for a couple days now, maybe I just need some people with a fresh perspective to figure out what the issue is. Basically I have a bunch of computers that are being routed through a specific gateway in order to access a web page that is hosted internally on a separate subnet. I set up static routes on all of the computers, and they all work... except one. Here's what a route print -4 looks like for a working computer (Windows 7): =========================================================================== Interface List 14...xx xx xx xx xx xx ......Broadcom 802.11n Network Adapter 11...xx xx xx xx xx xx ......Realtek PCIe GBE Family Controller 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter 13...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter 17...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.xxx.xxx.230 10.xxx.xxx.94 20 10.zzz.zzz.0 255.255.255.0 10.xxx.xxx.147 10.xxx.xxx.94 21 10.xxx.xxx.0 255.255.255.0 On-link 10.xxx.xxx.94 276 10.xxx.xxx.94 255.255.255.255 On-link 10.xxx.xxx.94 276 10.xxx.xxx.255 255.255.255.255 On-link 10.xxx.xxx.94 276 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 10.xxx.xxx.94 276 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 10.xxx.xxx.94 276 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 10.zzz.zzz.0 255.255.255.0 10.xxx.xxx.147 1 =========================================================================== And here's a route print -4 from the station that doesn't work (also Windows 7): =========================================================================== Interface List 10...xx xx xx xx xx xx ......Realtek PCIe GBE Family Controller 1...........................Software Loopback Interface 1 12...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 16...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.xxx.xxx.230 10.xxx.xxx.132 276 10.zzz.zzz.0 255.255.255.0 10.xxx.xxx.147 10.xxx.xxx.132 21 10.xxx.xxx.0 255.255.255.0 On-link 10.xxx.xxx.132 276 10.xxx.xxx.132 255.255.255.255 On-link 10.xxx.xxx.132 276 10.xxx.xxx.255 255.255.255.255 On-link 10.xxx.xxx.132 276 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 10.xxx.xxx.132 276 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 10.xxx.xxx.132 276 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 10.zzz.zzz.0 255.255.255.0 10.xxx.xxx.147 1 =========================================================================== Both of these stations are running Windows 7. So essentially what I am trying to do here is route all traffic to the 10.zzz.zzz.0 subnet through the 10.xxx.xxx.147 gateway. Everything else should go through the 10.xxx.xxx.230 gateway. This is the intended behavior, and again it is working everywhere but that one station. I noticed that the Active Route metric costs differ between the two stations, but I am new to the routing table and I am not sure how that is impacting the behavior. I hope I have been able to explain the situation clearly. Any help would be much appreciated. I can provide any additional information if needed!

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• How to bypass vpn talking to VMWare Guest?

  - by marc esher

  Greetings. Network/VPN n00b question here. I'm running VMWare Workstation with a Guest Windows 2003 Server. It has SQL Server 2000 installed. The sole purpose for this Guest is to house SQL Server... it needn't have internet access or access to any other resources on the network other than the host. When launch Check Point VPN software, the host routes through the company network before it connects to the guest ... i.e. it's no longer a direct connection. I assume this is just how things are supposed to work. However, what's happening is that the connection between my host and the SQL Server instance on the guest intermittently drops. It's not consistent, and some databases on the server will be responsive while others aren't. It appears that the databases with the most traffic on the guest (the ones I'm hitting with load tests) are the ones that become intermittently unresponsive. This problem only manifests when VPN is on; when it's off, I can pound away on this database with no troubles. Thanks for any advice!

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• Windows Hosted Network Redirect to IIS

  - by rulestein

  I would like to setup a Windows 7 machine as a wifi hotspot that always redirects to the IIS web hosting on the same machine. I have the hotspot piece working with the built in hosted network of Widnows 7. The webhosting was easy enough with IIS. Now, how do I connect the 2? The idea is to have a standalone device that users will be able to connect to the wifi and any webpage they go to will redirect to the internal webpage. I only expect 1 or 2 users at a time and there won't be any internet access involved.

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• What do you use to loadbalance IPv6 services?

  - by Michael Renner

  Hi, the current Linux software environment for IPv6 load balancing looks a bit grim. IPVS has rudimentary support for IPv6 but it's far from complete. NAT for IPv6 seems to be a no-go. Are there any other projects which aim for this goal? Does the IPv6 support in other OS look better? Are there any commercial products which have been successfully used in production environments with non-trivial load patterns? Or is it just that the time for IPv6 hasn't come... yet? ;) best regards, Michael

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• TCP Tweaking options and Results: Any suggestions?

  - by krishnakumar

  I first tried with the default windows XP TCP option(It doesn't have TCPWindowSize option and TCP1323 in its Registry setting). I dynamically set those options using TCP optimizer. Here I list out the result with and without TCP Tweaking option. I see no major improvements in TCP after increasing window size optimally too. What value should I set to increase the performance? Results: Without any window size and MTU setting from server to client (receiving) TCPWindowSize : MTU : TTL: Size:586 MB total duration : 03:47 With window size extension from server to client (receiving) Bandwidth :100 Mbps Latency: 100ms BDP :1250000 TCPWindowSize : 1250000 MTU :1500 TTL:128 Size:586MB total duration : 03:44 With window size extension from server to client (receiving) TCPWindowSize :64240 MTU :1500 TTL :112 Size: 586MB total duration : 03:49

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• Linksys WUSB11 v2.5 - anyway to make it work with WPA?

  - by Jack B Nimble

  Is there any way to get a Linksys WUSB11 v2.5 adapter to work on a WPA network? The only option in when trying to connect is WEP. I have the only driver available from the website, which is from 2002.

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• Connecting 2 different subnet masks

  - by Jonathan

  I'm no network genius, but I have managed to get most things running. I get confused about subnets and gateways though. We have an office server connected to around 20 PC's that all communicate fine. We have just gotten a cutting machine that won't connect to our network. The server has DHCP, but that fails on the cutting machine, so I've been trying to set the IP manually. Server details are as follows: IP: 10.1.1.12 SUBNET: 255.255.255.0 GATEWAY: 10.1.1.1 Internet connection is via the modem which is 10.1.1.1 An office PC is ussually set up through DHCP and has the following settings: IP: 10.1.1.36 SUBNET: 255.255.255.0 GATEWAY: 10.1.1.1 PRIMARY DNS: 10.1.1.12 Cutting Machine computer has 2 network ports. 1 is specifically for the communication between the PC and the cutting machine. It's details must be as follows: IP: 10.100.100.2 SUBNET: 255.255.255.252 GATEWAY: BLANK The other network port need to connect to the server. I was told that the IP and SUBNET need to be as follows: IP: 10.100.100.1 SUBNET: 255.255.255.252 GATEWAY: ?? How can I connect this port to the server and/or the internet. If anyone can offer assistance, it would really be appreaciated.

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• apache2 slow responding (debian)

  - by baloo

  I'm running an apache2 2.2.9 webserver with modpython and mpm_worker_module. The current config for the mpm is ServerLimit 32 StartServers 10 MaxClients 800 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 The server has 1G of ram and a 100Mbit connection. Checking netstat -na | grep ESTABLISHED | wc -l gives me a number between 50 - 60. The load is about 1.0 Every pageload is also cached by memcached. I can't see why the server is so slow in responding to new connections, sometimes droping them completely? Also tried disabling iptables to make sure it's not because of a full state table or something like that. The only thing in dmesg is a lot of spam about "TCP: Treason uncloaked!"

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• Make case-sensitive SMB share case-insensitive

  - by fungs

  I am running a legacy XP app that I would like to move on a network share. It is very simple and works in theory but the server providing the share is based on Linux (cannot configure) and the software does not work correctly because it is programmed case-insensitively, it seems. After some research, network shares behave like the filesystem they use underneath. This is normal. Unfortunately I cannot fix the software myself. Is there any way to turn the case-sensitivity into case-insensitivity for a Windows network drive on the client side? I fould two approaches: First, something like icasefile (http://wnd.katei.fi/icasefile/) that wraps around the program and intercepts the file I/O. This is for UNIX only. Secondly, a proxy virtual file system (e. g. something using Dokan). Unfortunately I couldn't find any suitable fs, the only possibility would be to put a case-insensitive filesystem on an image file and put this on the share using for example lmdisk (http://www.ltr-data.se/opencode.html/#ImDisk). Do you have any better ideas?

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• OpenSuSE 11 iscsi target: HFS+ partition not seen by clients

  - by radiopaque

  I have an openSuSE machine as a file server, which has an Areca 1880i inside. It contains several partitions. There is a dm-0 and a dm-1 partition, for example. The partitions are formatted as EFI system partitions, with HFS+ file systems. My opensuse could not read them but the iscsitarget exported them for my Macs. This worked for more than a year. For some reason now, after some network problems which were "solved", my dm-0 partition is not seen anymore! I suspect it is a problem on the iscsi target side, i.e. the OpenSuSE machine. Can anyone suggest what I should look into? Any logs, any settings on the linux machine? None of my macs can access the partition, and they use different client software!! Thanks!

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