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• Windows user cannot connect via application, but can via Remote Desktop

  - by C. Ross

  I have an application (ASG-Zena) giving an 1385 error (Logon failure: the user has not been granted the requested logon type at this computer) when trying to run a batch job. I have checked on "Access this computer from the network" includes Everyone and Administrators and many others. "Deny access to this computer from the network" make sure that Guest is not listed there. If you still have problems, then maybe make sure that nothing is listed there. Administrative tools...local security policy..security options "Network access sharing and security model for local accounts" there are 2 options either classic or 'guest only'. Mine is set to classic. (These diagnostics come from this post) The account in question is added to the Administrator group on this computer. I know the login is valid because I regularly login to the server via remote Desktop. What other settings should I check?

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• Not able to connect to internet in RHEL 5

  - by chankey007

  I just installed red hat enterprise 5 in my laptop and on desktop both. In desktop it is working fine but in laptop it is not showing the eth device. (I tried ifconfig only lo is there). I tried ifup eth0 still nothing happened. The network service in /etc/sysconfig/network-scripts/ifcfg-eth0 and in /etc/sysconfig/network are enable. I had ubuntu in my laptop before and I faced same problem with that too. Is there any problem with my laptop? I have my system on dual boot and in win7 networking is running fine. I am not able to connect to the internet only, other devices are working fine. System conf: Sony vaio E series. 3 GB RAM, intel core i3 2.13 GHZ.

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• What are the advantages of OSPF vs nexthop self with iBGP?

  - by Matt Hamilton

  Assuming I have a fairly small network internally, but I have 4 routers each connected out to a different network. The routers are all sat next to each other connected via a switch. Each router uses BGP to speak to the outside networks. There is an iBGP mesh for each router to exchange the routes internally it knows about from each external network. The usual setup is to use OSPF to distribute the connected routes, as the routes via iBGP will still have the next hop set to their original value. What is the advantage of using OSPF in this scenario versus simply using 'set nexthop self' on the routes?

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• Windows VPN not authenticating from ADSL to Wireless link

  - by deanvz

  I have a normal windows VPN on a computer connecting to a 196.201.x.x/24 IP. If this VPN tries to connect from any address in the 41.x.x.x range it cant get there. The server is a normal windows 2008 server, running exchange with a PPPoE IP natted to a public IP on the public gateway of the wireless network as the server is on site and its connectivity is derived from Mikrotik RB's. The computer on the 41 range can traceroute and ping the server, but the VPN does not authenticate. When on the network or any other, the VPN works fine. Is there something that could be configured on the VPN client? All firewall settings of a standard ADSL router have been checked and found to block only ICMP's. Is this a VPN configuration problem or a network issue?

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• Windows 7 PPTP VPN problem

  - by Marco Martins

  Hi, I'm currently using an win 7 as an network server at my home. I've created some shared folders wich can be accessed easily from any pc on my network (win and mac computers) recently I decided to turn on the win 7 pptp to access remotely to my server from anywhere. the problem is with that on, on my router my server ip change, acording to my ipconfig on the cmd my router gets the ip from a "PPP adapter RAS (dial in)". when that happens I cannot access to the shared files over the lan on my mac, but i can connect to the vpn but again can't access to my files. (i've tried connecting to the vpn from another network and it worked, even the file share) anyone can help me? thanks

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• recent unreliable wireless connection

  - by gabkdlly

  Recently, my internet connection over wireless ( via a Netgear KWGR614 router ) has become unreliable, on both a Dell laptop running Ubuntu 10.04 as well as my Desktop running Ubuntu 10.10 . The problem does not seem to occur on a laptop running Windows Vista, nor on a Desktop running Windows 7 ( this machine is connected with an ethernet cable ). The problem does not seem to occur on my Openmoko Freerunner ( running Android 1.5 ), though I hardly ever use this device to connect over WLAN, so the problem may have just slipped by. On my main Ubuntu Desktop, I have tried the following wireless devices: a Longshine PCI card ( an old device with an RTL8180L chip ) a D-Link DWL-510 PCI card ( this device threw warnings in dmesg ) a USB device from MSI ( US54EX ). Usually my wireless network shows up in the network manager with a normal signal strength, even when the connection speed is slow or the connection gets reset ( asking me to click connect to re-authenticate my wireless connection ). I have observed this problem with a Netgear KWGR614 Router ( with the manufacturers firmware ), as well as with a TP-LINK TL-WR741ND router running OpenWrt. Taking a look at my routers logs, I find many instances of the following line: Tuesday,04 Jan 2011 03:53:01 [TCP SYN Flood][Deny access policy matched, dropping packet] I know that the Netgear router is susceptible to denial of service attacks, as I have previously been able to disrupt its operation by putting an nmap scan into a while loop. I use WEP or WPA to encrypt the wireless network. Is it possible that someone is jamming my signal ?

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• How do I access an Ubuntu VirtualBox guest at a static IP from an OS X host?

  - by David Siegel

  How does one configure an Ubuntu guest to use a static IP that's visible to an OS X host, and ensure that the static IP is independent of the host's network configuration? I previously used bridged networking for my guest, but I'm constantly moving my host between networks so the guest IP is always different. First, I tried setting the guest network configuration to NAT and forwarding host port 1022 to guest port 22, so I could at least ssh to a fixed address (localhost:1022): $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/Protocol" "TCP" $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/GuestPort" 22 $ VBoxManage setextradata "Ubuntu Server" "VBoxInternal/Devices/e1000/0/LUN#0/Config/SSH/HostPort" 1022 Then, $ ssh localhost -p 1022 ssh: connect to host localhost port 1022: Connection refused But this didn't work (guest has no network access with NAT and OS X refused the connection, as you can see). I'd love a general solution that would let me communicate with my guest at a fixed IP.

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• What is a SIP 'Gateway' and how is different from a SIP Proxy/Registrar?

  - by Shrey

  Recently I started looking at SIP implementation for a future work. I was reading (Googling) about what SIP means and how to go about implementing a end-to-end SIP enabled VoIP network. What I did not get is what use does a SIP Gateway is for? How different is it with respect to SIP proxy servers or a SIP DNS/Locator like server? I understand probably QoS would be one primary factor - like dedicating a set bandwidth for SIP/VoIP specific I/O over a network. Anything else? Can anyone help me with any other hints/pointers? I fully understand that is quite a basic question - but I really couldn't find any text which could clear my doubt about what 'Gateway' would mean in SIP context and what differentiates it from other SIP based network components (like Softphones, Proxies etc). Thanks a lot.

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• Asus EEE PC 1005HA (XP Home) refuses to connect to Virgin Mobile MiFi

  - by Dennis Wurster

  My client has an Asus EEE PC model 1005HA, and we're attempting to connect it to the WiFi network created by a VirginMobile MiFi unit. They also have a MacBook Pro with Snow Leopard that has absolutely no issue connecting to the MiFi. The specific symptom is that the netbook fails to lease an IP address from the MiFi unit. I supply the 12-digit numerical password (WPA) to the netbook, it throws a 'waiting for network' dialog with an indeterminate progress indicator, and then times out. Update: We've determined that this behavior has stopped when the EEE PC and the MiFi unit were taken out of the client's home, and to a different home that didn't have an existing wifi network. Similarly, when taken to a third location that didn't have wifi, the EEE PC and MiFi got along swimmingly. My current theory is that the existing wifi networks and the wifi leg of the MiFi unit are on the same channel and competing with one another. Perhaps the MacBook Pro has the capability to overcome this interference, while the EEE PC doesn't.

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• setting up bridged adapter for VPN server

  - by B. VB.

  I have an Ubuntu linux Linode server that I am trying to install OpenVPN on. I'm following the tutorials (which, it turns out, are quite incomplete). auto br0 iface br0 inet static address 192.168.0.10 network 192.168.0.0 netmask 255.255.255.0 broadcast 192.168.0.255 gateway 192.168.0.1 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off When I add this chunk in my /etc/network/interfaces, and I restart networking, my eth0 interface does not have an IP and I cannot get on the network (I need to use a buggy, slow, and annoying AJAX term to do damage repair). Why does adding this screw everything up? Any tips on how to set up this bridged adapter?? Thanks in advance!

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• Tunneling over HTTP

  - by Morgan

  Hello, I have a network at work that is locked behind a firewall and Internet connection is available only by using a proxy server. At work, I can connect to databases that are distributed across the network. However, at home, I cannot connect to the proxy server or the databases. How can this be done? I can access my workstation via LogMeIn, so I can install anything on it. I thought of installing some kind of tunneling mechanism in my workstation. Then, at home, I could connect to this mechanism, which would in turn do the required connections. So essentially, what I'd like to do can be represented by the following diagram: Home = Workstation = Database. For example, whenever I connect to, say, 10.140.0.1:1234 at home, this would be redirected to 10.140.0.1:1234 of my Workstation, because 10.140.0.1:1234 is only available through the corporate network. NOTE: I'm using Windows XP.

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• Remote Control Home PC from Corporate Work PC

  - by muncherelli

  Here is my situation: I am currently on a Windows XP workstation at work. I have an android tablet that I use to splashtop into my home PC. I would like to be able to use my work keyboard and mouse to control my home PC while I am splashtop'd into it using my tablet. My work PC is on a corporate LAN, and not on the same network as my tablet. The company I work for provides wifi for personal devices, but they are not accessable to the internal network. I thought about going the Synergy route, however that would require my home PC to be able to connect to my work PC which isn't really possible. The opposite would work though, if I could reverse connect the server to the client, but the Synergy software doesn't really support that. I do have a couple linux boxes running at home, so I can ssh into my home network and tunnel ports via SSH if needed. With what I have, how can I accomplish seamless keyboard and mouse sharing between my work PC and either my home PC or my android tablet?

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• Solution for lightweight LAN peer discovering?

  - by DevilWithin

  I built a library for purely cross-platform programming. My games made with it run fine in Android , Pc, Linux, Mac etc. The networking capabilities are provided by ENET library, therefore all communication between my apps is not TCP or UDP compatible, but only in the custom protocol, even tough its based on the UDP ultimately. I don't think its possible to do what i want with ENET, thats why I ask here for help! Lets say I have the same game running in my Android phone, my laptop and my pc. They are all in the same wifi network, and therefore in a LAN, whether its Wifi hotspot(?) or the household router. I need each of those 3 peers to discover the other two in the network. This is meant only to find the IP of alive apps in the LAN network, to be able to host multiplayer games between them. I can only think of one effective way to do this, UDP broadcast, wait responses, but if that is the solution, i need something small, since its the only purpose of the implementation. Other way could be to try to connect to all IPs in the LAN address subrange, but I don't think the OS would be with me on this one :p Sorry for the long question!

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• Access VirtualBox-ed server from behind the router

  - by migajek

  I'm having the following configuration: Windows 7 hosting VirtualBox and it's guest: Ubuntu The machine (physical) which runs VirtualBox is behind the router and has the address of 192.168.0.110 VirtualBox runs the Bridged network, and the IP of VirtualBox-ed Ubuntu (eth0) is 192.168.0.200 Host (Win7) is running HTTP service on port 80, while guest (Ubuntu) is running it's service on port 9000 I can access both services from inside the network by typing the ip_address:port and this works fine. Both ports are forwarded on the router to their's respective IPs: 80 -> 192.168.0.110:80 9000 -> 192.168.0.200:9000 Unfortunately, accessing the router's external IP doesn't work as expected. While external_ip:80 works correctly, external_ip:9000 - doesn't I believe the problem is VBox - related, since the same network is running also other physical machine with Ubuntu and http service on 8000 and this one is forwarded correctly.

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• Can't ping IPs for devices not part of Windows Domain

  - by GiddyUpHorsey

  I have a home network with a Trendnet wireless router and a Windows Domain. The DNS server is on a Windows 2000 Server and is configured to forward queries to DNS servers provided by the ISP. The router provides DHCP and is configured with the Windows 2000 Server as the DNS server. When I connect iPhones to the network over WiFi, the router can ping the iPhones through its browser based admin interface, but Windows machines that are part of the Windows Domain cannot. A laptop was connected to the network over WiFi that wasn't joined to the domain and it could see the iPhones. All machines either have a fixed or DHCP allocated IP on the 192.168.0.* subnet. How do I configure the DNS server or the Windows Domain so that Windows machines can see the iPhones?

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• SSL Certificate for local web server

  - by Firefly

  Is it at all possible to create a self-signed certificate for use on multiple machines on a local network which would stop the browser complaining it is not a trusted site? We have a product which is basically a computer running lighttpd to serve a web interface for configuring the computer (sort of how a router has a web interface). There can also be many of these machines running on the same network with dynamic IP's. What I basically want to do is enable SSL for extra security but I don't want people who are on the local network to be given a browser warning about the certificate not being trusted. Is this at all possible?

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• How do I set my router up to authenticate with my service provider?

  - by João Lourenço

  Currently I have this setup: D-Link DSL2640U connected to the phone line: VPI/VCI 0/40, Service Category UBR Without PCR Service pppoe_0_40_3 Interface nas_0_40 Protocol Bridging (LLC/SNAP-Bridging) 802.11q not enabled Bridge Service Enabled Computers have individual PPPoE connections (in Network and Sharing Centre - Set up a new connection or network - Connect to the Internet - Broadband (PPPoE) - Username and Password) How would I move these settings on each individual PC to the router so that all I need to do is connect to the wireless? I have been unsuccessful setting up anything other than Windows PCs on the network (I have tried Macs, iOS and Nokia SmartPhones too). Thanks for the responses in advance!

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• Printing on Windows 8 64-Bit through Windows Server 2008 (32 Bit) RemoteApp

  - by Chris

  We have a network where our server is running on Windows Server 2008 (32 Bit) and a client computer is running on Windows 8.1 (64 bit) with a local printer attached to the client. The printer is an HP P1006. The remote app works well but when trying to print we get an odd "error 545". We have tried both using the "connect client printer" function in remoteapp and also making the printer shared over the network and printing to it via the network from within the remoteapp. Nothing works. We can print a test page from the server to the client computer just fine, but it seems from remoteapp we cannot. We have also tried installing the 32 bit drivers on the 64 bit machine as both the primary and secondary drivers but cannot get them to install. Suggestions please? We've been going crazy over this issue.

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• How cloudfront works?

  - by Dharmik Bhandari

  I'm planning to Implement CDN(Content Delivery Network) of Amazon which is known as CloudFront in ASP.NET MVC3 with c#. I've googled about it but little bit confuse about few things mentions below. Is it compulsory that we have to uploads all static resources to CDN Network first and then we can use or Is it manageable by Amazon to crawl site static resources which is predefine folder or directory of sites? Is Amazon automatic update its copies when we anything change in static resources or every time we have to upload updated resources to CDN network.

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• Ubuntu based VPN server behind NAT router?

  - by maartenn88

  I have a small intranet- and file-server inside our company, which can only be reached from inside our own network. I'd like to be able to reach the intranet and files on the server from outside the network, however I don't really like the idea of completely opening security by forwarding the ports on our NAT-router, so I'd prefer to enable a VPN possibility for this. So I have a router, which is the DHCP server and has NAT function, and I have an Ubuntu Server with the files and intranet on it. How do I configure these two so that I can make a VPN connection with my network in order to reach the server? thanks in advance for any answer!

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• switch duplicates packets and forward in two route

  - by sami

  there is a network including a router, two hosts and a switch which connects hosts to router. i have a virtual machine on my system. the network adapter is set to act as bridge. so the virtual machine and real OS are my 2 hosts on different LAN. they use one network card and are connected to a switch. when each of host send a packet to the other one, the switch duplicate the packet and forward it to both router and the other host. how can I solve the duplicate packet problem? Thanks.

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• No Other User In Task Manager Users Tab Windows 7

  - by Samuel Adam

  I want to ask why there is only me on Task Manager's Users tab. Originally I wanted to be able to chat with other clients on my local network using msg command, but I can't found any other user. How to see other users on the same network? I use Work Network, and all of the users is using wifi to connect. I googled about it, but no information is close enough. As much as a newbie question it sounded, I really appreciate any help. Thank you ! :)

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• Is the BCM4306 wireless card ipv6 capable?

  - by horroricane

  I've been trying to connect with ipv6 enabled networks with my Broadcom Wireless card under Ubuntu 12.04. The wireless card model is BCM4306. $lspci $Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03) $Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) I have been unsuccesful to connect through an ipv6 address, but I can still connect to a network when assigned an ipv4 address. While searching for an answer or a solution, I know the kernel can handle dealing with ipv6. So, what's left to question should be the hardware handling the connection. Unfortunately nothing comes up when I specifically try to search for information on BCM4306 ipv6 capabilities. I just tried using a wired connection to establish an ipv6 only connection to the network I'm on right now, but I got the same behavior of constant disconnections. Maybe it's not the hardware? I don't know.. I don't want to disable ipv6 on my machine as relevant networks I'll be connecting to will be using it exclusively, but I'm not sure what is wrong and which parts should I replace/fix to get this working.. Could someone please point me in a fruitful direction to get ipv6 working under Ubuntu 12.04?

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• Make BIND use DHCP DNS as backup

  - by cainmi

  I run BIND locally on my OS X machine, to enable wildcard Apache vhosts, which requires setting the DNS server for all network interfaces to 127.0.0.1. This works great, but means when I am on a network which uses an internal DNS server to route special (i.e. .companyname) URLs to a server on the network, the lookup fails. I tried adding both 127.0.0.1 and the DHCP provided DNS server, but this doesn't work either. Is there a way to make BIND use the DHCP DNS server for requests it cannot resolve locally?

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