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• Can qmail-ldap replace the validrcptto file?

  - by T. Fabre

  We are using qmail to route incoming mail to our Domino server. However, that requires us to maintain the validrcptto with the list of all allowed email addresses. Since Domino provides an LDAP directory, does qmail-ldap provide functionnality to lookup valid rcpt to addresses in the Domino directory instead of the validrcptto file, so that we wouldn't have to maintain that extra list ? We have about 150~200 users, so is setting up qmail-ldap worth the extra mile if it can verify addresses in the LDAP directory ? If anyone has experience with qmail-ldap and its setup, I'd be glad to hear from you.

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• Access to self created torrent on public tracker

  - by Nick

  Not sure if this is the right site to ask this, but here it goes: Let's say I'd like to share a couple of private files with a few friends. The size of these are quite large, so I've figured the best route to distribute these is via torrent. So, on my home PC I create a torrent and start seeding and announce to a public tracker like openbittorrent and publicbt. Now, both of those are public trackers, but they don't seem to have anyway of searching through what is actually being tracked. If I'm only passing around the torrent file to a few friends, whats the chances that someone else will 'randomly' come across the torrent via the public tracker and start leeching?

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• Serving static web files off a non-standard port

  - by Nimmy Lebby

  I'm close to deploying a Django project to production. I'm looking over some infrastructure decisions. Something that came up was serving static files with a different server such as lighttpd. However, we're starting off with a single dedicated server so our only option would be to use a non-standard port for the static file webserver. Is there precedence for this? I.e. Does anyone "big" do this? Any particular port I should use or shy away from using? Can anyone thing of some downsides of going this route?

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• SFTP through proxy

  - by aerodynamic_props

  I have a large amount of data on scratch space at computer b that I want to get. In my network I cannot directly connect to computer b (ssh exits with "No route to host"); I must first connect to computer a, and then connect to computer b. I cannot move the data from the scratch space on computer b to computer a because of a disk quota that is imposed on me at computer a. How can I move the data from computer b to my computer in this situation?

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• vmware workstation - virtual network adapters missing from ipconfig, still show in networking (XP host)

  - by Adam

  Hi Folks - here's a new one for me, and my first time posting here: I installed VMWare workstation 7.1 on a new PC. VMWare properly installs the virtual network adapters under the Network Connections control panel, however for some reason they do not show up under ipconfig, which is very weird. They also don't appear anywhere in "route print". I don't have network connectivity to the VM. My guesses are perhaps some conflict with Symantec AntiVirus or Symantec Client Firewall. Tried the following things: enabling TCP/IP in the virtual network adapters (they often get installed with it disabled for some reason) Restoring defualts in the VMnetcfg gui tool (this causes an uninstall and reinstall of the virtual network adapters on the host) Re-installing vmware workstation Uninstalling checkpoint secureremote and then reinstalling vmware Just to be clear, this problem is totally on the host. In my searching for stuff about (non-vmware) adapters missing from ipconfig, I see some posts about resetting the TCP/IP stack using netsh. Looking into that next... Thanks!

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• private subnet nat (openvpn / racoon)

  - by Jonas Schnelli

  I have a openvpn subnet 10.8.0.0/24 running one server and one client (laptop). openvpn works fine. Browsing the web over openvpn from the laptop works also fine. Now on the server there is a private subnet with 10.7.8.128/28. The subnet is set up with racoon (IPSEC s2s vpn). The s2s vpn allows me to access the subnet 10.3.5.0/24 at the other s2s vpn end. Works all fine when I'm connected with ssh to my server. From my laptop i can ping 10.7.8.129 (the servers ipsec local ip) but i cannot reach the net 10.3.5.0/24. I tried to add a static route on my laptop 10.3.5.0/24 over gw 10.7.8.129 with no success. Any ideas how i do setup the nat / routing? Thanks

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• How does a winkydink Teradici offer high res, full FPS, 3D rendering on ESXi 5 VDIs for AutoCAD/SolidWorks/1080p YouTube applications?

  - by BlueToast

  How does such a small Teradici card ![enter image description here][1] offer high resolution, full FPS 3D graphics (1:38) http://www.youtube.com/watch?v=eXA4QMmfY5Y&feature=player_detailpage#t=97s for ESXi 5.0/5.1 VDI environments? We're shooting for an AutoCAD/SolidWorks/YouTube 1080p capable environment. I can't see how such a small and low profile card could possibly have the horsepower to handle such GPU computations for a big environment like that. We're going to have up to 64 VDIs per server, and are a 500-1000 employee count sized company. Someone enlighten me please! Determining which route to go (between RemoteFX and VMware View/PCoIP) and the hardware (NVIDIA 4GB non-Quadro/Tesla GPUs vs Teradici card). Servers have three 4x, three 8x, and one 16x PCI-E lane. Two of the 8x lanes will be occupied by SAS RAID cards.

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• Network Role based routing

  - by Steve Butler

  Apologies my networking skills are a tad rusty. I'm looking for a way to setup a system that gives me the ability to setup Role-based access to specific network resources. For example, i have three private subnets for specific groups, users will need access to one one or more subnets. I'd like to have all client machines on the same subnet/vlan, and then use 802.1x to authorize into a router(NAC device/whatever), the router would then see what user had authenticated(huge plus if it could determine AD group), and then allow routing to one or more of the three private subnets based upon their group membership. I've looked at packetFence, and it appears to work by assigning a client to a VLAN, but i'd still need a way to route some users into different back-end networks.

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• VPN/Proxy server to bypass work proxy

  - by Trevor

  Here is my dilema, I am at work and can not set up a VPN connection to my VPN account in the USA. So what I would like to do is somehow have my "IE" at work connect to my home network and route any internet requests through my home PC to my VPN account, so I can access my USA Contents? So what I was thinking and I am not sure if this will work, but set up a proxy server at home on my home computer, that then routes all requests to my VPN Tunnel to the USA. Have my work computer use my home computer as the proxy and viola I have unrestricted internet access? Does that sound feasable? Thanks.

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• How to proxy and encrypt all my internet traffic with Win7 and Win2008R2?

  - by Malartre

  I have a Windows 7 laptop and a Windows 2008 R2 server. How can I encrypt and route all my internet request from the Win7 laptop to the Win2008R2 server? I guess the server would be called a proxy? Goal is to prevent unencrypted network snooping. I found this article about using SSH, but I would prefer an official windows integrated solution. What's the Microsoft "way" on this? http://lifehacker.com/237227/geek-to-live--encrypt-your-web-browsing-session-with-an-ssh-socks-proxy I would like this to work for all internet traffic, not just browser traffic and I would like to set this up on many Win7 clients. Carl

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• ARP replies contain wrong MAC address

  - by Jayen

  I've got a robot running linux with wired and wireless adapters. When I boot up, it connects to the wireless fine. When I assign an IP to the wired (either statically or with DHCP), it looks like it works. As in, ifconfig shows a proper IP and route shows proper routes. However, when I do an ARP request of the wired IP, the ARP reply contains the wireless MAC. ??? There's no bridge running on the robot, so why don't I get the wired MAC??? When the wire is disconnected, the wired IP replies to ping... Why is the robot replying over the wireless interface to IP requests on the wired???

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• Best way to split LAN computers on two WANs (not load balancing)

  - by lpfavreau

  What is the best way to split the computers of a LAN (about 50 computers) to go on two WANs, depending on the computers' IP address or computers' configuration (gateway). I'm not looking for load-balancing, I need to be able to route which computer uses which Internet connection. A solution would be to rewire the old office to split the two distinct groups that need to use two different Internet connections but I'm not sure it's worth it at the moment. I have a pfSense router configured with the LAN (DHCP), WAN1 and WAN2. I also have the IP addresses (and ability to configure) the next router on WAN1 and the one on WAN2. What would you suggest? Routing based on IP addresses ranges? Different gateways? VLANs would be difficult for the same reason as to why rewire is a bit complicated. Thanks!

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• Can I use the Airport Express as a an uplink between two networks?

  - by Ant Swift

  I have two separate networks using different IP ranges, 192.168.0.* for the wired only, isolated network and 192.160.1.* for the wireless only network which is connected to the internet. The wired network has a network printer setup and working and I want to be able to share it out to members of the wireless network (see diagram below). In short I need some kind of uplink between the two networks. Currently running a cable is out since there is no suitable route. I have a spare Airport Express and I am wondering if I could attach it to the wired network and have it join the wireless and act as the uplink between the two. Anyone know if the device is capable of this?

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• SMTP and IIS maild from my website

  - by RupDog

  Hi, I am using the free version for Google Apps to host my mail. I want to set is so that mail is routed via google apps as this will give me a much better reputation and mail will not go to the spam folder as much. Doe anyone know how this is done? Would I need to setup IIS to do this? The site is writeen in C# ASP.NET. So Could I perhaps just update the web.config file to route mail via google apps?

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• Routing between two VLANs on Single Dell 6200 Switch

  - by jenglee

  I want to be able to route between two vlans that I have created and I am not sure how to go about it. So I have created, VLAN 5 with IP Address 192.168.5.1/24 and VLAN 10 with IP Address 192.168.0.1/24 //main IP addresses that I use. How would I be able to get (for example) the IP Address 192.168.0.144 to see any ip addresses in 192.168.5.1/24? Also do you have to set a default gateway for each VLAN or do you set the default gateway for the switch.

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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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• Connecting via ShrewSoft VPN client means no LAN internet access (Windows 7 64 bit) - any advice please?

  - by iwishiknewmoreaboutnetworking

  I have a Windows 7 64 bit desktop machine which is connected to a LAN. I recently installed ShrewSoft VPN client v 2.1.7 on my machine so that I can connect to a license server hosted by my customer. They are running a Cisco VPN server and I originally tried (unsuccessfully!) to use the Cisco VPN client for Windows 64 bit but the default gateway wasn't being configured correctly after loading in my pcf file. Using ShrewSoft I am able to import the same pcf file, and successfully connect to the machine I need to using the VPN client software. The client machine I need to connect to has IP address 1.52.90.33. The problem is that when I am connected to the customer network using the VPN client application (and after a few minutes) I lose my LAN internet connection. I can only presume that this is because, by default the ShrewSoft VPN client application automatically tunnels all traffic through the VPN connection. I know there is an option to switch off the "Tunnel All" option on the Policy tab of the application and enter a Remote Network Resource (to "Include" or "Exclude") as "Address" and "Netmask" IP addresses however I am not sure what I need to enter here. Here is my ipconfig output before connecting to the VPN (with suffixes blanked out): Windows IP Configuration Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : ***.*** Link-local IPv6 Address . . . . . : fe80::8de3:9dbe:393a:33ba%11 IPv4 Address. . . . . . . . . . . : 150.237.13.17 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 150.237.13.1 Tunnel adapter 6TO4 Adapter: Connection-specific DNS Suffix . : ***.*** IPv6 Address. . . . . . . . . . . : 2002:96ed:d11::96ed:d11 Default Gateway . . . . . . . . . : 2002:c058:6301::c058:6301 Tunnel adapter Local Area Connection* 9: Connection-specific DNS Suffix . : IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e76:2cf9:38c4:6912:f2ee Link-local IPv6 Address . . . . . : fe80::2cf9:38c4:6912:f2ee%12 Default Gateway . . . . . . . . . : Tunnel adapter isatap.***.***: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : ***.*** Here is my route print output before connecting to the VPN: =========================================================================== Interface List 11...20 cf 30 9d ec 2a ......Realtek RTL8168D/8111D Family PCI-E Gigabit Ethern et NIC (NDIS 6.20) 1...........................Software Loopback Interface 1 14...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter 12...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface 13...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 150.237.13.1 150.237.13.17 2 127.0.0.0 255.0.0.0 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 127.0.0.1 306 150.237.13.0 255.255.255.0 On-link 150.237.13.17 257 150.237.13.17 255.255.255.255 On-link 150.237.13.17 257 150.237.13.255 255.255.255.255 On-link 150.237.13.17 257 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 150.237.13.17 257 255.255.255.255 255.255.255.255 On-link 12

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• pptp VPN, routing

  - by Adrian

  Details: eth0 = current internet port pptp1 = VPN connection, if I connect to my provider, he give me an IP address, which is accessible from the internet. This is what I need. I want to connect through this IP back to my PC. I want to keep my primary internet connection (eth0) on my PC for all traffic, but route traffic to VPN for specified application/or port, to access application/port from the IP, which I given from the pptp provider. Huhh? Difficult but, it is possible? If yes, how? Incoming port will be always: 33340 Outgoing port can be change, but usually it is 33330

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• Windows 7 laptop license

  - by Sheldon Ross

  I use Ubuntu almost exclusively. But, in order to buy the laptop I want, it's bound to come with Windows 7. I could always go the EULA refund route and try to get a refund for it. But I was wondering if there was anyway I could transfer the license I bought via the laptop to a a desktop PC. I have desktop running XP right now that I wouldn't mind having windows 7 on. Is there anyway I could transfer the windows 7 license from the laptop, install Ubuntu on it and install windows 7 on my desktop? I have no need for 7 on a laptop, as I won't be playing any games on it.

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• Has ec2 made self-hosting possible for 'amateur' sysadmins possible?

  - by Blankman

  I'm a developer, and it seems ec2 has made it possible for a amateur sysadmin like me to setup and maintain a fairly large set of servers. Now I don't mean to undermine real sys admins, as I know the value of them but what I am trying to get at is that someone like me can setup and maintain a cluster of servers (front end web servers, with some db servers) using tools like ec2 and capistrano with the help of google. Now this isn't something I would do as a long term thing, but as a startup, one-man operation, I think I can pull this off until business takes off and I can hire this important role out. With ec2, I get my firewall, so I basically open up port 80 on my public facing server, which will run haproxy and route requests to my cluster of servers. Ofcourse I am simplifying the setup, but just want a feel for what you guys think about my perception. My application is a web application, that will be runing Ruby on rails (passenger) and talking to mysql or postgresql.

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• How can I setup a Firewall without NAT?

  - by SRobertJames

  We have 16 IP addresses from our ISP, and are setting up a SonicWall Firewall. I'd like to have the SonicWall do NAT for the LAN, but act as a firewall only (no NAT) for the servers which are using some of the 16 addresses. How do I set this up? If I set the WAN's subnet to include the 16 IPs, the SonicWall won't route the traffic to the LAN interface. Should I set the WAN subnet to only include the ones we are dedicating for NAT, and then keep the others on the LAN? Related point: How can I set multiple IP addresses for a SonicWall LAN interface?

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• Is it possible to change error messages for users connecting to network printers?

  - by eric.s

  We are cleaning up our print server (Win XP). To test that printers are no longer really there we have set up some tests. These tests have left us with 176 questionable printers. We have now set Print access to Everyone to Deny. Testing shows this gives the user a 5 Access is denied. message. We would like to change this message for the user, so when they call our workstudy's who answer the phone do not interpret this as a computer rights management issue and can route the call properly. Is it possible? Is this error number system wide, or just for printing errors? If it's not a system wide error where might the string for this error be?

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• Freebsd Box hangs on boot loader

  - by user19039

  I have a freebsd box that seems to not want to boot past the boot loader. It wont go past the initial boot loader phase and just lists the version number for the boot loader(btx loader). It hangs there. I am not a fluent freebsd admin and decent at command line, however I can tell clearly it wont get past and boot past the disk. Loaded up rescue cd, mounted the drive. Couldnt get fsck going without seg faulting How do i get this fixed? I have a live cd.... just curious which route to take.

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• Windows Proxy Server advice

  - by Scott

  I have a webserver that currently has about 10 IP addresses. I have various clients that require a proxy server to route their internal traffic through. The load is not that great, so I'd like to have this ONE server act as a proxy server for 10 different clients, each client having their own unique IP on the server. The hardware is already setup, but I'm wondering what software solutions you guys recommend? I've looked at WinGate, Squid-Proxy, etc...but am pretty green with this. Maybe there's even a way to have Windows do this natively? I'm running Windows Server 2008, 32 bit.

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• How can I use mobile network account at server so home sync works

  - by Mike Gallagher

  I would like to be able to use a mobile network account while sitting at my server. I had os x server 10.6 running on a mac mini server but recently got a new quad core iMac and want to take advantage of the extra power. My problem - I can sit at the server and log into the mobile network account but can not get it to sync back. When I attempt to sync it get error message that the afp share point is unavailable and that the files are hosted locally. My goal is to be able to use the new iMac as the server and set a user account so that it remains synced so when the account is accessed from other clients, particularly my macbook pro. Is mobile account the best route? Would an external account be a better option. Any advice or ideas of where to read up on this would be much appreciated.

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