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• How to configure dnsmasq to forward multiple DNS servers?

  - by xiaoyi

  I'm now using public DNS over VPN to avoid some DNS pollution in China. But this come with a price that I can't take advantage of CDN. Is there a way to configure dnsmasq and let it query both DNS servers, both public one and ISP one, and return the IP with a lower metric? I knew it could be done by using server=/domain/server directive to assign a DNS server for a certain domain, but the problem is there are hundreds of them. So I have to figure out something generic. Thanks in advance.

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• Are there other application layer firewalls like Microfot TMG (ISA) that do advanced http rules?

  - by Bret Fisher

  Since the old days ISA and now TMG have had several great features that I often want to deploy to my customers because of the enhanced functionality and security, but often the cost of an additinal server HW, Windows Server, and TMG license is too much to justify when compaired to a $300-500 appliance. Are there other gateway firewalls that can perform one or more of these application layer features: pre-auth incoming http traffic against AD/LDAP before sending packets to internal server (forms auth or basic creds popup)? read host headers of incoming http traffic (even on https) to a single public IP and route packets to different internal servers based on that host header?

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• Accessing non-port80 web server using IPv6

  - by logain

  In a normal IPv4 network, I can go into any browser such as Firefox and browse a server on a IPv4 address not hosted on port 80: (add http:// - Super user stops "new" users from adding links)192.168.42.6:8080/ This accesses the server on Port 8080 on 192.168.42.6. However, if I try this with a IPv6 IP, I get no luck. This tries to access port 8080 on fe80::520:ff0f:ece0:1 : http://[fe80::520:ff0f:ece0:1]:8080/ Firefox will automatically "fix" this URL to: http://[www.fe80::520:ff0f:ece0:1.com]:8080/ which does not help me access it at all. So either I am doing something really wrong OR there's something really wrong with IPv6. Couldn't find anything that even remotely helped on the Internet. (And yes, there is a server running on the IPv6 in question)

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• How to make WinServer's AD work with Linux DNS/DHCP on VMware?

  - by Borald

  Hope you're fine. I got 2 virtual machines : Windows Server 2008 with Active Directory installed. Linux that works as a DNS and DHCP Server I need to make them work together, but I don't if this is going to be possible because VMWARE is sharing the NIC with other virtual machines and computer itself. I've assigned different IP static adresses to the servers. Is there a way for me to make these things get interconnected and test them on some virtual clients ? Any help will be much appreciated... (useful links,tutorials,..) Thanks in advance !

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• DNS not responding

  - by Born2win

  I have a Dlink DIR-615 router and I have it around six mounths. My internet connection is VPN (PPTP) based i.e. I have been give a username and password from my isp and my ip address is dynamic. But from few days I am experiencing a serious problem. My router connects normally (i can see yellow light) but my computer is giving "DNS not responding" error. I have tried everything (reset,reboot etc) but no sucess. Any help would be appreciated :)

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• Dediced server for all network functions?

  - by Alan

  I want to set up a fictional network configuration for a school in my neighborhood. They have about 50 computers altogether, 2X20 in computer rooms for students and another 10 scattered around for various professors. They should all access the internet through a dedicated Linux router machine. What they would like is to have domain names for those three computer groups. Lab1, Lab2 and Professors. The computers in Lab2 and Lab1 should have static ip and should all be named by numbers. So there should be 1@Lab1, 2@Lab1.... etc. And the Professors network should have a DHCP, with authentication. Is it an ok solution to have all these functions on a single server? (The one which will be used as a router) Do I have to set a local DNS for domain naming? Do the host names for Lab computers have to be set on the clients, or can they be automatically assigned?

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• Windows 7 ipv4 autoconfiguration - cannot connect to internet

  - by GuiccoPiano

  I get my internet connection from a guy (lets call him my service provider henceforth). He gives internet connections to many students here in my hostel. My PC gets a private IP through his DHCP server. Now, when I switch on my WiFi, my PC gets a private IP as it should and I can connect to the internet just fine. But now when I connect my LAN cable, my PC gets some "Autoconfiguration IPv4 address" 169.254.110.154(Preferred) and I cannot connect to the internet. Here is the ipconfig /all output for ethernet port: Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Marvell Yukon 88E8059 PCI-E Gigabit Ethernet Controller Physical Address. . . . . . . . . : <<MAC DISPLAYED HERE>> DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::5054:a347:7d06:6e9a%11(Preferred) Autoconfiguration IPv4 Address. . : 169.254.110.154(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : DHCPv6 IAID . . . . . . . . . . . : 285222078 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-50-AC-68-54-42-49-EE-52-16 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 also tried: Start a command prompt as admin. Run "netsh winsock reset" Run "netsh interface ipv4 reset" Run "netsh interface ipv6 reset" Restart your computer. All this does not work. Any idea to solve the problem?

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• Setting up a externally facing server on Windows. How do i setup DNS/Nameservers?

  - by Jason Miesionczek

  So i have a domain name that i would like to host from my static ip internet connection. I have windows server 2008 r2 installed, and dns setup. The dns server is currently behind a firewall, and i have the appropriate rules to allow traffic to reach it. My question is, what entries do i need to create in the DNS so that i can have some nameservers to use at my domain registrar, so that the domain correctly points to the server? I know that most domains have nameservers like ns1.domain.com, ns2.domain.com, etc. What would i point those to in my DNS?

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• Windows Server 2008 SOMETIMES blocks connection to an FTP Site

  - by ssilver2k2

  Hello Everyone Recently, our company has been having issue connecting to a special FTP server that we use offsite to upload small files. We can connect to the test server perfectly fine, but when we use the production ftp, it only randomly connects. If I plug my laptop directly into the modem and pull one of our other static IP addresses, I can connect just fine, but if I use our internal network, it is hit or miss. Also, turning OFF the firewall does NOT change the status of our connection problems. It will still time out. The weird issue is that it sometimes works, and when it does, it instantly asks for credentials and logs us on for that session, but if we disconnect and try again, it may or may not work. This also coincidentally occurred after uninstalling hamachi, and it blew away our internet settings on our Windows Server 2008 box, but everything else is working fine, and it was working fine before hamachi was installed.

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• Clearos open vpn vs windows open vpn client where client connects with no default gateway

  - by Paul

  Am using clearos as open vpn server and configured my users on windows machine with open vpn client. My problem is that users connect to the server without a default gateway and also with ip conflicts, i can ping the server but i can not ping any user behind the server. please any one can help to find out what causes the clients to connect without a default gateway and also not to be able to ping any user behind the clearos open vpn server. Help with a step by step guide of installing open vpn on clearos and open vpn clients on windows. Thanks

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• WinXP workgroup, 3 routers 3 computers

  - by Silvera

  I have 3 computers with WinXP x86, and 3 Cisco 1800 series routers. I'm trying to create a workgroup so that the 3 computers can share files with eachother. They can ping eachother (without any internet connection), and the routers setup is correctly configured (with interfaces, ip adresses, and ports). But none of the computers can see eachother, even though they are on the same network. My first question would be - can it be done the way it is currently configured - and, if yes, how, or can anyone point me in the right direction?

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• vmware player - ubuntu can resolve hostname but ping fails

  - by recursive_acronym

  Using VMware players on Windows 7 with a Ubuntu 10.04 guest. When I ping it resolves the ip address but the ping fails. Hopefully this is a local issue as I don't have access to any of the network equipment (routers, etc). vmware tools is installed. Is there any other information I can provide to help resolve this? eth0 Link encap:Ethernet HWaddr 00:0c:29:83:4f:c0 inet addr:192.168.163.129 Bcast:192.168.163.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe83:4fc0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:475 errors:0 dropped:0 overruns:0 frame:0 TX packets:179 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:50006 (50.0 KB) TX bytes:16701 (16.7 KB) Interrupt:19 Base address:0x2024 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:480 (480.0 B) TX bytes:480 (480.0 B)

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• How to troubleshoot ping request time out [closed]

  - by user28317

  I have a Windows 7 and an XP machine connected to a NETGEAR wireless router. Both machines can log into the network and surf the web. Both are connecting wirelessly. I can ping the router from each machine and get a reply. I can ping each machine from the router and get a reply. But i cannot ping each machine from the other; getting a request time out. Subnet IP Addresses are 192.168.1.* Router =1; Win7 = 10; XP = 11; Firewall is currently off in both systems. Since i can ping from router im picking that not the problem anyway. If i try to ping from xp to win7 i get Request Timed Out. If i try to ping from Win7 to Xp i get destination host unreachable. What should i do now? Thanks

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• Remote connection to Mysql not working

  - by Fillipe Silva

  We have an application running with CodeIgniter and MySQL in cestacerta.com. Ther are two versions: One that is in production and it works perfectly, and one that is our Development version. This runs locally on my machine and the other developers. The development version needs to remotely connect to the database, and it rather suddenly stopped working. I've given permission to access any IP settings on the server. I can access the database through the MySQL Gui Tools. I have tested access to several different codes, including a newly downloaded version of CodeIgniter and always got the same error: "A Database Error Occurred Unable to connect to your database server using the provided settings. Filename: C: \ xampp \ htdocs \ cestacerta \ system \ database \ DB_driver.php Line Number: 119 " What troubleshooting steps can I take determine if the error is on our workstations (which all have the same error) or on our server.

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• DNS Zone file and virtual host question

  - by Jake

  Hi all, I'm trying to set up a virtual host for redmine.SITENAME.com. I've edited the httpd.conf file and now I'm trying to edit my DNS settings. However, I'm not sure exactly what to do. Here's an snippet of what's already in the named.conf file (the file was made by someone else who is unreachable): zone "SITENAME.com" { type master; file "SITENAME.com"; allow-transfer { ip.address.here.00; common-allow-transfer; }; }; I figure if I want to get redmine.SITENAME.com working, I need to copy that entry and just replace SITENAME.com with redmine.SITENAME.com but will that work? I was under the impression I needed a .db file but I don't see any reference to one in the current named.conf file. Any advice would be great and if you need more info to answer the question, don't hesitate to ask.

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• ftp server over internet using different port

  - by ???? ????

  I want to make my ftp server over the internet i made it on Debian linux computer and i changed the port of it to 201 my local ip is 192.168.1.3 so i can access it from any computer on my network through ftp :// mylocalip:201 it appear to me the login page i login with my linux user and can see the files on my ftp server to make it public i make port mapping on my router for port 201 when i try ftp :// mypublicip:201 it give me the login page and when i entered the login data it is loading infinity without open my ftp server files when i made it over default port 21 it works fine. can any one tell me what is the problem here?

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• Automatically reboot Windows8 if no internet activity

  - by GrapeCamel

  I have a media server located in a very inconvenient part of my house. Occasionally I will have to reset my router or it will reset itself. The issue is the PC loses connectivity for some reason, and I am forced to walk outside, around the house, into the basement, over a bunch of toys and weights and boxes, to push a button to reboot it. I would love to have it check itself every 5-10 minutes and auto reboot if it is unable to ping a given address/IP. Any ideas how to accomplish this?

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• How to connect to Google App Engine server in internal network iMac?

  - by Will Merydith

  I have 3 iMacs and a Windows machine on my home network, all connected via an Airport Extreme router. I'm developing Google App Engine applications locally on one of the iMacs, and can view applications using http://localhost:8080 (or whatever port I choose). How do I connect to those applications from other iMacs and Windows machines in my network? I've located the IP for the iMac hosting Google App Engine: 10.0.1.7. But when I try http://10.0.1.7:8080 from another machine it will not load the page.

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• virtualbox port forwarding - firewall config

  - by Roose

  i have a ubuntu host system with virtualbox running a windows server. In Virtualbox i have configured the network with a NAT interface and port forwarding for the RDP deamon running inside the vm. That works really well - i can connect to the windows rdp service over the internet. TCP *:3389 - *:3389 Now i like to restrict the access to the rdp service to only 3 public ip addresses and have no idea how to do that via iptables / shorewall. Something like: ACCEPT net:91.x.x.x fw tcp 3389 (shorewall rule) isn't working. Would be glad for any hint.

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• nginx automatic failover load balancing

  - by robinmag

  Hi, I'm using nginx and NginxHttpUpstreamModule for loadbalancing. My config is very simple: upstream lb { server 127.0.0.1:8081; server 127.0.0.1:8082; } server { listen 89; server_name localhost; location / { proxy_pass http://lb; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } But with this config, when one of 2 backend server is down, nginx still routes request to it and it results in timeout half of the time :( Is there any solution to make nginx to automatically route the request to another server when it detects a downed server. Thank you.

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• Setup IIS 7.5 with multiple website bindings and SSL?

  - by JK01

  On IIS 7.5 I am trying to achieve this with two websites: Default Web Site is bound to: (blank host header port 80 - http) (blank host header port 443 - https) go.example.com www71.example.com the IP address of go.example.com 2nd web site "Beta" is bound to: beta.example.com (blank host header port 443 - https) * using blank only because it doesn't seem to be possible to bind https to a named host header And both need to work with SSL. But I have these problems: When I type in beta.example.com, I see the go.example.com site instead I can not seem to add the SSL binding to both websites at once (I have a single *.example.com wildcard certificate). The beta site will not even start if I add the https binding to it. This is how I have set it up: What is the correct way to set it up?

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• Dhcp server change fail after successful importing to new machine

  - by Tathagata

  I transfered the configs of a dhcp server from one server to another both running Windows Server 2003 R2 following http [://] support.microsoft.com/kb/325473. The new server has a statically configured ip(outside the scope) like the old one. Stopped the server on the old, and started up in the new server (authorized too) - but when I ipconfig /renew from a client its network interface fails with all 0.0.0.0 (or 169...*). I read somewhere I need to reconcile the scope to sync the new registry values ('ll try this tomorrow). What other troubleshooting steps can I take other than these (which didn't help)? Things work fine when the old server resurrects and the new one is taken down. The new server showed there was no requests for offer.

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• best way to record local modifications to an application's configuration files

  - by Menelaos Perdikeas

  I often install applications in Linux which don't come in package form but rather one just downloads a tarball, unpacks it, and runs the app out of the exploded folder. To adjust the application to my environment I need to modify the default configuration files, perhaps add an odd script of my own and I would like to have a way to record all these modifications automatically so I can apply them to another environment. Clearly, the modifications can not be reproduced verbatim as things like IP addresses or username need to change from system to system; still an exhaustive record to what was changed and added would be useful. My solution is to use a pattern involving git. Basically after I explode the tarball I do a git init and an initial commit and then I can save to a file the output of git diff and a cat of all files appearing as new in the git status -s. But I am sure there are more efficient ways. ???

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• Forcing exact hostname match in IIS

  - by iis_newbie

  I am looking how to force an exact hostname match within IIS when using https. For instance, I want "https://works.mysite.com/resource" to be ok, but "https://noworks.mysite.com/resource" to return 404 (assuming they both resolve to the same IP). IIUC, the default behavior of IIS when going to "https://noworks.mysite.com/resource" is to get a cert warning, if the user presses continue, the user is able to access the URL. I was able to do this by generating a *.mysite.com SSL cert, and then specify the hostname within the bindings in IIS, but without the * in the beginning, the hostname field is disabled and blank. Am I missing something simple here?

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• What is the right way to use Internet Sharing in OS X?

  - by Bob King

  For a while now I've been using the Wireless in my Mac Mini as a seperate WiFi access point because my main router doesn't quite cover my whole house. There is a dedicated CAT 5E line down to the Mini, which has a static IP address. I've turned Internet Sharing on, using Airport/WiFi but it seems my options for security are limited. Can I do WPA2? Also, it seems like my iPhone only connects 25% of the time, and the rest of the time it claims I've given a bad password. I've tried "Forget this network" repeatedly.

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