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• How can I make my Ubuntu server accessible to the internet ?

  - by wahid

  Hi, I already installed applications to make my server web server. when I type the DHCP released ip address in the web browser, i can access it but all it says is "it works....etc". I can copy files to /var/www successfuly using WINSCP but yet, i can not see any files when I connect to it using my windows machine in the browser. Secondly , I tried to forward port on my home SMC router, it only accepts local lan ip which my ubuntu server picks up internet ip from router...what should i do ? can you help please ???? Thanks,

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• Load balancing + NAT issue on BNT GBE 2-7 gear

  - by Clément Game

  Hi guys, I've got troubles configuring an Hardware load-Balancer with NAT functions. I have the following architecture: Internet === VIP (public) LB (private ip) ==== private addressed servers When a connection is initialised from the outside (internet) , the LB correctly forwards the SYN packet to one of the private servers. But when these servers want to reply with a SYN/ACK there is a problem. the initial SYN packet had as ip header : VIP = Private_server_Address But the private servers cannot reach VIP from their side (this is normal since it's nated), and then provide a correct reply. Have you guys any solution to correctly forward the packets to their correct destination ? Note: The load balancer, which is the default gw for the servers, also has a NAT rule for "masquerading" (actually more SNAT than real masquerading) Regards, Clément.

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• PDAnet on Android IP on PC is not public IP. Where does the NAT take place, PDAnet or Verizon?

  - by lcbrevard

  When using PDAnet on a PC (Win7 ultimate) to USB tether a Motorola Droid on Verizon 3G the IP address of the PC appears to be public - 64.245.171.115 (64-245-171-115.pools.spcsdns.net) - but connections show as coming from another public IP - 97.14.69.212 (212-sub-97.14.69.myvzw.com). Someone is performing Network Address Translation - either PDAnet or within the Verizon 3G network. Can someone tell me who is doing the NAT? Is it PDAnet or is it at Verizon? Is there any possibility of setting up port forwarding, such that connections to the public IP 97.14.69.212 (212-sub-97.14.69.myvzw.com) are forward to the PC? We are testing a network protocol that requires either a true public IP or forwarding a range of ports from the public Internet to the system on which the software runs (actually Linux hosted by VMware Player or Workstation on a PC running Windows).

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• How do I move *all* the installed software on my EC2 isntance to EBS?

  - by drhyde

  I got started with Eric Hammond's great article over at http://aws.amazon.com/articles/1663 where he goes through installing MySQL and configuring it to use EBS. I got that going. I also have a lot of other stuff installed on that EC2 instance: Rails, a bunch of gems, Nginx+Passenger and so on - my understanding is that unless I explicitly configure it to use EBS, all of this sits on the EC2 instance's ephemeral storage - right? How can I move all the software I have installed to EBS - or better yet how can I set up such that going forward also any new gems etc that I install also go to the EBS volume?

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• Microsoft DNS Server (Windows 2008) CNAME issue

  - by Lukes123

  I am using the DNS role in Windows Server 2008 R2. I have my records set up correctly with the following CNAMEs: {removed domain names for security} Currently, only the 'wsp' cname works. All the records are identically set up. I have checked with a DNS checker, and the other two CNAMEs do not resolve to anything. I have tried restarting the server, re-creating the forward lookup zone. Can anyone see what is wrong? 'A' records work fine when set.

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• Port forwarding with DNAT and SNAT without touching other packets

  - by w00t

  I have a Linux gateway with iptables which does routing and port forwarding. I want the port forwarding to happen independent of the routing. To port forward, I add this to the nat table: iptables -t nat -A "$PRE" -p tcp -d $GW --dport $fromPort -j DNAT --to-destination $toHost:$toPort iptables -t nat -A "$POST" -p tcp -d $toHost --dport $toPort -j SNAT --to $SRC $PRE and POST are actually destination-specific chains that I jump to from the PREROUTING and POSTROUTING chains respectively so I can keep the iptables clean. $SRC is the IP address I'm SNATing to which is different from the gateway IP $GW. The problem with this setup is that regular routed packets that were not DNATed but happen to go to the same $toHost:$toPort combo will also be SNATed. I wish to avoid this. Any clever things I can do?

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• Can I set Windows default second-monitor behaviour to "Extend these displays"?

  - by MT_Head

  I travel to multiple offices (and multiple desks in those offices), and whenever possible I plug an external monitor into my laptop. Whenever I plug in a monitor I haven't used before, Windows defaults to "Duplicate these displays" - which messes up the arrangement of icons on my desktop if the external monitor is a different shape from my laptop's monitor. I then select "Extend these displays", and my laptop screen returns to its original shape - but my icons don't go back to their original arrangement. Grrrrr. Fast-forward a few days or weeks; I've got my icons arranged so I can find stuff again - then I go to a new office and it starts all over again. I'm tired of this. Is it possible to make "Extend these displays" the default behavior? I'm using Windows 8 x64 Home Premium, but I had the same complaint under Windows 7 x64 Ultimate. (Prior to that, I hadn't discovered the joy of dual displays. Ah, the time I wasted...)

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• Running multipul lines through a server.

  - by Kevin Roberson

  I am looking to buy numbers in bulk on DIDx.net. After I purchase the numbers in a particular area code, I want to forward those numbers to other numbers that are outside of that area code. This way it will be seen as a local call versus long distance. I have the customers but I don't have the system I need. I have read about Asterisk, VOIP, SIP, and BYOH. But I have no clue what will be the best system for me. Does anyone have any idea what my next step should be when it comes to hardware and software? Or what type of operating system I should use? I basically want to set up a system like GoogleVoice & Phonebooth.

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• How do you configure recycle bins on roaming profiles?

  - by Zombian

  I copied the following from a post on the Spiceworks forum which remained unanswered: Is there any way to place the Recycle Bin back on the desktop of a Roaming Profile with the Desktop being redirected? I have used Google and can't find a straight forward answer. I am asking for people with experience in this. This is for a Windows XP machine. I saw mention of needing to use a program such as Undelete but I'm hoping that is not the case. Further explanation: I use redirected folders and whenever a user deletes something from their desktop,my documents it doesn't show up in the recycle bin. It doesn't appear in the recycle bin on the server either. Where is this data? I doubt it is permanently deleted. Is there a way to change the recycle bin on the users' desktop to display those files? Thank you!

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• Resolving host names to their domain name in an internal BIND domain

  - by Adam Plumb

  I'm setting up a domain on my home network for learning purposes, using BIND on CentOS to act as the name server. I've got the name server up and running as type master for my internal domain (plumbnicoll.family), and can do forward and reverse lookups from other computers in my LAN. For example, host office2.plumbnicoll.family correctly returns office2.plumbnicoll.family has address 192.168.1.3. What I'd like is to be able to resolve just office2 to its address, without needing to put .plumbnicoll.family at the end. Is this possible, or even desirable to do? I'm running a mixed environment at home with both Linux and Windows computers.

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• Can Squid 2.7 proxy gzipped content

  - by Tom Styles

  We have a forward proxy for our network which is Squid 2.7. This is managed for us by a third party. We noticed recently that http requests going from our network to the web were having the Accept-Encoding header removed. This was resulting in all web traffic across our network (approx 8000+ PCs) being uncompressed even though the browsers and server on each end were capable. We have asked the third party to look into this and they have said it is because Squid 2.7 does not support compression. I understand this to be true but I was under the impression that the compression happened on the webserver rather than the proxy. So... Can Squid 2.7 proxy and/or cache content that is gzipped? If it can, how/why might it be configured such that the Accept-Encoding header is being removed?

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• Replacing old server with new but different hostname & same IP

  - by MaxFr

  We have an old server 2000 and lots of users point to it by hostname and by its IP e.g \\server1, we have a new server 2008 R2 with new name serverlocation1 All folders and data have been sync'toy'd from the old server1 across to serverlocation1 each evening, the new server tree is exactly the same on the new server and all perms are correct. We need to make the new server the same IP as the old server1 as too many people access it directly via IP, and to ensure file and folder paths stay ok, anything \\server1\folder\file needs to go to \\newserverlocation1\folder\file etc I can change the old server1 name to server1-old & change IP and assign the old IP to the new server, but how do I force anything coming in for \\server1 to go to the new server and ensure anything referenced to the old server goes onto the new server ? I can CNAME but I need the new server to have the IP of the previous server so not sure if its straight forward etc..... point server1 to newserverlocation1 Then probably change DNS so that the OLD IP points to new hostname..... Any clarification appreciated.

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• What is the right iptables rule to allow apt-get to download programs?

  - by anthony01

  When I type something like sudo apt-get install firefox, everything work until it asks me: After this operation, 77 MB of additional disk space will be used. Do you want to continue [Y/n]? Y Then error messages are displayed: Failed to fetch: <URL> My iptables rules are as follows: -P INPUT DROP -P OUTPUT DROP -P FORWARD DROP -A INPUT -i lo -j ACCEPT -A OUTPUT -o lo -j ACCEPT -A INPUT -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT -A OUTPUT -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT What should I add to allow apt-get to download updates? Thanks

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• How to intercept and manipulate DNS queries?

  - by emtunc

  I'm not sure if I worded the question correctly to be honest but basically what I want to do is: When a user types in something like Expenses in the URL bar of a browser, I want the browser to be directed to a specific web address (very very similar to how OpenDNS shortcuts work) The IP address of the web address will not change amongst the different 'shortcuts'... i.e: mycompany.com = 10.0.0.0 mycompany.com/expenses = 10.0.0.0 mycompany.com/tracker = 10.0.0.0 When a user types expenses in the browser address bar and presses enter, I want the browser to automatically direct to the specified address as above. Would this be tricky to implement? I hope I have put my question forward appropriately :-) Additional notes: We are on a Windows envionment I believe the exchange server is running as the DNS server in the office

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• Reverse proxy with SSL and IP passthrough?

  - by Paul

  Turns out that the IP of a much-needed new website is blocked from inside our organization's network for reasons that will take weeks to fix. In the meantime, could we set up a reverse proxy on an Internet-based server which will forward SSL traffic and perhaps client IPs to the external site? Load will be light. No need to terminate SSL on the proxy. We may be able to poison DNS so original URL can work. How do I learn if I need URL rewriting? Squid/apache/nginx/something else? Setup would be fastest on Win 2000, but other OSes are OK if that would help. Simple and quick are good since it's a temporary solution. Thanks for your thoughts!

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• root domain to www forwarding issue

  - by user182332

  I want to forward my root domain(yourdomain.com) to www.yourdomain.com Should I delete the A record of the root domain and then setup 301 permanent forwarding to www.yourdomain.com? I am hosting my app on heroku. So I don't really have an IP address to setup an A record. The thing is I first deleted the A record of my root domain and then forwarded it. I pinged it and here is the result - ping yourdomain.com ping: cannot resolve yourdomain.com: Unknown host Update and some more information - I am hosting a static website. And managing the DNS on cloudflare.com I added an A record for yourdomain.com - 184.168.221.51 Just an random IP.

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• Advanced call forwarding in Skype

  - by Ivan

  Hi all, I'd like to forward calls from a Skype account to another Skype account (both online), but so that it calls and then enters a number. E.g., I have two accounts: acc1 and acc2. I want all calls from acc1 to be forwarded to acc2, and when the call is established to enter "#123". Is that possible? Thanks. EDIT: The question is basically how to call a user and add the extension directly, before the call has been established (e.g., to call directly acc2:#123).

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• Monitoring the wall time of a process on windows?

  - by Sean Madden

  Windows Task Manager has the ability to show the current CPU time of any given running process on windows, is there any way (not necessarily through Task Manager) to get the current wall time of a process? An example, let's say I have a script that reliably runs for about 45 minutes. Without adding a progress bar to the script, is there any way to figure out for how long it has been running? The math behind this seems pretty straight forward; WallTime = CurrentWallTime - WallTimeProcessStarted. Likewise, since the math is so simple, is there anyway to get the time that a process was started at?

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• Network with bridge and port forwarding?

  - by rafek

  Hi! Below is my current (and planned) home network configuration. I would like to connect my non-wifi-capable desktop to my home network. The question is: HOW? What device do I need? The primary requiremen is that I need to be able to forward ports to my desktop. How would I achieve this? Is there something like "double port forwarding"? Could anyone please explain this configuration to me? Thank you in advance!

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• ssh into my mac from my ipod

  - by mechko

  Ok so this is what I got, but it don't look right... The set up is as follows: My Mac is on a wireless network, presumably behind a firewall over which I have no admin privileges. Further, said wireless network changes my internal IP randomly at random times, so I do not know what my ip is. Note that localhost is a variable ip I forward some port or the other to my dns: ssh -R 19999:localhost:22 sourceuser@remotehost connect to my remotehost from my machine: ssh sourceuser@remotehost and then connect to the port I forwarded: ssh localhost -p 19999 [solved] Second question, there are a bunch of ssh clients for the iphone. Which one should I use? EDIT: Since jailbreak is not illegal, simply frowned upon by the Corporation, I've decided to go with that. I have a nice shell with openssh and the works. Best of all, it's free and it does exactly what you expect.

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• Amazon AWS EC2 instance pricing

  - by iss42

  It seems to me that Amazon obfuscate their pricing somewhat. So if I were to create a "m1.medium" instance and run it say 4 hours a day what would I be charged per month? (assume nothing else needed) You'd think this would be straight forward to answer, but I don't see a clear answer anywhere. This tool: http://calculator.s3.amazonaws.com/calc5.html Gives: $22.21 If I set it to 1 hour is gives: $5.65 But is this correct? The m1.medium has a Local storage of 410gb... I assume that this is persistent, but is it charged for? In the tool from Amazon this is not implied or suggested or hinted at. Any guidance would be most appreciated!

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• Running Tomcat 7 and Apache 2 on the same server

  - by Thorn

  Part of my site needs to run over HTTPS and I'm creating a sub-domain for that part. I have apache httpd 2 AND Tomcat 7 running on the same server with the same IP, Apache is on port 80 of course, while Tomcat is running on port 8080. Right now I am doing domain forwarding for requests that need to run off tomcat. For example, mathteamhosting.com/mathApp can forward to mathteamhosting.com:8080/mathApp. I would like to have Tomcat handle the https requests for that subdomain. I don't think this forwarding technique can work in this case. How do I set that up so that Tomcat receives the requests on port 443 while apache handles port 80. To be more specific: http://proctinator.com == request goes to Apache web server https://private.proctinator.com == request goes to Apache web server

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• How to show users the reason for a message being bounced or rejected by Postfix?

  - by Ross Bearman

  A user would like to be able to view a web page showing any emails that a Postfix server has either been unable to send, or unable to receive. For example if the user was supposed to receive an email from a third party but it hasn't arrived, they'd be able to check the web page and see a list of emails rejected by Postfix, along with a clear reason as to why. I've been unable to find an existing application that offers this functionality. Does anyone know of any, or is the best way forward to write a script that parses the log and display the results?

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• Virtualhosts - best way of dealing with it?

  - by axqe56

  I'm competent at the basics of Apache, PHP and virtual hosting but have a question about virtual hosting. As far as I'm aware, HOSTS files can only be in one of the following locations: C:/Windows/system32/drivers/etc (varies in older installs, I believe) I don't think it can be put elsewhere for use with Apache, simply for virtual hosts, and the main HOSTS file for blocking sites etc. I heard about PAC files on Uniform Server's website (http://wiki.uniformserver.com/index.php/Virtual_Hosting:_PAC) but they're browser-specific though, aren't they? What's the best way to deal with virtualhosts, other than HOSTS file? My server isn't currently open to the internet yet, but if it is, what's the best way to resolve DNS for my virtualhost domains if it were to become forward-facing (i.e open to the internet)?

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• Is email forwarding to the sender's address usually blocked in Mail servers / MTA?

  - by codecowboy

  I've noticed that email forwarding to an address seems not to work if I send an email from the address to which I am forwarding email. This happens for GMail and Fasthosts mail servers. e.g I send an email to [email protected] from [email protected] , [email protected] is set to forward to [email protected] and the email never arrives. I realise this seems logical but it is a potential cause of confusion when testing email functionality in a web application (for me, anyway ;-). I would just like to know if this is standard for all MTA software so I can avoid confusing myself.

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