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  • Am I able to forward traffic from an external subdomain to a specific local host?

    - by George Bowman
    I apologise in advance if the question doesn't make sense, please let me know. I've got a small LAN (~10 Virtual Servers) using Win Server 2008 as a DNS server. This is behind a smoothwall express 3.0 firewall with ports forwarded for specific services. I have a domain (123-reg) with the NS's that of afraid.org (DynamicDNS) and subdomains pointed to my (Dynamic) IP address e.g. subdomain1.example.com - 123.456.789.101. I think that adequately explains my set up. My question is, am I able to have subdomains e.g. subdomain1.example.com only point to a specific local host? Like so: subdomain1.example.com:80 - firewall(external facing) - server1.example.com:80 subdomain2.example.com:80 - firewall(external facing) - server2.example.com:80 I don't actually necessarily want to use port 80, otherwise I would just use VirtualHosts on apache, it is just an example port. Currently I can use either subdomain1.example.com OR subdomain2.example.com and they will both point to server1.example.com:80 I do not have to stay using Win Server 2008 for DNS, I am more than happy to move over to BIND if needs be, it was just easier to use Win Server 2008's DNS. I do not know if this is even possible, I have a feeling it isn't as I've only got one external IP address but any information is useful!

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  • Ubuntu server apt-get says "(-5 - No address associated with hostname)"

    - by Srini
    I have a ubuntu 12.04 server. Running sudo apt-get update on it produces errors like this: W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/precise-backports/main/binary-i386/Packages Something wicked happened resolving 'au.archive.ubuntu.com:http' (-5 - No address associated with hostname) I am able to ping all the other hosts on the network and also Google's DNS 8.8.8.8. But am unable to ping www.google.com. So, I'm guessing something is wrong with my DNS setup, but not sure what. I use static IP and my /etc/network/interfaces looks like this: auto eth0 iface eth0 inet static address 192.168.1.50 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.0.255 gateway 192.168.1.1 #dns-nameserver 203.12.160.35 203.12.160.36 #nameserver 203.12.160.35 203.12.160.36 My /etc/resolv.conf and /etc/resolvconf/resolv.conf.d/base are both empty and my /etc/resolvconf/resolv.conf.d/original says: nameserver 192.168.1.1 Any help would be greatly appreciated. P.S. I've googled it a bit and the common resolution is to switch to DHCP which I don't want to do since this is my home server. Thanks Srini

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  • Pinging computer name in LAN results in public IP?

    - by Bob
    Hi, I recently introduced a new machine to my LAN. The computer name for this machine is 'server'. Historically I've been able to access machines from my home network (from a web browser or RDP) using the machine name and it resolves to a local IP address just fine. However, I can't seem to do this anymore. When I ping the computer name, I get the following: C:\Users\Robert>ping server Pinging server.router [67.215.65.132] with 32 bytes of data: Reply from 67.215.65.132: bytes=32 time=24ms TTL=54 Reply from 67.215.65.132: bytes=32 time=23ms TTL=54 Reply from 67.215.65.132: bytes=32 time=24ms TTL=54 Reply from 67.215.65.132: bytes=32 time=24ms TTL=54 I notice also that it appends the 'router' suffix to my domain name for some reason. 'router' is the name of my router, obviously. I'm also using OpenDNS as my DNS provider (configured through my router so it gets passed down through DHCP). Why is this not working for me? Can someone explain how the DNS resolution should take place? For LAN resolution, it shouldn't go straight to OpenDNS. I thought that each Windows machine kept it's own sort of "mini DNS server" that knows about all machines on the local network and it first tries to resolve using that. Please let me know what I can do to get this working!

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  • Hostname vs webpage domain.

    - by Mark
    Hi All, Im just starting to look at deploying a webpage and get into the joy of DNS etc. And im wondering how you set up multiple web-servers all with thier own hostnames/public IP addresses, and yet have them serve up a webpage from one domain. For example, lets say you have a website example.com, and an A record in DNS that points at it's IP address of 1.2.3.4 . You want to have two servers, prod1 and prod2 with some kind of load balancer in front of them for fail over reasons. The way I see it you would want to have the hostnames of these servers as prod1.example.com and prod2.example.com and perhaps loadb.example.com. How would you set up the DNS so this would all work. ie you could ssh to any of the server domains, prod1.example.com, prod2.example.com or loadb.example.com and also just use the www.example.com url to go to the website. And would all these server names be resolvable from the public internet and is that safe? This would be a linux environment, for arguments sake ubuntu, a django framework dynamic website, running in apache 2.2 Cheers Mark

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  • Enterprise Redirection Services?

    - by Aaron Alton
    This is probably a case of "if I new what it was called, I could google it in 5 minutes" - but I don't know what it's called. It's probably best to explain the requirement using an example. We have a number of services (vpn, owa, etc) which we host from one of our datacenters. We have a number of datacenters, and we technically have the infrastructure already in place to support these services at a number of our datacenters. To provide access to these "services", I would create an external DNS entry (ex. VPN.MyCompany.com Gateway IP for one of my DCs), and clients will connect to it via the DNS entry. Since I have multiple datacenters that can support this service, I could theoretically offer a "highly available, geographically dispersed" solution if I could point this DNS entry to some sort of third party who offers highly available "redirection" services. If my primary site goes down, I could just make a change via some management console and configure the redirector to point to a different DC. Of course, it would be fairly straightforward to set this sort of thing up on one of our servers, but that would kinda defeat the purpose of a highly available third party. Is anyone familiar with a service like this? I'm thinking something like DynDNS, but with Enterprise availability guarantees.

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  • How do i Setup a Mac OS X Server - NameServer behind an Airport Extreme?

    - by basilmir
    I have a Mac mini server i want to setup to host a couple of things. My setup is as follows: The WAN connection (static IP and ISP nameservers) goes into the wan port of the Airport Extreme. The Mac mini server is connected to one of the ethernet ports. The mac mini will host my domain something.com. My settings so far: Airport Express gets: 96.x.x.x as the external static IP from the ISP 174.y.y.y as the nameserver Mac mini server always gets a reserved DHCP IP from the Airport Express: 10.0.1.3 is the server's ip 10.0.1.1 as the dns (this ip is the airport express itself) My dns server has an A record pointing to ns.something.com and a PTR doing the reverse. I've already added my 96.x.x.x to point ns.something.com with my registrar as attached. NOW: Nobody seems to be able to access my ns.something.com to resolve any of my records. From a any computer in my network I CAN see my ns and everything works. The outside on the other hand does not... it's as if the airport extreme which "holds" the exterior 94.x.x.x address doesn't pass DNS along to my 10.0.1.3 ns server. I have the server managing the airport. Isn't this supposed to work?

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  • Apache Virtualhost entry with Windows hostname

    - by gshauger
    I have a Windows Domain Controller and we use it for DNS for our internal network. I have an Ubuntu box with an IP address of 172.16.34.149. Within the Windows DNS I created the forward and reverse lookup entries for the name Endymion. Naturally when ever I FTP/SSH/HTTP/etc to the hostname Endymion it resolves correctly to my Ubuntu box. I wanted to do some web development on this box for an existing site. There were problems when I placed the website in a subfolder of /var/www/. Let's just say it was in folder /var/www/projectx/. The issue involved the incorrect resolution of non-relative urls. So I figure I could create a new DNS entry for the hostname projectx. Sure enough when I FTP/SSH/HTTP/etc to the hostname projectx it takes me to the same ubuntu box as the hostname Endymion...this is what I would expect. I now have two hostnames for the same box. I then create a Virtualhost entry in httpd.conf that looks like the following: <VirtualHost *:80> DocumentRoot /var/www/projectx ServerName projectx ServerAlias projectx </VirtualHost> Sure enough when I go to a browser and type in http://projectx/ it takes me to the correct subfolder. Everything works!!! Not so fast. I then go to http://endymion/ and instead of taking me to /var/www/ it takes me to /var/www/projectx/ Clearly I'm missing something. Help please! ;)

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  • What other ways can I load balance EC2 servers without using Elastic Load Balancing?

    - by undefined
    I have a web application that consists of a web server managed by a web hosting firm, a set of EC2 instances in amazons cloud and a MySQL database (hosted on the webserver). MySQL is behind a firewall and is set to allow access from Localhost and from a single IP address which is an Amazon Elastic IP address that is attached to the EC2 instance I have been running up to now. The problem is that I want to look at my scaling up and load balancing strategy for my EC2 instance. To this end I have been investigating the Elastic Load Balancers and Autoscaling tools that Amazon provides and have managed to set this up fine but for one thing - connecting to the MySQL database running on my webserver. I realised (thanks to answers on Serverfault) that I needed to check firewall settings and add the IP address for the load balancer, however Elastic Load Balancers provide you with a DNS name, not an IP address and infact the IP addresses change over time so this will not work. I have been told by the company hosting the database that the way the firewall works is to look up the IP address of the DNS name and store the IP rather than the DNS name. so basically this will not work and the only way to allow access would be to open up the SQL port to allow access from anyone! Is this a viable idea? Should I look at moving my database into the cloud? Is there another firewall that the server company can use? Should I find another way of load balancing (if so what?) tricky one eh? any help appreciated!

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  • Suggestions for transitioning to new GW/private network

    - by Quinten
    I am replacing a private T1 link with a new firewall device with an ipsec tunnel for a branch office. I am trying to figure out the right way to transition folks at the new site over to the new connection, so that they default to using the much faster tunnel. Existing network: 192.168.254.0/24, gw 192.168.254.253 (Cisco router plugged in to private t1) Test network I have been using with ipsec tunnel: 192.168.1.0/24, gw 192.168.1.1 (pfsense fw plugged in to public internet), also plugged in to same switch as the old network. There are probably ~20-30 network devices in the existing subnet, about 5 with static IPs. The remote endpoint is already the firewall--I can't set up redundant links to the existing subnet. In other words, as soon as I change the tunnel configuration to point to 192.168.254.0/24, all devices in the existing subnet will stop working because they point to the wrong gateway. I'd like some ability to do this slowly--such that I can move over a few clients and verify the stability of the new link before moving critical services or less tolerant users over. What's the right way to do this? Change the netmask on all of the devices to /16, and update gateway to point to the new device? Could this cause any problems? Also, how should I handle DNS? The pfsense box is not aware of my Active Directory environment. But if I change DNS to use the local servers, it will result in a huge slowdown as DNS queries will still be routed over the private t1. I need some help coming up with a plan that's not too disruptive but will really let me thoroughly test the stability of the IPSEC tunnel before I make the final switch. The AD version is 2008R2, as are the servers. Workstations are mostly Windows XP SP3. I have not configured the 192.168.1.0/24 as a site in AD sites and services.

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  • Why did I loose access to the mailboxes on my old web/mail host after changing to a new one but keeping old MX values

    - by LaserBeak
    So I changed the NS records with registrar to point at the new webhosts DNS servers and edited the SOA record there, deleting the new hosts default MX records and instead putting in the old ones for the old web\mail hosts. The website A record is however pointing at the new webhosts servers and the site comes up fine. But none of this should cause me to loose access to mailboxes on my old hosts mail server right? I log into the control panel on the old host, all the mailboxes are there, all the passwords are fine but I can't log in using either webmail or pop3, says incorrect log-in/password. I even created a new mailbox and password for it respectively, but it would not let me log in. For what its worth I did not change\delete the records for 'A' on the old webhost zone file, since I am not hosting the site with them anymore and NS records are pointing to other hosts DNS servers/zone file so that shouldn't matter right? The old hosts mailserver is also not simply down, I can tell because through the control panel I setup a mail forward for one of the existing inboxes and when sending mail to it, it receives it and forwards it fine. So from this I can deduce that I have correctly inputted the old hosts MX records into the zone file hosted on the new hosts DNS and the mail is being sent to the old hosts mail server(s) and is successfully forwarded by it. But why can't I log into those account/inboxes anymore ?

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  • Recursive reset file permissions on Windows

    - by Peter Horvath
    There is a big, complex directory structure on a relative big NTFS partition. Somebody managed to put very bad security privileges onto it - there are directories with randomly given/denied permissions, etc. I already run into permission bugs multiple times, and I found insecure permission settings multiple times (for example, write permissions for "Everyone", or false owners). I don't have time to check everything by hand (it is big). But luckily, my wishes are very simple. The most common: read/write/execute on anything for me, and maybe read for Everyone. Is it possible to somehow remove all security data from a directory and giving my (simple) wishes to overwrite everything there? On Unix, I used a chown -R ..., chmod -R ... command sequence. What is its equivalent on Windows?

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  • In Windows, a batch file with a recursive for loop and a file name including blanks

    - by uvts_cvs
    Hello, I have a folder tree, like this (it's only an example, it will be deeper in my real case): C:\test | +---folder1 | foo bar.txt | foobar.txt | +---folder2 | foo bar.txt | foobar.txt | \---folder3 foo bar.txt foobar.txt My files have one or more spaces in the name and I need to perform a command on them, so I am interested in foo bar.txt but not in foobar.txt. I tried (inside a batch file): for /r test %%f in (foo bar.txt) do if exist %%f echo %%f where the command is the simple echo. It does not work because the space is skipped and I get no output. This works but it is not what I need: for /r test %%f in (foobar.txt) do if exist %%f echo %%f It prints: C:\test\folder1\foobar.txt C:\test\folder2\foobar.txt C:\test\folder3\foobar.txt I tried using the quotation mark (") but it does not work: for /r test %%f in ("foo bar.txt") do if exist %%f echo %%f It does not work because the quotation mark is still included in the output: C:\test\folder1\"foo bar.txt" C:\test\folder2\"foo bar.txt" C:\test\folder3\"foo bar.txt"

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  • Recursive Batch File

    - by MCZ
    I have a file that looks this: head1,head2,head3,head4,head5,head6 a11,a12,keyA,a14,a15,a16 a21,a22,keyB,a24,a25 a31,a32,keyC,a34 a41,a42,keyB,a44,a44 a51,a52,keyA,a54,a55,a56 a61,a62,keyA,a64,a65,a66 a71,a72,keyC,a74 some message Objective: Write list of unique keys to a text file. For example, the result for the file described above should be: keyA, keyB, keyC Here's the pseudocode I would like to implement in batch file recur.bat Read second line of inputfile If no key exist on second line, return else continue Append keyX to list FINDSTR /v keyX inputfile Pipe results to recur.bat I don't know if this is the most efficient way to do this without using actual programming language. Any suggestions for actual batch file code?

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  • Delete recursive directorys with FTP command on Bash

    - by Fake4d
    I have a problem with my infrastructure here. I am in a closed DMZ and have to access a FTP-Server in another DMZ from a headless Suse Linux 10.1. So i think i only got the ftp command.. But i have to delete a directory with about 100 subdirectorys and endless files in it.. When I type del directory it returns "Its not empty" and so i have to delete each sub directory and file manually. Oh please tell me a way how i can do this automatically :)

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  • Recursive Unrar with Deletion as it progresses

    - by Jharwood
    Basically, i have a set of directories that are constantly being filled with .rar's, and i need to be able to extract them in place with automatic deletion of the left over .(rar|rXX) files. How would i go about this? Note: I can't delete all of them once done, they have to be deleted as the script completes one rar set. Example Directory Structure: / /folder1/ /file1.rar /file1.r00 /file1.r01 /folder2/ /sub.folder1/ /file2.part001.rar (contains a directory "file2") /file2.part002.rar /file2.part003.rar /sub.folder2/ /file3.rar /file3.r00 /file3.r01 Expected Result: / /folder1/ /file1.ext /folder2/ /sub.folder1/ /file2/ /file2.ext /sub.folder2/ /file3.ext

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  • Recursive rm with condition in Linux

    - by zengr
    I have the following folder structure: parent - folder1 - main1.x - main1.y - main1.z - main1-626262.x - main1-626263.x - main1-626264.x - main1-626265.x - main1-626266.x - main1-626267.x - folder2 - main2.x - main2.y - main2.z - main2-726262.x - main2-726263.x - main2-726264.x - main2-726265.x - main2-726266.x - main2-726267.x Now, I want to remove: main-*********.x So, my required folder structure: parent - folder1 - main1.x - main1.y - main1.z - folder2 - main2.x - main2.y - main2.z So, how can I achieve this?

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  • Recursive rm with condition in Linux

    - by zengr
    I have the following folder structure: parent - folder1 - main1.x - main1.y - main1.z - main1-626262.x - main1-626263.x - main1-626264.x - main1-626265.x - main1-626266.x - main1-626267.x - folder2 - main2.x - main2.y - main2.z - main2-726262.x - main2-726263.x - main2-726264.x - main2-726265.x - main2-726266.x - main2-726267.x Now, I want to remove: main-*********.x So, my required folder structure: parent - folder1 - main1.x - main1.y - main1.z - folder2 - main2.x - main2.y - main2.z So, how can I achieve this?

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  • Seeing double-cursor in 'recursive RDP'

    - by John
    I'm using a Virtual PC VM on my PC to connect to a remote PC using RDP over a VPN. It works just fine except that in the RDP session, I often see a double mouse cursor... I get a standard mouse-arrow and the context-specific cursor such as a caret or hourglass. It's not a big problem but rather annoying and I wondered if there's any way to fix it, or at least understand where it comes from? Is it because I'm effectively running one RDP session from inside another? My host PC runs W7, my local VM runs XP, and the remote PC access using RDP is W7. Thankyou for any help.

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  • binary search tree recursive subtree in java

    - by Art Peterson
    Can anyone point me to a code example (java preferably) or psuedocode that uses recursion to return a subtree that contains all nodes with keys between fromKey and toKey. So if I was to call Tree.subtree(5,10) it should return all nodes in the BST that have keys between 5 and 10 inclusive - but I can't use loops or helper methods...only recursive calls to the subtree method, which takes fromKey and toKey as parameters. Thanks!

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  • Stack Overflow problem in a recursive program in C

    - by Adi
    Hi all, I am getting a stack overflow in one of the recursive functions i am running.. Here is the code.. void* buddyMalloc(int req_size) { // Do something here return buddy_findout(original_index,req_size); // This is the recursive call } void *buddy_findout(int current_index,int req_size) { char *selected = NULL; if(front!=NULL) { if(current_index==original_index) { // Do something here return selected; } else { // Do Something here return buddy_findout(current_index+1,req_size); } } else { return buddy_findout(current_index-1,req_size); } } Consider the initial value of index to be 4. and it first do index-1 till it reaches 0 index. and then it comes back to index 4 by incrementing..This is wht i want to implement. But it gives a stack overflow with memory map in the command prompt : Here is the output from my shell : * glibc detected * ./473_mem: free(): invalid pointer: 0x00c274c0 * ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6[0xb50ff1] /lib/tls/i686/cmov/libc.so.6[0xb526f2] /lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xb557cd] ./473_mem[0x8048b44] ./473_mem[0x8048b74] ./473_mem[0x8048b74] ./473_mem[0x8048944] ./473_mem[0x8048c87] ./473_mem[0x8048d31] ./473_mem[0x8048f79] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xafcb56] ./473_mem[0x8048671] ======= Memory map: ======== 0017c000-00198000 r-xp 00000000 08:01 5224 /lib/libgcc_s.so.1 00198000-00199000 r--p 0001b000 08:01 5224 /lib/libgcc_s.so.1 00199000-0019a000 rw-p 0001c000 08:01 5224 /lib/libgcc_s.so.1 00260000-00284000 r-xp 00000000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 00284000-00285000 r--p 00023000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 00285000-00286000 rw-p 00024000 08:01 1927 /lib/tls/i686/cmov/libm-2.10.1.so 006cd000-006e8000 r-xp 00000000 08:01 6662 /lib/ld-2.10.1.so 006e8000-006e9000 r--p 0001a000 08:01 6662 /lib/ld-2.10.1.so 006e9000-006ea000 rw-p 0001b000 08:01 6662 /lib/ld-2.10.1.so 00aa9000-00aaa000 r-xp 00000000 00:00 0 [vdso] 00ae6000-00c24000 r-xp 00000000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c24000-00c25000 ---p 0013e000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c25000-00c27000 r--p 0013e000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c27000-00c28000 rw-p 00140000 08:01 1900 /lib/tls/i686/cmov/libc-2.10.1.so 00c28000-00c2b000 rw-p 00000000 00:00 0 08048000-0804a000 r-xp 00000000 00:14 2176 /media/windows-share/OS/Project2/473_mem 0804a000-0804b000 r--p 00001000 00:14 2176 /media/windows-share/OS/Project2/473_mem 0804b000-0804c000 rw-p 00002000 00:14 2176 /media/windows-share/OS/Project2/473_mem 08483000-084a4000 rw-p 00000000 00:00 0 [heap] b7600000-b7621000 rw-p 00000000 00:00 0 b7621000-b7700000 ---p 00000000 00:00 0 b7716000-b7819000 rw-p 00000000 00:00 0 b7827000-b782a000 rw-p 00000000 00:00 0 bfb96000-bfbab000 rw-p 00000000 00:00 0 [stack] Aborted Thanks in advance adi

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  • Time complexity of a recursive algorithm

    - by Passonate Learner
    How can I calculate the time complexity of a recursive algorithm? pow1(x,n) if(n==0){ return 1 } else{ return x * pow1(x, n-1) } pow2(x,n) if(n==0){ return 1 } else if(n is odd integer){ p = pow2(x, (n-1)/2) return x * p * p } else if(n is even integer){ p = pow2(x, n/2) return p * p }

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  • decompiling a DNS packet

    - by rgksugan
    I am trying to catch DNS packets which are sent from my system using Jpcap API. I have got an dns packet. I want to retrieve the ip address for which the DNS lookup is made. How can i get that?

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  • nslookup for C# and C++ to resolve a host using a specific Server

    - by Shahmir Javaid
    i need to resolve a hostname using a specific DNS server like you would in nslookup C:\>nslookup hotname 192.100.10.10 Server: UnKnown Address: 192.100.10.10 Name: hostname.host Address: 192.100.10.14 But ofcourse in return i dont just want the address i want all the values for Server, Address, Name and Address I have looked at the System.Net.Dns Class but that only gives me the Resolved IP Address and dosent let me select the DNS Server of my choosing If any one has done this before and you can help me with this. it would be great :D Thanks in Advanced

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