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• Windows Server 2008: Limit UDP/TCP packets per IP or ban

  - by WBAR

  How I can limit UDP/TCP packets per IP send to my host (or better PORT) per second or minute ? Would be nice to ban that IP for 12/24 hours or even for ever. I got Windows Server 2008 and I'm very poor in Windows administration but quite good in Linux. EDIT: By basic problem is that They sending a lot of rubbish UPD and TCP packets.. TCP packets without SYNCH, fragmented UDP packets so my servers stop responding.. So I need to cut off users (IPs) sending more than X packets per second. I need solution witch provides me, somehow, configurable: X packets of certain type (UDP, TCP or both - lets say parameter named Z ) are allowed to be received by IP on Y port, otherwise this packet should be DROPPED. My virtual hosts are hosted by VirtualBox and I'm able to forward all incoming packets certain type and certain port to the specific Virtual Host, but I need to DROP them before my VirtualBox receive them.

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• What are the IPv6 Public and Private and Reserved ranges

  - by vipin raj

  I just want to know what are all the public IPv6 ranges which ISPs or other users can use? Also need a list of addresses which can be used in private networks and also the list of addresses which never can be used in any network. I have been searching through different web sites. But none gives a reliable answer. Actually we are developing an application which allows user to plan their IP address(create supernets, subnets, hosts, assign host to ports etc). So my application should be able to distinguish between all kinds of address ranges, whether it is reserved, public, private, multicast etc

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• publish over ssh jenkins

  - by Pravish

  I have been working on a small project where need to copy files from one windows machine to another through jenkins in a secure way. I have heard about publish over ssh plugin in Jenkins. I tried to set that up but no luck. Did anybody do that and help me in that? Even to resolve it, i had installed openssh with cygwin on both the windows server and tried to copy the files (through SCP) or just connect both hosts (through ssh) in linux way through cygwin but always gets error of - ssh 3612 tty_list::allocate_tty: No tty allocated or scp 2680 tty_list::allocate_tty: No tty allocated Please help!

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• Update a war on Tomcat start up

  - by pater

  I want to setup an update process for an application running on Tomcat. The server which hosts tomcat is only open during working hours (it is an intraner application for a small company). I was thinking that I could upload the new war to the server and set up "something" to run on the next server boot. This something could be a bat file that will be executed on server start up but before the start up of the Tomcat service and it will delete the old war and its exploded folder. When I update manually the war I also delete the work folder of Tomcat (just to be sure). I know about hot deployment but I do not consider it an option since I am not very sure for the implications it might have on the users current working sessions. Is there a way to run such a bat file before Tomcat start up or an alternative way to do this update? Tomcat version isn't an issue. Now is running Tomcat 6 but I can upgrade to version 7 if needed.

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• Proxying fake domain to a localhost port

  - by Trevor Burnham

  I'd like to do much the same thing described at Redirect Domain Name to Localhost for web app development purposes, but with the twist that I'd like requests to fakedomain.com:80 to be routed to localhost:8080, say, so that I don't have to actually use my development machine's port 80. I'd welcome answers that take the form of: Small changes to configuration files like /etc/hosts, and/or An easy-to-configure proxy server I could run Note: Pow takes the approach of setting a firewall rule to forward all incoming traffic on port 80 to port 20559. That may be an acceptable solution, but ideally, I'd like to forward only a specific domain + port combination.

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• How to use public-key ssh authentication

  - by Poma

  I have 2 ubuntu 12.04 (beta) servers (node1 and node2) and want to establish passwordless root access between them. Other users should not have access to other boxes. Also note that ssh default port is changed to 220. Here's what I did: sudo -i cd /root/.ssh ssh-keygen -t rsa # with default name and empty password cat id_rsa.pub > authorized_keys then copied id_rsa & id_rsa.pub to node2 and added id_rsa.pub to authorized_keys. Both hosts have the same /root/.ssh/config file: Host node1 Hostname 1.2.3.4 Port 220 IdentityFile /root/.ssh/id_rsa Host node2 Hostname 5.6.7.8 Port 220 IdentityFile /root/.ssh/id_rsa Now the problem is that when I type ssh node2 it asks me for password. What may be the problem?

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• XAMPP localhost and 127.0.0.1 don't work but computer name does work

  - by Steven

  I am running on a vista. Localhost and 127.0.0.1 do not work anymore but my computer name still works. Localhost and 127.0.0.1 only show a blank page however using my computer name can access xampp homepage as well as my server files. I am assuming there is something wrong with my hosts file but when i checked it looks fine: 127.0.0.1 localhost is the only thing in there that is not commented out, which seems right according to what I've seen on the web so far. I had a trojan recently that I got rid of so I believe that definitely has something to do with it. It was msa.exe among potentially others but I think I got rid of it with Malwarebytes. This is the only issue that is left. Thanks!

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• Save a single web page (with background images) with Wget

  - by mikael

  I want to use Wget to save single web pages (not recursively, not whole sites) for reference. Much like Firefox's "Web Page, complete". My first problem is: I can't get Wget to save background images specified in the CSS. Even if it did save the background image files I don't think --convert-links would convert the background-image URLs in the CSS file to point to the locally saved background images. Firefox has the same problem. My second problem is: If there are images on the page I want to save that are hosted on another server (like ads) these wont be included. --span-hosts doesn't seem to solve that problem with the line below. I'm using: wget --no-parent --timestamping --convert-links --page-requisites --no-directories --no-host-directories -erobots=off http://domain.tld/webpage.html

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• mysql single database relocation

  - by asdmin

  I would like to know if it's possible to operate different databases on different filesystem locations. Background: we are a hosting service, which hosts mysql, web, and smtp to it's customer, but all our services (sql, smtp, http) are located in a different place. We are going to assign a single logical volume to a customer, which will accommodate the customer's mailing, weppages and (hopefully) sql database. Web pages and mailing are already covered, but I am not able to find a configuration setting which would enable me to specify the location of a database (the directory where mysql stores the DB). Let me please highlight, the target here is to relocate different databases to different locations in the filesystem, not moving them from a single place to an another (single) place. Also please do not bother answering with soft and hard symbolic links. ;) Thanks

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• CentOS 5 - Unable to resolve addresses for NFS mounts during boot

  - by sagi

  I have a few servers running CentOS 5.3, and am trying to get 2 NFS mount-points to mount automatically on boot. I added 2 lines similar to the following to fstab: server1:/path1 /path1 nfs soft 0 0 server2:/path2 /path2 nfs soft 0 0 When I run 'mount -a' manually, the mount points are properly mounted as expected. However, when I reboot the machine, only /path2 is mounted. For /path1 I get the following error: mount: can't get address for server1 It obviously looks like a DNS issue, but the record is properly configured in all the DNS servers and is mounted properly if I re-try the mount after the reboot is completed. I could properly fix this by using IP address instead of hostnames in /etc/fstab or adding server1 to /etc/hosts but I would rather not do that. What might be the reason for failing to resolve this specific address during boot time? Why the problem is only with the 1st mount point and the 2nd is properly mounted despite having identical configuration?

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• DNS Replication issue

  - by BillN

  We host the DNS for our domain. Two weeks ago, the developer requested that we setup a new zone 'dev.ourdomain.com' and place two host records in it my.dev.ourdomain.com and admin.dev.ourdomain.com. We added the zone to our DNS and added A records for the host. Now a week later, some DNS servers like google (8.8.8.8) and gtei (4.2.2.2) will resolve the hosts, but others like OpenDNS (208.67.222.222 ) and ATT Uverse (68.94.156.1) cannot resolve it. Any Ideas?

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• How can I run a Virtual Machine in Windows 8 Developer Preview?

  - by Marc Gravell

  Since having issues installing Ubuntu side-by-side with Windows 8, I thought I'd try running Ubuntu in a VM instead. However, VMWare player has no love for Windows 8 yet (invalid VM86 or something similar), and AFAIK the promised hypervisor options are not currently available for playing with. So: Are there any VM hosts that do work in Windows 8 Developer Preview at this point? (specifically for running Ubuntu) Alternatively, does Wubi work on Windows 8? It seems not; from Wubi: An error occurred: 'WindowsBackend' object has no attribute 'iso_path'

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• Apache Subversion and Sudo - Why can't I resolve this hostname?

  - by Hollowsteps

  Okay, I made a mistake and I'll be the first to admit I'm new at this setup. I built a bare bones kit, installed Ubuntu on it, and attempted to set up a source control server for a project some friend and I were going to work on. Unfortunately, I screwed up. I followed a dodgy tutorial from 2005 and when it didn't work, started mixing and matching trying to get to the source of my problem. So now I sit before you, a broken and miserable man. Desperate to escape this annoying echo of 'Unable to resolve host computer.repositoryname.com', I uninstalled apache and subversion. That did not fix it. Next I tried to edit my /etc/hosts, going so far as to remove the reference to '127.0.1.1 computername'. Still I'm plagued. I know I messed up, is there any way to track down this wayward bug?

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• How do I associate server traffic to a domain hosted on that server?

  - by morley

  I have three or four Linux servers, each of which hosts anywhere from 5 to 50 domains. Each domain has its own folder: /www/projectname/web/ Logs go in: /www/projectname/log However, if there's a traffic spike (or, as I see it on my end, a memory usage spike), I'm not sure how to figure out which domain is responsible for the traffic without running tail -f on each of the projects and making an educated guess based on how fast things scroll. There's got to be a better way! There probably is, but I haven't seen it. And the last time I checked, bandwidth monitors only report system-wide load. So if anyone knows how to do this the right way, please let me know. Thanks!

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• How do I set up a one way trust when some DCs are firewalled off from each other?

  - by makerofthings7

  I have two Windows 2008 forests in Win2003 mode and I need to set up a one way trust between them. The validation button in Domains And Trusts works in one forest but not in the other. I think this is because not all DCs can see all the other DCs. I'm not sure if I need to set up the hosts file, so I did so with company.com in the respective domain along with the relevant DC. (do I need _msdcs _tcp zones etc) How do I set up a one way trust when some DCs are firewalled off from each other?

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• Is there a software package that safely allows SSH via web on simple web host?

  - by spoulson

  I want to be able to use a secured web page on my shared web host to make SSH connections out to any destination. A shared web host is cheap and easy to maintain, and usually allows ssh to the web server. There are times I'd like to ssh into my web server, but don't have direct ssh connectivity. I'm aware of consoleFISH, Ajaxterm, and Anyterm. The problem is consoleFISH is a man-in-the-middle by design, and Ajaxterm/Anyterm require running a daemon process on the hosting server. Web hosts can usually support cron jobs, but not continuously running daemon processes. Additional Apache modules are usually out, too, as they require reconfiguration of the server and affects all other customers. Are there any software packages out there I can run on my shared web hosting account that provide a true ssh experience with these limitations?

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• Find computer names on a private network (with nmap?)

  - by paracaudex

  On a LAN, I want to find out the names of all the connected computers using a cross-platform program, preferably nmap. I know I can do nmap -sn xxx.xxx.xxx.xxx/24 (where xxx.xxx.xxx.xxx is a local IP address) to find hosts which are up, but how do I find the computers' hostnames? Do they broadcast this in a way that I can find using nmap? UPDATE: It looks like Angry IP Scanner can do this. How does it do this? Can I replicate it with nmap?

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• once VPNed into pfSense, unable to hit the public URLs of my websites - they are routed to the pfSense box

  - by Sean

  I have a pfSense box setup as the firewall/router/VPN appliance at my colo. Once I VPN into the colo (either pptp or openvpn, pptp preferred due to multiple clients and ease of configuration), I am able to hit all my servers by their private 10.10.10.x ip and am able to browse the public internet without issue. When I try and hit the URL of a domain hosted by one of my servers, I am prompted for credentials. If I login using the pfSense credentials, I'm connected to pfSense as if I'd used it's internal IP. If I hack my hosts file to point url - server private IP it works fine, but this is obviously not a good solution. To recap: not connected to VPN - www.myurl.com works connected to VPN - www.myurl.com never makes it to the correct server, but is sent only to the pfSense box I'm sure it's something small that I've missed in the pfSense config.

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• Blocking non-virtual host access in Apache?

  - by cmbrnt

  I'm running an apache-server, with a bunch of virtual hosts for about seven domain names. Now I'd like to disallow access for clients who try to access my server using only its IP-adress. So: When someone accesses my website through www.domain.com, they reach the site hosted in /var/www/domain.com/public_html/. When someone enters the ip-address of the server they reach a 403 Forbidden-message. The problem with this is that they are theoretically able to reach my other sites through bruteforce, when getting http://11.22.33.44/domain.com/public_html/. I rather want them to reach a 403 Forbidden all the time, as long as they don't access my server by a valid domain name. How do I solve this problem?

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• Cannot connect to telnet server

  - by BloodPhilia

  So, I can't use telnet to connect to any server but it works fine from a different computer. It just says it can't connect. I tried the following things: Disable firewall and AV protection. (Basically, there was no security feature left online) Telnet is set to "Trusted" in my AV protection. (Kaspersky Internet Security 2011) Using Putty to telnet, but apparently Putty's connection is also inhibited. (Says it can't connect to host) Disabling the telnet client in Control Panel and then re-enabling it. (Windows 7 Ultimate) hosts file is clean. Checked for nasties using MBAM and KIS 2011 as well as going though my HijackThis logs, nothing found. I can connect to the same machines/servers through the web browser, ping, tracert, etc. Only telnet seems to be blocked. Any other thoughts?

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• Wamp virtualhost with supporting of remote access

  - by Farid

  To cut the long story short, I've setup a Wamp server with local virtual host for domain like sample.dev, now I've bind my static IP and port 80 to my Apache and asked the client to make some changes in his hosts file and add x.x.x.x sample.dev , I've also configured my httpd virtual host like this : <VirtualHost *:80> ServerAlias sample.dev DocumentRoot 'webroot_directory' </VirtualHost> Client can reach to my web server using the direct access by ip address, but when he tries using the sample domain looks like he gets in to some infinite loop. The firewall is off too. What would be the problem?! Thanks.

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• Should I limit end-user gigabit ports to avoid saturating uplink/trunk connections?

  - by Joel Coel

  We have a campus with 16 buildings and older 850nm 1Gbps fiber links between the buildings, that all come to a core switch for our servers that also uses 1Gbps ports. We're finally starting to replace our aging 10/100 end-user switches, and much of what we're looking at are 1 Gbps units. My question is, since the trunk/uplink lines are still 1Gbps, if I were to install 1 Gbps switches for end users, should I limit the ports to 100Mbps until I can also upgrade the trunks to avoid allowing a bad-behaving host to saturate a trunk line (since we're a college, we have plenty of mis-behaving hosts) and thereby create a DoS situation for a building, or will TCP congestion control typically take care of that for me? What if we have a lot of UDP traffic (games, video chats, even a small amount of bittorrent)?

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• How do you manage updates without a staging environment: CentOS 6.3

  - by Gregg Leventhal

  I am managing about 20 servers, many of them virtual. They are almost all different purpose, and none are clustered. I have a distributed LAMP stack, a few application servers, some build servers, a few KVM hosts. They are CentOS 6.3 mostly with a few Ubuntu (unfortunately). I don't have the resources to setup a staging environment where I can have duplicates of my machines and test updates before rolling them out. I am taking file backups. What I want to know is how you are approaching backing up your Linux systems. I assume you don't just do yum update, but then how are you choosing the packages worthy of updating? When (if ever) are you updating the kernel, etc.. How do you test updates without a staging environment? Snapshot and hope for the best?

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• archive all messages account on exchange 2003 receiving multiple copies

  - by aeolist

  Hello everyone I am using microsoft exchange 2003 on windows 2003 small business server. For the past month or so, the archiver account has been receiving multiple copies (about 15 or so) of each and every email. edit: All copies share the same Message ID. The machine that hosts exchange is updated religiously and an antivirus scan is run on a daily basis. So would anyone please have any ideas about how to deal with this and furthermore, how i would be able to delete the multiple copies of emails from outlook 2003 inbox. I will edit the entry, answering any questions or updating on my efforts Thanks in advance

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• Uninstall SQL Server 2005 Express after Demoting the DC

  - by Walter Aman

  A Windows Server 2003 SP2 hosting a now orphan installation of SQL 2005 Workgroup was pressed into service as a DC in a disaster recovery scenario. It has since been demoted. The server also hosts legacy apps for which we lack reinstallation resources; thus our desire to preserve it as close to intact as possible while removing the orphaned roles. All efforts to remove SQL 2005 thru Control Panel and ARPWrapper /remove fail with error 29528. Should I abandon this and leave the orphan SQL dormant, or is it reasonable to remove it post-demote?

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