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• Is it ok to nofollow all outbound links? [duplicate]

  - by Noam

  This question already has an answer here: Could globally applying rel=“nofollow” to external links have a negative SEO impact 1 answer I'm currently adding a nofollow to almost all of my outbound links thinking this will keep the PR inside my domain. Is this a bad approach?

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• How to forward traffic using iptables rules?

  - by ProbablePattern

  I am new to iptables and I have been doing Google searches for a few days now without finding a good solution to this problem. I have computer A with a public ip address (say 192.0.2.1) that can access the Internet unrestricted. I have another computer B with a private ip address (192.168.1.1) that can only access computer A. How do I use iptables to forward network traffic from B through A to the Internet? I need to use http, ftp, and https in order to use apt-get with sudo. Both computers run Ubuntu linux. I have tried using Squid but I think it is far too complicated for what I need to do.

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• A record not resolving

  - by user1561108

  I have a hosted domain at siteground. On this domain & host I have a subdomain with a wordpress install. I wish to move this blog to another host (hostgator), while keeping the domain with siteground. To do this I created a hosting account at hostgator, got it's ip address and set the A record in siteground's cpanel accordingly: subdomain.example.com 14400 A (ip of hostgator account) Going by this online traceroute tool the records appear to have been updated (over 4 hours ago now) as it now resolves to a theplanet.com server location which hostgator use yet the subdomain is still not resolving from a web browser. The account at hostgator has been setup and is navigable via ip address/~accountname. What's going wrong here? I should add the relevant DNS record at hostgator side looks like this: subdomain.example.com 86400 IN SOA ns483.websitewelcome.com. subdomain.example.com 86400 IN NS ns1.siteground145.com. subdomain.example.com 86400 IN NS ns2.siteground145.com. subdomain.example.com 14400 IN A 74.54.176.3 I'm not sure if the hostgator record should be classed as the SOA record but I don't know enough about it to be sure. Is this the source of the problem?

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• cannot using internet in VMWare

  - by user66247

  I am using VMware Workstation version 7 on Ubuntu 10.10. I installed Windows XP service pack 3 for guest os. Within VMWare, I am using bridge connection that I assigned static IP address to be able to ping host IP address but I cannot ping default router gateway. I also tried to command "/etc/init.d/vmware start" on terminal. All tasks are able to start successfully except "VM communication interface socket family" I am not sure that how to setup network for my VMWare by using wireless. Thanks in advance.

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• Cant connect to home server

  - by user52141

  Trying to figure out what I might be doing wrong. I installed XAMPP - and everything looks fine. If I go to localhost everything comes right up. But when I go to my IP address, I just get a message that the browser could not connect to it. I go into my router and set up port forwarding for port 80 etc, and I even tried putting the server as a DMZ - still nothing. I turned the firewall off to see if that was interfering in some way, then uninstalled it completely for good measure, made no difference. I'm out of ideas.. oh, and yes I have a static IP address.

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• ASUS WL-500gP v2 network between two local machines

  - by Epsiloncool

  I have two windows XP machines in my home networks, connected with ASUS WL-500gp V2 which also used as internet router. Problem is: while I have both computers normally goes to internet (used DHCP, static routes is ON, routing table is empty, operation mode is Home Gateway). I see both computers listed on the Network Neighborhood on 1st computer (wired to router), can enter to my own computer, but can not enter to other. I see only one computer (2nd) on the Network Neighborhood on 2nd computer (connected thru Wi-Fi), can enter to itself, getting error when trying to enter 1st computer address in address line (like \My1stComp). What is the problem? I totally crazy founding problem about 3 months.

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• Changed domain A records for new static ip, but no mail

  - by Tim the Enchanter

  We have recently changed our ISP, I have changed the mail and mailserver DNS A records for our domain name to point to the new external static IP address assigned to the router by the new ISP (the MX record points to mail.<mydomain> as always) but I am not getting any email (though sending email works). Do I just have to wait will the change propagates? I am slightly concerned because I can connect to the web email service made visible through the new router which suggests that the mail.<mydomain> static I.P. address change has happened. Have I missed something?

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• is using Hosts for resolving a sql-server more performant?

  - by Ice

  Hi, we have a legacy application which uses a access.mdb with hundreds of ODBC-connected tables on a sql-server. the access.mdb contains nothing else than these odbc-connections. Now we consider to use a virtual sql-servername for these odbc connections and resolve it in the local hosts-file with the ip-address of the real sql-server. Like this we can easy switch between a test-sql-database server and the the server for production in changing one single entry in the hosts. EVERYTHING works fine and now comes the question: Could it be that this is more performant because there is one single point on resolving the sql-server (name or ip-address)? Is there something like a network-cache / DNS-Cache? peace Ice

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• [Outlook 2007] How to recover the deleted Tasks from a Deleted Profile?

  - by JoshuaD

  Edit: OK. I've found the OST with the tasks in it, but I am unable to import an OST into outlook, it appears it needs to be converted to PST first. Is there anyone who knows a free OST - PST converter or some way to import OSTs directly into outlook? I am using outlook 2007 linked to an MSN email account through outlook connector. I recently added [email protected] (Fake address) to my outlook and deleted [email protected]. I thought my tasks were locally stored seperately from the email address, but it turns out when I deleted [email protected], I also lost all of my tasks. This is catastrophic. Is there any way to recover them? They're not stored on the MSN web account. I figure they must still be somewhere on my computer. I just don't know where to look or how to look there. Thank you.

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• Fundamentals of Vendor Management

  Creating and maintaining mutually beneficial relationships with external vendors is one of the pillars of good project management. Dwain Camps goes through what to expect and allow in your client-vendor relationship during the various stages of a given project to ensure its success and secure that all important win-win outcome. Save 45% on our top SQL Server database administration tools. Together they make up the SQL DBA Bundle, which supports your core tasks and helps your day run smoothly. Download a free trial now.

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• How to enable a Web portal-based enterprise platform on different domains and hosts without customization

  - by S.Jalali

  I work at Coscend, a cloud and communications software product company. We have built a Web portal-based collaboration platform that we would like to host on five different Windows- and Linux-based servers in different hosting environments that run Web servers. Each of these Windows and Linux servers have a different host name and domain name (and IP address). Out team would appreciate your guidance on: (1) Is there a way to implement this Web portal-based platform on these Linux servers without customizing the host name, domain name and IP address for each individual instance? (2) Is there a way to create some variables using JavaScript for host name and domain name and call them from the different implementations? (3) Can these JavaScript modules be made portable and re-usable object modules for different environments and instances? The portal is written in JavaScript that is embedded in HTML5 and padded with CSS3. Other technologies include Flash, Flex. Databases used are PostgreSQL and MySQL.

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• Tips for locating my stolen computer

  - by user379468

  I'm in a bit of a panic, my new Powerbook laptop was stolen. I had no mobile me, or security software installed on the computer. I have the mac address of the computer as well as the serial number. Is there a hacky way to do this? I was even thinking perhaps of trying to use bluetooth, I know I had it set to discoverable. and I know the "name" of the computer, perhaps there is app that can scan the names of bluetooh computers in the vicinity? If there some third party you can get to scan the internet for your mac address? Any glimmer of hope would really help

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• forward same port but for two different IPs (cisco)

  - by Colin

  Hi! I have a cisco running IOS 12.0(25) responding to two different IPs addresses: IP_A and IP_B. Behind this router I also have two different servers: server_A and server_B. What I want is to forward port 22 to both servers, so: IP_A, port22 -> server_A, port22 IP_B, port22 -> server_B, port22 ATM this only works for one of them (server_A), this is my config: interface Ethernet0/0 description Internet ip address IP_A 255.255.255.0 ip address IP_B 255.255.255.0 secondary no ip directed-broadcast ip nat outside no ip mroute-cache no cdp enable ip nat pool pool_A IP_A IP_A netmask 255.255.255.0 ip nat pool pool_B IP_B IP_B netmask 255.255.255.0 ip nat inside source list A pool pool_A overload ip nat inside source list B pool pool_B overload ip nat inside source static tcp server_B 22 IP_B 22 extendable ip nat inside source static tcp server_A 22 IP_A 22 extendable access-list A permit server_A access-list B permit server_B

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• Mirrored servers in data centers nationwide -- how?

  - by Sysadmin Evstar

  Mirrored servers in data centers nationwide -- how? I flunked my IT interview by getting this question wrong. I thought that in the various metropolitan areas, an "http://google.com" request goes to the ISP's DNS server, which somehow returns an IP address for one of several geographically-nearby http servers, and then something internally rolls over to the next available local Google server. But then, I could not explain where the table of available local Google servers is actually cached, or the details of the IP address rollover. Or how they could manually take some server out of the rotation, from anywhere. So, what should I be reading now so I can ace this question next time? Also, what daemons run on these machines 24/7 to keep all those mirrored database disks synchronized?

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• Saving files with libgdx

  - by Rudy_TM

  Writing my game in libgdx, i arrived at the point when i need to save the player stats and the info of the levels, but in libgdx its not allowed to write the file inside folder of the application, only external (in the sd) is allowed, well, the point is that i want that my new file cat be seen by anyone, or if they see it how can i pass it to a binary file, so no one can see it. I just want to hide the file :P

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• Do emails from ShoppyBag contain virus or malware ?

  - by Sysadmin Evstar

  I am curious -- when the ShoppyBag virus gets sent to you from a compromised "friend", inside the message is a secret one-pixel IMG unique to your email address --- and when your GMail message pulls up the message and the IMG is loaded from their server and displayed, their server knows you have read the message. At that moment, does it then grab your Gmail address book, the Flash Cookies, and all the Local Shared Objects it can find, i.e. at the instant you READ the message with the ShoppyBag virus, is it already too late? Do you have to Delete it to the Trash , then Delete Forever it , without reading it to be safe?

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• Destination host unreachable

  - by user1010101

  I have 2 router connected to 1 switch which contains two vlans, 1 router has the ip table of vlan1 and the other router have the ip table of vlan2 I have trunked both router cable to the switch. I have set 1 ip table per router which correspond to the ip address of the PC that have this router address as a gateway. When I ping from 192.168.100.2 to 192.168.200.2 it tells me that destination host is unreachable and the message is from the router 192.168.100.1. So I guess router for 192.168.100.x does not see the router for 192.168.200.x , right ? Or am I wrong ? What are good troubleshooting steps ? http://i.imgur.com/b94Ir.png is the representation of the network, i cannot post image since im not reputated enough.

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• old .pst files on a networked drive still being accessed

  - by icecurtain

  Real quick question, A few months back I have set up email accounts exchange using AD on a domain all is fine. (email, address books ,calendars etc.) But I left the old .pst files on a networked drive. For some reason outlook the clients are still accessessing the old .pst not for (email, address books ,calendars). I have removed an account with no adverse effect as a test. But can any one tell me why outlook is still accessing the old .pst, as I was going to delete all the old .pst files until they all had todays timestamp on.

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• postfix: deliver mail to specific emai addresses locally and send the rest to relayhost

  - by sme

  I want to achieve the following with postfix: Almost all outgoing emails shall be sent via a relayhost, configured in main.cf with relayhost = my.mailserver There's one specific email address ([email protected]) for which I want the email to be delivered locally. I set up a local account on the machine to match the email address and added "mydomain.com" to the mydestination property in main.cf. Then of course postfix tries to deliver every email to @mydomain.com locally and bounces them because the respective user doesn't exist. Question http://serverfault.com/questions/149453/hybrid-gmail-mx-postfix-for-local-accounts seems to be somewhat related (though more complicated).

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• Cannot access Windows via grub after new dual-boot Ubuntu install

  - by user287474

  I previously installed Ubuntu on a computer that had Windows XP on it and got it successfully to run alongside it. (access both OS systems) Now I installed Ubuntu again on my MSI notebook with Windows 8.1, and I cannot access the GRUB without hitting escape on startup, and even then, I can no longer open windows. Before all of this, I created a recovery point, file history and saved a back up on a external hard drive incase I did anything wrong. Now how can I revert my computer back to it's state before installation.

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• Cannot access internal network on OSX 10.6.6

  - by cabuki

  Last week, I began having trouble connecting to our internal web servers. Usually, a refresh would take care of it or switching to a different wireless network, but as of yesterday, this wasn't enough. We have an internal DNS server using dnsmasq and a private internal host name (us.lcl). Once I started having more issues with the names not resolving, I tried pinging the server. Using the internal host name (s1.us.lcl), it failed. I tried using the IP address, but that also failed. I have no problems accessing external sites with the exception of it being a bit slower than normal. A reboot yesterday at lunch time after following the instructions here seemed to fix the issue, but when I came into the office this morning, it had stopped working. As of this posting, I cannot ping, ssh or access the web server using the internal host name or ip address. I'm the only one running 10.6 in my office and none of my colleagues has this issue.

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• Can I set up two NICs bridged together and still SSH into the bridging machine?

  - by squinlan

  I have a ubuntu box setup with two NICs. I can bridge them together just fine, but I haven't been able to setup a way to SSH into the box once the connections are bridged together. Here's my /etc/network/interfaces: auto lo iface lo inet loopback auto eth1 iface eth1 inet manual auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address 192.168.33.213 netmask 255.255.255.0 gateway 192.168.33.1 bridge_ports eth0 eth1 bridge_stp off bridge_fd 0 bridge_maxwait 0 This works just fine for bridging, but I'm not able to SSH into the box. I tried setting up another interface on one of the NICs: auto eth0:1 iface eth0:1 inet static address 192.168.33.215 netmask 255.255.255.0 gateway 192.168.33.1 But this really didn't help. Is it possible to ssh into a machine that has all of its NICs bridged? If it is, how?

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• Screen configuration not saved after first reboot

  - by user20795

  PROBLEM - When installing UBUNTU Natty on my friends Laptop with a HDMI cable attached to both TV and Laptop both screens echo each other BUT when reboot has taken place nothing is displayed on the external screen. Another user has reported the same problem so far ! http://ubuntuforums.org/showthread.php?t=1764389&highlight=hdmi - Gives a clearer description of what we are both experiencing The UBUNTU/Natty install drives both screens but the first reboot does not ? Any ideas anyone

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• Searching for and Off The Shelf software [on hold]

  - by rikket

  I am looking for an Off The Shelf Software to record video/audio from selected source on an inputed schedule. This schedule is inputed to the software through an external hard disk which can be removal (to update schedule). If anyone knows of a similar software, it would be of great help as I cannot find one for my requirement (will be used for my company, thus yes the company will pay for the license) Also sorry if I am posting in wrong section but did not know where else to post.

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• Wrapping a point-to-point link

  - by user3712955

  I'm using a pair of IP radios (non-WiFi) to bridge my office engineering LAN (172.0.0.0/8) to a lab in another building. The radios work fine, but they expose a web management interface I'd like to hide, and they also generate traffic (ARP, STP, and more) that I need to keep off my (very, very clean) LAN segments. I have some ARM-Linux boards (similar to Beagle/Panda/RasPi) running Ubuntu, and I've put one at each end of the link, between the radio and the LAN. Each of the boards has 2 wired Ethernet interfaces, eth0 and eth1. The LAN segments are connected to eth0, and the radios are connected to eth1. I'd like to accomplish the following: Keep radio-originated traffic off my LAN segments! Hide all services provided by the radio (web, ssh, etc.) Transparently pass all traffic between the LAN segments (including things like ARP). The above also applies to the ARM-Linux boards: No stray traffic my LAN from them either! I'd like the system to look like a switch: LAN packets arriving at one eth0 appear at the other. And neither eth0 should have an IP address: The working system should behave like a CAT6 cable with some latency (instead of ARM boards and radios). Unfortunately, I'm confused about how to properly configure the ARM Ubuntu systems. What I'm guessing I need is a bridge on each board (br0?) and a VLAN (vlan0 or eth0.0?) to isolate the LAN traffic from everything else as it passes through the ARM boards and the radios. Then I need some kind of a firewall to block sending anything out eth0 that isn't from the other eth0 (via the VLAN). I've looked at the ip and ebtables commands (especially -t broute). While the concepts sorta-kinda make sense, I'm completely lost in the details. Edit: In the perverse case that a system on one of my LAN segments has the same IP address as one of the radios, or as eth1 on the ARM-Ubuntu boards, a VLAN won't work. Which I believe means I need to tunnel all traffic between the two eth0 interfaces to get that "like a wire" behavior. Help? Finally, I'd like to have a way to temporarily expose services on the ARM boards (ssh) and the radios (web) for maintenance purposes. Ideally, it would expose an IP address with ssh available on port 22. Once connected, I figure I'd start an X11 session and run a browser on the ARM board to access the radios. Or something. I could login via the console to enable/disable this, or perhaps could use a GPIO to trigger a script. I feel I've identified most of the pieces needed to make all this happen, but I have no idea how to combine them to make a working system. Thanks!

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