El conocimiento al alcance de todos.

Thanks to: http://www.petenetlive.com/ Problem While putting in a New Exchange 2010 server today, I test moved a mailbox to this new site, and could not get mail to flow to the Exchange 2010 server at the clients main site. 451 4.4.0 Primary target IP address responded with: "451 5.7.3 Cannot achieve Exchange Server authentication." Attempted failover to alternate host , but that did not succeed. Either there are no alternative hosts, or delivery failed to all alternative hosts. Mail flowed from the main site to this new site, and internal mail at the new site was fine, but any mail destined for the main site, or going external (because the main site has the only server that can use the Exchange organization send connector) would fail with this error. Solution I did a lot of trawling to try and find the answer to this, and discovered lots of reasons for this to happen, so rather than just posting what fixed mine, from the most popular to the most obscure try ...

Thanks to: http://itzecurity.blogspot.com/ ASA-ASA VPN: One Static & One Dynamic address To configure a Site to Site VPN between 2 Peers ; one with a Dynamic IP and the other with a static IP a dynamic crypto map is used.However as the static based peer will be unaware of the remote peers IP the VPN can only be initated from the dynamic side.   Note  : Unlike other vendors (such as the Juniper SRX), main mode is used for phase 1 negotiations between the dynamic/static based peers (this can be confirmed via the command 'sh vpn-sessiondb detail l2l'). On the Peer that has a static IP, the configuration is pretty standard. The only difference being is that a dynamic crypto map is configured.A dynamic crypto map is a crypto map that does not have all of the parameters defined, these are then later learnt at the point that the IPsec tunnel is formed. Note  : The dynamic crypto map should have the highest sequence number within the crypto map...

Thanks to: http://www.sevenforums.com/    Information A theme pack is a cab file (.themepack) that includes a desktop background, window colors, sounds, screen saver, icons, and mouse pointers (cursors) used to change your  Windows 7  theme all at once instead of each individual item. A theme pack (.themepack) file will allow you to share your theme with family and friends. This will show you how to create, save, install, and delete a theme pack. The  Windows 7 Starter  and  Home Basic  editions do not have this feature included in them.  OPTION ONE  To Make a Theme Pack NOTE:   If you have not already, then you will need to customize your current Windows 7 theme to how you want the theme pack to be saved as by changing the items you want listed below . 1.  Change the  Desktop Background  picture and settings. 2.  Change the  Window Color and Appearance  settings. 3.  Change th...

here is an example: switch#sh flash Directory of flash:/ 2 -rwx 99 Feb 24 2005 11:16:03 -05:00 private-config.text 3 -rwx 8149 Feb 24 2005 11:16:03 -05:00 config.text 4 -rwx 804 Jun 10 2004 18:45:09 -04:00 vlan.dat 6 -rwx 342 Jun 10 2004 11:36:32 -04:00 system_env_vars 24 drwx 192 Jun 10 2004 11:36:23 -04:00 c3550-i5q3l2-mz.121-20.EA2 7 -rwx 18 Jun 10 2004 11:36:32 -04:00 env_vars 15998976 bytes total (8269312 bytes free) c3550-i5q3l2-mz.121-20.EA2 is the directory that the IOS file is in This gives you the IOS file name in the directory switch#cd flash:/c3550-i5q3l2-mz.121-20.EA2 switch#sh flash Directory of flash:/c3550-i5q3l2-mz.121-20.EA2/ 25 drwx 2688 Jun 10 2004 11:34:50 -04:00 html 107 -rwx 4219426 Jun 10 2004 11:36:23 -04:00 c3550-i5q3l2-mz.121-20.EA2.bin 108 -rwx 252 Jun 10 2004 11:36:23 -04:00 info 15998976 bytes total (8269312 bytes free) Next copy the IOS to the tftp server switch#copy flash tftp Source filename [flash:/c3550-i5q3l2-mz.121-20.EA2.bin]? flash:/c3550-i5q3l2-m...

thank to:http://thommck.wordpress.com/ Jump down to Step 1 to skip the blurb Any Microsoft Windows operating system has services. These are little programs that run in the background of the OS to keep things ticking over. They’re really fundamental to servers as it means that programs can run in the background without any user being logged. In fact Windows servers are fine-tuned to give better performance to background services rather than any app running on the screen. It’s always the best principle to log on with the least amount of privileges on any PC, i.e. you shouldn’t log on to a desktop or server with full admin rights. You should log on as a normal user and only elevate the  programmes authority to admin level if absolutely necessary. Some System Administrators may want an easy life and just let everything “run as admin” as it cuts back on a lot of problems, especially when using old software. Obviously this greatly widens the security attack vector, as any user w...

Thanks to: http://thommck.wordpress.com/ Internet Explorer 10 was released for Windows 7 and Windows Server 2008 R2 machines back in February 2013. Nine months later and we are going through it again with  Internet Explorer 11 . For SysAdmins and IT Pros managing software updates, these new versions led to quite a significant change in how we use Group Policy to manage them. I only recently discovered that when Windows 8 (and along with it IE10) was released they finally got rid of the “Internet Explorer Maintenance” Section of the Group Policy Editor. This section always struck me as an odd place to configure IE settings and I’m still not sure why they couldn’t just use the normal Administrative Template section. Internet Explorer Maintenance in Server 2003 Group Policy Editor Below is an excerpt from the technet article  Replacements for Internet Explorer Maintenance  from the  IE10 Deployment Guide In earlier versions of the Windo...