Cisco
Whenever you do a ping or traceroute in Cisco IOS it tells you to “Type escape sequence to abort”. It would be handy if the IOS actually told you what the escape sequence is. To abort type CTRL-SHIFT-6 twice.
If you intend to run an internet facing FTP server you have 2 options for FTP, active or passive. The easiest option for an FTP server administrator is the active mode. In active mode the client makes a connection to the server on port 21. The server then makes an outbound connection on port 20 to the client on a random port (>1023) for data transfer. So for the FTP server administrator the only port redirection required is port 21, and firewall access required is port 21 inbound and 20 outbound. While this is great for the FTP Server admin your clients will most likely fail to achieve any data transfer. This is because most clients will have some form of firewall in place which will prevent the server from making the connection to the random port. Read more about How to run a PASSIVE FTP server on Windows Server with a Cisco Router …
As the mantra says: prevention is better than cure. This is particularly so when it comes to being blacklisted for SPAM. Cleaning up after being listed can take days, and in the mean time you’ll find your client’s email being rejected by various mail servers and basically becoming very unreliable. Read more about How to create a Cisco ACL to protect your business from being SPAM blacklisted …
I was sent a link to a great article on the NIC teaming options available for ESX hosts and how to configure teaming on the ESX Hosts via vSphere. It also provides examples of what needs to happen on the network infrastructure (CISCO used in this example) to make it happen. All to often articlesRead more about NIC teaming and VMware ESX hosts[…]