Knowing how to Whitelist and Blacklist IPs in your firewall can be very important when you want to allow or deny connection to your server, based on an IP address. Below we will cover how to allow and deny connections from IPs in IP Tables, Firewalld, and UFW. IPTables: Allowing or Denying connections from IPs … Read more
Recently I encountered a server that had an Apache configuration file that was over 500,000 lines. Changes needed to make were to comment out the CustomLog line for each domain in /etc/httpd/httpd.conf. For this command, I used SED. NAME sed – stream editor for filtering and transforming text SYNOPSIS sed [OPTION]… {script-only-if-no-other-script} [input-file]… DESCRIPTION Sed … Read more
CIFS stands for Common Internet File System. This is application-level network protocol mainly used to provide shared access to files, printers, serial ports, and miscellaneous communications between nodes. You can access CIFS share from Linux and mount them as a regular filesystem. This is handy if there is a backup service like Infrascale where you … Read more
Here it is: https://support.google.com/mail/contact/msgdelivery
The basic formulas are: Available RAM = Global Buffers + (Thread Buffers x max_connections) max_connections = (Available RAM – Global Buffers) / Thread Buffers To get the list of buffers and their values: Here’s a list of the buffers and whether they’re Global or Thread: Global Buffers: key_buffer_size, innodb_buffer_pool_size, innodb_log_buffer_size, innodb_additional_mem_pool_size, net_buffer_size, query_cache_size Thread Buffers: … Read more
Here is how to add a second disk to linux. In this article, the OS is CentOS 7. Check to see how many drives are installed: You can do this using the df and fdisk command: The above information show the primary disk as sda. Use fdisk to identify the second drive: The sdb drive … Read more
How Cron works: Examples: 5 minutes after midnight each day
Instructions Login to your Plesk server. Select the domain you wish to enable gzip for from the left hand side. Click in Apache and nginx settings: Down the bottom, add the following to the “Additional nginx directives” field: Click OK to save. Verify with GTMetrix.com Another way is to set up deflate. First you need … Read more
Included in NMap is a script called ssl-enum-ciphers, which will let you scan a target and list all SSL protocols and ciphers that are available on that server. You can also narrow it down by specifying a port number with the -p option. This tool comes in handy if you’re doing a vulnerability scan and … Read more
When getting an error in Windows 2008 R2, Error 401: Unauthorized: Access is denied due to invalid credentials See – https://www.codeproject.com/Answers/418802/Unauthorized-Access-is-denied-due-to-invalid-c#answer1 Specifically Solution 6 with a minor adjustment. Right click on the folder in Explorer and choose Properties. In Security tab add ‘IIS_IUSRS’ and ‘NETWORK SERVICE’ and give full control to both user. Also check … Read more