What is cups?

Q: What does the Linux service cups do?

A: It is used to manage a print queue.  This service is only needed if you will be printing from the server.

Filed under: Uncategorized by — aaron @ 1:09 am

What is anacron?

Q: What does the Linux server anacron do?

A: It is like cron in that it schedules jobs, however assumes that the server is not always on.  This service is not needed unless you specifically are using it.

Filed under: Uncategorized by — aaron @ 1:08 am

What is rpcidmapd?

Q: What is the service rpcidmapd on Linux?

A: It is used for running an NFS server, and you only need to keep this service running if you are running an NFS server.

Filed under: Uncategorized by — aaron @ 1:04 am

Gallery Upgrade Error: Some files and or directories in your storage directory are not writeable by the webserver user

While upgrading gallery, you may come across with the following error while doing Step 2: System Checks

Error: Some files and or directories in your storage directory are not writeable by the webserver user.
Run chown -R webserverUser /home/abcduser/public_html/gallery/g2data/
OR run chmod -R 777 /home/abcduser/public_html/gallery/g2data/.

Even if you change the permissions / ownerships for g2data, you will get the same error.

This occurs when the versions.dat file is missing in the storage folder (g2data folder). You can create one by entering the following:

1.2.0.6
2.2

The second line is not significant. But you should enter the first line correctly. It must be the version of the g2 core module installed in the current gallery installation. You can get the version by executing this query in the MySQL database used by gallery.

SELECT g_parameterValue FROM g2_PluginParameterMap WHERE g_pluginId = ‘core’ and
g_parameterName = ‘_version’;

The output will be something like this:

+——————+
| g_parameterValue |
+——————+
| 1.2.0.6 |
+——————+

Once you create the versions.dat file, run the upgrade/index.php and run “System Checks”.

Filed under: Uncategorized by — aaron @ 12:08 am

404 Error when to accessing /wp-admin/admin-ajax.php

When you receive this error:ForbiddenYou don’t have permission to access /wp-admin/admin-ajax.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

If you are receiving this error, then its likely you have mod_security installed on your server, and you will need to update your mod_security rules.

Find the following in your mod_security configuration:

Only accept request encodings we know how to handle
# we exclude GET requests from this because some(automated)
# clients supply "text/html" as Content-Type
SecFilterSelective REQUEST_METHOD "!^(GET|HEAD)$" chain
SecFilterSelective HTTP_Content-Type "!(^application/x-www-form-urlencoded$|^multipart/form-data;|^text/xml;)"

Change it to:

# Only accept request encodings we know how to handle
# we exclude GET requests from this because some (automated)
# clients supply “text/html” as Content-Type
SecFilterSelective REQUEST_METHOD “!^(GET|HEAD)$” chain
SecFilterSelective HTTP_Content-Type “!(^application/x-www-form-urlencoded;|^multipart/form-data;|^text/xml;)”

If you don’t have access to mod_security configuration (i.e. you are not the administrator of the server), then you can add the following to a .htaccess file for your site:

<IfModule mod_security.c>
SecFilterInheritance Off
</IfModule>

Filed under: Uncategorized by — aaron @ 4:56 pm

How to block access from certain IPs in IIS – Windows

You can block access from certain IPs to IIS by going to:

IIS -> Website Properties -> Directory Security tab -> Edit IP Address restrictions

Filed under: Uncategorized by — aaron @ 6:42 pm

Disabling mod_security for a single account through .htaccess

Sometimes mod_security rules may cause problems for some sites, and give you 403 access denied messages. To disable mod_security on a single account, and prevent the 403 access denied error messages you can add the following to your .htaccess file:

SecFilterEngine Off

SecFilterScanPOST Off

Filed under: Uncategorized by — aaron @ 6:38 pm

How to view current configuration on a Cisco Pix 520-UR Firewall

First console into the switch, then do the following:

firewall> enable
Password: ************
firewall# configure terminal
firewall(config)# wr term
Building configuration…
: Saved
:
PIX Version 5.0(2)
nameif ethernet0 outside security0
nameif ethernet1 inside security100
nameif ethernet2 pix/intf2 security10
….

Filed under: Uncategorized by — aaron @ 1:11 am