mod_evasive doesn’t work with current Apache

Starting with Apache 2.4.1, mod_evasive stores the violation counts PER CHILD. Attackers don’t hit the same child enough times in the time interval to trip the system. This article describes why mod_evasive is no longer useful in modern apache implementations.

Configuring SNMPv3 in SonicOS

Article Applies To: Gen6 SM E10000 series: NSA E10800, NSA E10400, NSA E10200, NSA E10100 Gen6 SM 9000 series: NSA 9600, NSA 9400, NSA 9200 Gen6 NSA Series: NSA 6600, NSA 5600, NSA 4600, NSA 3600, NSA 2600 Gen5 NSA E-Class series: NSA E8510, E8500, NSA E7500, NSA E6500, NSA E5500 Gen5 NSA series: NSA 5000, NSA 4500, […]

Configuring Active Directory/LDAP over TLS on SonicOS

Article Applies To: Active Directory Firmware/Software Version: Sonic OS Enhanced Services: LDAP over TLS Feature: This article explains how to integrating SonicWALL appliance with an LDAP directory service using SSL . This requires configuring your LDAP server for certificate management, installing the correct certificate on your SonicWALL appliance, and configuring the SonicWALL appliance to use the information from the LDAP […]

HOWTO: Update WP Plugins without File Transfer Protocal

In the interest of security we moved many of our websites to a new server and found that plugins suddenly refused to update without File Transfer Protocal credentials. This was obviously fine when wanted to do the updates and knew the FTP credentials but presented a problem because we like to encourage our clients to perform […]

The Effect of Solid State Disks on Processor Usage

I am now encountering servers and client computers that have solid state disks (SSDs). My experience is showing that this sometimes causes improper analysis of performance measures through Performance Monitor (perfmon.exe) and Resource Monitor (accessible through the Resource Monitor button on the Performance table of Task Manager). In the past, poor interactive response time of […]

PRTG – Exception from HRESULT: 0x8024402

PRTG Keywords Paessler PRTG System Monitoring Sensor Windows Update powershell Problem/Error Message Exception from HRESULT: 0x8024402C Cause This PRTG error occurs if the monitored server has a bad DNS address you will receive this error. This is typically a local Windows Active Directory domain. Resolution Ensure that all DNS addresses used on the monitored server […]

HOWTO: Upgrade firmware on Sennheiser OfficeRunner

Sennheiser OfficeRunner     It can sometimes be difficult to figure out how to update your firmware when working with a Sennheiser OfficeRunner headset but it’s really quite simple once you know the steps. Plugin the headset base to your computer using a USB cable Download and install the Sennheiser HeadSetup software. Right-click the new […]

Zabbix frontend shows “zabbix server is running” No

, ,

Zabbix Problem & Solution    This occurs when you confirm that the service is running, but the frontend still won’t show server is running. Found that turning off SELinux with setenforce 0 would fix the problem, so it is clearly SELinux related. The problem is that by default, SELinux prevents apache/php from connecting to network […]

Password change on Cisco 3550 Switch

While troubleshooting a switch for a client I wanted to change the configuration register of the switch to boot from a different location. The “show version” command shows that the configuration register is located at 0x10F which is strange considering it is different than any other switch I’ve seen. After much googling I found that […]

iPhone ARP Requests Flood LAN

Upon further investigation I realized that no one was getting an IP address even though the links were up between my switches and DHCP server.

Sonicwall Gateway Antivirus Causes Slow Downloads

  HOWTO: Speed up Sonicwall Downloads We found that our Sonicwall would cause all downloads to start very fast, slow down quickly, and eventually stop. This occurred with major corporate download sites. The download went to low KB/s before dying. A download time estimate would indicate hours and days remaining. We discovered that turning off […]

Problems with Hosted Network

Known Personal Area Network / WiFi Sharing problems: Connectify Windows has encountered an error initializing hostednetwork. (CF001006) Virtual Router Error netsh wlan start hostednetwork The hosted network couldn’t be started. A device attached to the system is not functioning. Cause The problem is caused when VMware Virtual Ethernet Adapter for VMnet1 / VMnet0 (from VMware […]