IT Network Hardware / Software

How to find IP address any device on network

I wish I had discovered how to do this years ago.  Need to determine the admin IP of a firewall switch or other network device on the same switch that you are plugged into?, here is a slick way: First determine the MAC Organizationally Unique Identifier (OUI), which is the first half of the MAC address.  There are various databases online to determine this by vendor/device.  Once you determine it issue the commands below (my commands have mimosa MAC as an example) Windows / DOS: arp -a Read more [...]

Cisco DPC3939 allow inbound traffic

Comcast is now replacing many of the failed Netgear routers with the Cisco DPC3939.  The DPC3939 can be difficult to work with in terms of enabling inbound traffic.  Firewalls are of course dependent upon inbound traffic flow in order to perform NAT and traffic filtering functions. In order to allow inbound traffic the following checkbox must be checked: Advanced > Disable all rules and allow all inbound traffic through Note: you may also need to disable the firewall in the Cisco Read more [...]

How to flush the DNS Cache on Mac OS X

According to Apple: "OS X keeps a local cache of resolved DNS queries for a time defined by the DNS server, but sometimes it may be necessary to reset the cache immediately and re-query a DNS server. For example, you might do this after an entry on the server is changed or a new entry is added." Below are steps for clearing the Cache in Yosemite (10.10.x) and older.  If you have High Sierra (10.13.x) or newer, use this link to clear the Mac OS DNS Cache in High Sierra and newer. To flush the DNS Read more [...]

Basic Setup of Aerohive AP and Guest Network

Unbox and plug in the Aerohive Access Point (AP) AP will phone home to Hive Manager online Devices > All Devices > Add Device Enter the device serial number AP will associate with appropriate Hive Manager Instance In the meantime lets create the Network Policy: Select Guided Configuration Create new Network Policy Check ‘Wireless Access’ checkbox Create SSID: Click Choose next to SSID Input Profile Name and SSID name Seled SSID Access Security type, in this case WPA/WPA2 Read more [...]

Import .pfx certificate from IIS to NetScaler VPX

If you haven't done so already, you will need to export your SSL certificate from your Windows Server to a .pfx file.  Be sure to review that link, it's important to do the .pfx export step just right.  If you don't own an SSL Certificate yet, I recommend NameCheap, the banner below will usually give you a good discount. Now that we have a good .pfx certificate file, we can begin working on importing the cert into the Citrix NetScaler: Logon to the Netscaler and click SSL Certificates > Read more [...]