Optimizer Firewall Whitelist Debugging Guide

Having trouble whitelisting a domain on your RedPort Optimizer? Here is a list of gotchas that can interfere with successful setup of domain whitelisting.

  1. Verify connection of the Optimizer to the Internet. You can do this in Network/Diagnostics window with a traceroute or ping.
  2. In the Network/Lan Settings Make sure that option 66 is removed from DCHP options, forget the Network and rejoin the optimizer Network.
  3. Flush the DNS Cache on the computer.
    1. ON windows you can run cmd as an administrator run ipconfig /flushdns
    2. ON mac See steps below.
      1. Open the terminal by using Spotlight Search or by pressing Command + Space and then type Terminal.
      2. Double click the application icon for Terminal to open it.
      3. Type in “sudo dscacheutil -flushcache;sudo killall -HUP mDNSResponder” without quotes.
      4. Enter your Mac's password.
    3. Alternatively wait 5 minutes with the computer not on the internet for cached DNS to expire.
  4. If this is still not working, then enable the checkbox “Write DNS requests to syslog”. (see figure When you go to status/systemlog do you see the dns requests in the syslog. Make sure yours are getting answered. See figure 3. The green text shows successfully answered dns lookups while the red text is successfully blocked dns lookup from undesired requests.
  5. If you do not see requests in step 4 then you repeat step 3.   Confirm you can reach the optimizer’s interface. If so, then you are connected. Confirm the customer has not configured a custom DNS setup on wifi network. Verify that there are no other interfaces where the traffic is being sent.