Finding issues in wireless networks can be hard , however there are some tools you can use before you get the Spectrum Analyser in!
Great way to visualise SSID strength and channels, just to note when you run this , your Pings will go up!
Great Heatmapping software and paid for software for scanning
How to check to DeAuths
Once you identify the channel, launch https://www.wireshark.org/ on that channel and listen for a minute or two.
First, apply this filter:
wlan.fc.type_subtype == 0xc
This will show you all the deauthentication frames that have been sent out.
Apply this filter next:
wlan.fc.type_subtype == 0x8 && wlan.sa == <BSSID of the SSID you are inspecting>
This will display beacon frames from your AP. Check the signal strength. In this case, we’ve got a good strong signal because we’re right next to the AP (right around -40 dBm on average).
Next, apply this filter:
wlan.fc.type_subtype == 0xc && wlan.sa == <BSSID of the SSID you are inspecting>
This shows deauthentication frames from your AP. Note the signal strength on the far right…
The deauthentication frames are coming in much weaker than the valid beacon frames. This indicates strongly that another AP is spoofing your system.
Connect to http://wired.meraki.com/#configure on a PC/Server connect to the meraki. The default username is the serial number of the device which can be got from the Cloud Dashboard and password is blank
The following will restart the Meraki so make sure you arrange downtime.
Change Port 2 to Internet from LAN and add the IP details and click Save
Make sure all ethernets are set to Auto for Negotiation
By default the Meraki will put the connections on Active / Passive , to enable Active / Active
Login to your Meraki Cloud Dashboard and Enable Load Balancing :
This will spread both inbound and outbound via both links
To force one port e.g. to a specific Link , add an Internet Traffic Flow setting
Get Model Number and Serial for Firmware
Login to your switch via SSH and run
This will show you the System Type ( Model of the switch ) and if its stacked, now type
This will show you your current firmware and Also Serial Number ( In Red )
1. Go to Extremenetwork Support and Click Downloads for ExtremeXOS for your switch model
2. Login using your account. You have to register if you don’t have account.
3. Click Accept All.
4. Type the serial number.
5. Click Software Downloads.
6. Click the correct ExtremeXOS image and download to your tftp server.
Free tftp tools such as tftp32 will work for the switch upgrade
Make sure Port UDP 69 is allowed through Windows Firewall
Even if your windows Firewall is disabled , make sure its disabled on Guest Networks as this will usually be the network the management speaks on not domain
Make sure the machine you are using does not have WDS enabled , WDS uses TFTP
Run TFTP and make sure the server is listening on an Network IP ( NOT 22.214.171.124 )
Copy the .xos file to the TFTP Directory
In SSH make sure you can Ping the IP of the TFTP server from the Switch via
ping %IP OF TFTPServer%
And you get a reply
Backup Existing Config
upload config %IP OF TFTPServer% config.xsf VR-Default
Download and install new Image
download image %IP OF TFTPServer% summitX-126.96.36.199-patch1-8.xos “VR-Default” secondary\
Do you want to install image after downloading? (y – yes, n – no, – cancel) Yes
You will need to reboot the switch and if the switch is in a stack you will need to reboot them both as Stack switches cannot be in different versions
The Category blocked was Alcohol, however, I whitelisted this category. Disabling the filter based category allowed this.
Problem was the Fortigate GUI was not displaying the actual committed config on the firewall ( the profile was screwed )
this way the “default” profile was visible
Also you might want tod DNS Filter
basically DNS filters work like webfilter but at DNS level
so let say you want to go to youporn
the firewall try to resolve the name of youporn.com but since it is a blocked category
it blocks the resolution of the name even before you get to browse itWe saved this conversation. You’ll see it soon in the Conversations tab in Skype for Business and in the Conversation History folder in Outlook.
You might have setup a new Ubiqiti access point using a controller based at another site, which is not the final destination of the device, so it is no longer configurable when you get to the new site.
If you can get the Old controller back up and connect to the access points you can use the below to move the Access Points to a new site via the Site Migration
If you cannot connect to the old controller anymore you can try logging into the access point via IP and doing:
You can use the Same Old Controller name :
- SSH into AP with former controller’s credentials
- in controller, forget AP
- reset to default with ‘syswrapper.sh restor-default’
connection will be terminated
- SSH into AP with ubnt/ubnt
- use mca-cli shell
- set-inform x.x.x.x:8080/inform
- where x.x.x.x is the ip of the new unifi controller
- in controller, adopt the AP
- repeat step 7 after adoption (sometimes this is necessary to get to provisioning)
- AP will reboot and provision
Finally you can perform a factory reset on the device to join it to a new controller
Long Distance Capable of high-speed, 30+ km links.
When a user VPN into a Fortigate Router , make sure they can access all Subnet available to the router not just the local one :
- Added security policy – allow from SSL VPN interface to IPsec VPN
Name : SSL VPN to New Subnet
Incoming Interface : SSL-VPN tunnlel Interface ( ssl.root )
Outgoing Interface – %Interface of Site to Site VPN for Remote Site%
Source : SSL VPN Client Range / SSLVPN_Users
Destination Address : %new subnet%
Schedule : Always
Service : ALl
Action : Accept
Nat : Enabled ( to traverse IPsec VPN as local address (192.168.0.x) as opposed to SSL VPN client range (192.168.1.x)
IP Pool Configuration : Use Dymanic IP Pool and NAT Pool for SSL VPN Clients
2. Make you have DHCP NAT pool Range excluded from your onsite DHCP
3.Added New Subnet to routing address in SSL VPN portal – tunnel mode
VPN – > SSL VPN Portals
Tunnel Mode -> Enable Split Tunnelings -> Routing Address