UDM Pro commands

List of commands to troubleshoot UDM Pro;

The best command for packet related issues is tcpdump

tcpdump <interface> -w <filename.pcap>

Most of the commands are just Linux commands. However some are unique to the UDM/UDM-P.

Cisco/EdgeOS/VyOs Command/Best descriptionUDM/UDM-P SSH Command
show versioninfo
show system hardware and installed softwareubnt-device-info summary
show cpu tempetureubnt-systool cputemp
show fan speedubnt-fan-speed
show uptimeuptime
show ip routenetstat -rt -n
show tech-support (dump a file for tech support)ubnt-make-support-file <file.tar.gz>
show ppp summerypppstats
show current userwhoami
show logcat /var/log/messages
show interface summaryifstat
show interfacesifconfig
show other Ubiquiti devices on local LAN segment (ubnt-discovery)ubnt-tools ubnt-discover
show config (wireless)cat /mnt/data/udapi-config/unifi
show DHCP leases (to NSname)cat /mnt/data/udapi-config/dnsmasq.lease
packet capturetcpdump
shutdownpoweroff
reloadreboot
show ipsec saipsec statusall
factory resetfactory-reset.sh
show system burnt in MAC addressubnt-tools hwaddr
Unifi Server commands (logs files)
show unifi server logscat /mnt/data/unifi-os/unifi/logs/server.log
show unifi server setttingscat /mnt/data/unifi-os/unifi-core/config/settings.yaml
show unifi server http logscat /mnt/data/unifi-os/unifi-core/logs/http.log
show unifi server http logs (errors)cat /mnt/data/unifi-os/unifi-core/logs/errors.log
show unifi server discovery logcat /mnt/data/unifi-os/unifi-core/logs/discovery.log
show unifi system logscat /mnt/data/unifi-os/unifi-core/logs/system.log

Tested with 1.8.3-5

To restart UDM Pro to release memory pressure without restarting, SSH and enter this;

unifi-os restart

To update udm pro software;

Start unifi shell = “unifi-os shell” and then apt update && upgrade

Resource

Click this link to see the reference.

Protected web api configuration

Like web apps, the ASP.NET and ASP.NET Core web APIs are protected because their controller actions are prefixed with the [Authorize] attribute. The controller actions can be called only if the API is called with an authorized identity.

Consider the following questions:

  • Only an app can call a web API. How does the API know the identity of the app that calls it?
  • If the app calls the API on behalf of a user, what’s the user’s identity?

Read more here;

https://docs.microsoft.com/en-us/azure/active-directory/develop/scenario-protected-web-api-app-configuration

How to use AppSettings.json in Azure Web App and Web API?

In App Service, app settings are variables passed as environment variables to the application code.

For ASP.NET and ASP.NET Core developers, setting app settings in App Service are like setting them in <appSettings> in Web.config or appsettings.json, but the values in App Service override the ones in Web.config or appsettings.json. You can keep development settings (for example, local MySQL password) in Web.config or appsettings.json and production secrets (for example, Azure MySQL database password) safely in App Service. The same code uses your development settings when you debug locally, and it uses your production secrets when deployed to Azure.

Let’s say we have this AppSettings file;

{
  "ConnectionStrings": {
    "MyDB": "Data Source=localhost;Initial Catalog=ZooDB;Persist Security Info=True;User ID=monkey;Password=pepepe",
    "MyLog": "Data Source=localhost;Initial Catalog=ZoodDBLog;Persist Security Info=True;User ID=banana;Password=eat"
  },
  "AllowedHosts": "*"

The connection settings on Azure Api App or Web App blade under configuration would be;

First Database

Name
MyDB

Value
Data Source=remotehost.com;Initial Catalog=ZooDB;Persist Security Info=True;User ID=remoteMonkey;Password=xxxee

Type
SQL Server

Second Database

Name
MyLog

Value
Data Source=remotehost.com;Initial Catalog=ZooDBLog;Persist Security Info=True;User ID=remoteMonkey;Password=xxxee

Type
SQL Server

Let’s say we have these hierarchal settings in AppSettings file;

"ApplicationSettings": {
    "CanImpersonate": "true",
    "GenerateJwt": "false",
    "ActiveDirectorySource": {
      "DataSource": "Database",
      "ActiveDirectory": {
        "Username": "variable",
        "Password": "variable",
        "DomainName": "variable",
        "EmailKey": "mail",
        "FirstNameKey": "givenName",
        "LastNameKey": "sn",
        "PhoneKey": "telephoneNumber",
      },
      "Database": {
        "ConnectionString": "Data Source=localhost;Initial Catalog=ZooDB;Persist Security Info=True;User ID=monkey;Password=pepepe",
        "Table": "ad.monkeytable",
      }
    },
"AllowedHosts": "*"

The connection settings on Azure Api App or Web App blade under configuration would be;

Name
ApplicationSettings:ActiveDirectorySource:Database:ConnectionString

Value
Data Source=remotehost;Initial Catalog=ZooDB;Persist Security Info=True;User ID=monkey;Password=pepepe

Type
SQLServer

If there are application settings other than connection string, they would be configured like this;

Name
ApplicationSettings__ActiveDirectorySource__Database__Table

Value
ad.monkeytable

The only difference between single and hierarchal structure is addition of : and __ qualifier’s (Two underscores connected).

When reading in ASP.NET core application, hierarchy can be stepped down with (:). for example;

# get value from appsettings
var logConnectionString = configuration.GetSection("ApplicationSetting:ConnectionStrings:LogDatabase");

#use the value
Console.WrtieLine(logConnectionString.Value);

If for some reasons, above configuration doesn’t work, try to publish to app service using Visual Studio publish feature. Make sure to add connection dependency manually.

Sources

https://techcommunity.microsoft.com/t5/apps-on-azure-blog/asp-net-core-appsettings-for-azure-app-service/ba-p/392596

https://docs.microsoft.com/en-us/azure/app-service/configure-common?tabs=portal

https://docs.microsoft.com/en-us/azure/app-service/configure-language-dotnetcore?pivots=platform-windows#access-environment-variables

Cannot start the web project because administrative privilege’s are required..

While troubleshooting ASP.NET web form project, I hit by this error;

The solution is to Unload  and edit project properties. Delete these lines;

<DevelopmentServerPort>4192</DevelopmentServerPort>
<IISUrl>http://localhost/CPSWEB</IISUrl>

from this XML segment;

  <ProjectExtensions>
    <VisualStudio>
      <FlavorProperties GUID="{349c5851-65df-11da-9384-00065b846f21}">
        <WebProjectProperties>
	…..
	----
        </WebProjectProperties>
      </FlavorProperties>
    </VisualStudio>
  </ProjectExtensions>

Reload project and it should work fine.

Resources

https://stackoverflow.com/questions/13454705/running-iis-express-with-admin-privileges