azure-iplookup

Lookup a given ip against Azure IP / Servicetag json file to find out if it's a valid Azure IP and find which service it belongs to. Also supports lookup against your own custom cidr ranges.

Credits

• Using AngleSharp library for parsing html and fetching download link of the json file.
• Using IPNetwork2 library for parsing CIDR ranges and lookup IP in the CIDR.

Setup and PreRequisites

• Requires .net core 3.1 runtime installed.
• (Optional - Supports downloading it now) Download the latest servicet tag json from Azure IP Ranges and Service Tags – Public Cloud
• (Optional - Supports downloading it now) Copy it to this applications directory and rename it as ServiceTags_Public_Active.json
• (Optional) - Supports dowing lookup against your custom CIDR Range files.

Instruction on how to use

• Navigate to the app directory.
• Run dotnet run --update to download the latest servicetags json file.
• Run dotnet run for prompts
• Run dotnet run IP to do a lookup of an IP against the servicetags json file downloaded.
• Run dotnet run IP Filename to do a lookup of an IP against the servicetags json file mentioned in the filename.
• Run dotnet run FileWithIpList to do a lookup of a List Of IPs from a txt file against the json file in the app dir.
• Run dotnet run FileWithIpList FileWithCIDRList to do a lookup of a List of IPs from a txt file against either the Azure ServiceTag json file or your own custom CIDR list file.

Example 1 :

❯ dotnet run
Enter IP or the path to the file with list of IPs for searching in Azure IP/ServiceTag Ranges :
20.190.167.64
Enter name of the json file ( if not specified ,ServiceTags_Public_Active.json will be used ) :

------IP--------|----Matched----
 20.190.167.64  , 20.190.128.0/18 - AzureActiveDirectory

Example 2 :

❯ dotnet run 20.193.17.157
------IP--------|----Matched----
 20.193.17.157  , 20.193.0.0/18 - AzureCloud.australiaeast

Example 3 : Specify a json file

dotnet run 20.193.17.157 "ServiceTags_Public_Active.json"
IP : 20.193.17.157, Matched IP Range is 20.193.0.0/18 - AzureCloud.australiaeast

Example 4 : Download Updated version of the json file

dotnet run --update
Latest Service Tag Json file downloaded
Previous ServiceTags_Public_Active.json renamed to ServiceTags_Public_Arhive_11032021.json
Newly downloaded file ServiceTags_Public_20210308.json renamed to ServiceTags_Public_Active.json

• When a latest json file does not exist in your local:

dotnet run --update
Latest Service Tag Json file downloaded
Newly downloaded file ServiceTags_Public_20210315.json renamed to ServiceTags_Public_Active.json

Example 5 : Read IPs from a txt file and then do lookup against your own CIDR file list #1

❯ dotnet run
Enter IP or the path to the file with list of IPs for searching in Azure IP/ServiceTag Ranges :
ListOfIps.txt
Enter name of the json file ( if not specified ,ServiceTags_Public_Active.json will be used ) :

------IP--------|----Matched----
 20.190.167.64  , 20.190.128.0/18 - AzureActiveDirectory
 20.190.167.65  , 20.190.128.0/18 - AzureActiveDirectory
 10.20.10.3     , No Match

Example 6 : Read IPs from a txt file and then do lookup against the json #2

❯ dotnet run ListOfIPs.txt
------IP--------|----Matched----
 20.190.167.64  , 20.190.128.0/18 - AzureActiveDirectory
 20.190.167.65  , 20.190.128.0/18 - AzureActiveDirectory
 10.20.10.3     , No Match

❯ dotnet run ListOfOnPremIPs.txt OnPremCIDR.txt
------IP--------|----Matched----
 10.9.221.38    , No Match

Example 7: Read IPs from a txt file and then do lookup against either servicetag json file or your own custom cidr list file.

❯ dotnet run ListOfOnPremIPs.txt OnPremCIDR.txt
------IP--------|----Matched----
 10.9.221.38    , No Match
 10.8.243.127   , No Match
 10.5.227.253   , 10.5.2.1/16 - Default_Autogenerated
 10.6.94.174    , No Match
 10.8.252.159   , No Match
 10.5.93.140    , 10.5.2.1/16 - Default_Autogenerated
 10.6.63.131    , No Match
 10.7.232.85    , No Match
 10.7.232.220   , No Match
 10.8.221.139   , No Match
 10.8.14.71     , No Match
 10.7.88.170    , No Match
 10.7.119.97    , No Match
 10.7.207.96    , No Match
 10.9.168.60    , No Match
 10.6.65.24     , No Match
 10.5.175.247   , 10.5.2.1/16 - Default_Autogenerated
 10.6.90.149    , No Match
 10.7.133.232   , No Match
 10.7.192.145   , No Match