Home
%3CLINGO-SUB%20id%3D%22lingo-sub-369162%22%20slang%3D%22en-US%22%3ELesson%20Learned%20%2358%3A%20Virtual%20Machine%20and%20its%20Load%20Balancer%20IP%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-369162%22%20slang%3D%22en-US%22%3E%0A%20%26lt%3Bmeta%20http-equiv%3D%22Content-Type%22%20content%3D%22text%2Fhtml%3B%20charset%3DUTF-8%22%20%2F%26gt%3B%3CSTRONG%3EFirst%20published%20on%20MSDN%20on%20Jan%2016%2C%202019%20%3C%2FSTRONG%3E%20%3CBR%20%2F%3E%20Hello%20Team%2C%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20Time%20Ago%20I%20worked%20in%20a%20service%20request%20that%20our%20customer%20reported%20that%20their%20outbound%20IP%20has%20changed%20without%20any%20notice.%20Working%20on%20this%20issue%20I%20have%20found%20an%20interested%20situation%20to%20identify%20IP%20of%20the%20load%20balancer%20of%20a%20virtual%20machine%20running%20on%20Azure.%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20I%20created%20two%20virtual%20machines%20using%20the%20same%20VNet.%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20The%20first%20machine%20has%20the%20Public%20IP%3A%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20%3CIMG%20src%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F89099i7785DBBCEA396BF2%22%20%2F%3E%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20The%20second%20machine%20has%20not%20a%20Public%20IP%3A%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20%3CIMG%20src%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F89100i13335F219E5A6041%22%20%2F%3E%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20When%20I%20try%20to%20connect%20to%20my%20Azure%20SQL%20Database%20server%20xxxx.database.windows.net%20I%20have%20found%20the%20following%20scenarios%3A%20%3CBR%20%2F%3E%3CUL%3E%3CBR%20%2F%3E%3CLI%3EThe%20machine%20without%20public%20IP%26nbsp%3Bis%20using%20an%20IP%2052.169.0.41.%20Searching%20the%20outbound%20connection%20for%20Virtual%20Machines%20I%20have%20found%20the%20following%20URL%20that%20explains%20this%20IP%20is%20coming%20from%20%3A%20%3CA%20href%3D%22https%3A%2F%2Femea01.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Fdocs.microsoft.com%252Fen-us%252Fazure%252Fload-balancer%252Fload-balancer-outbound-connections%253Ftoc%253D%25252fazure%25252fvirtual-network%25252ftoc.json%26amp%3Bdata%3D02%257C01%257C%257C84ef232ac2b44aeb7b4308d644bac2da%257C72f988bf86f141af91ab2d7cd011db47%257C1%257C0%257C636771966321524609%26amp%3Bsdata%3DISj%252BertsI62NECG2AsJE1TekuNYfcKva0aj1SfifR0I%253D%26amp%3Breserved%3D0%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3E%20https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fazure%2Fload-balancer%2Fload-balancer-outbound-connections%3Ftoc%3D%252fazure%252fvirtual-network%252ftoc.json%3C%2FA%3E%3C%2FLI%3E%3CBR%20%2F%3E%3CLI%3ERunning%20the%20nslookup%20myip.opendns.com%20resolver1.opendns.com%20I%20obtained%20the%20same%20IP%20%3CIMG%20src%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F89101iC5EBE1D288656D67%22%20%2F%3E%3C%2FLI%3E%3CBR%20%2F%3E%3CLI%3ESo%2C%20this%20IP%20from%20the%20Load%20Balancer%20may%20be%20changed%20without%20any%20notice.%3C%2FLI%3E%3CBR%20%2F%3E%3C%2FUL%3E%3CBR%20%2F%3E%20Enjoy!%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20%3CA%20href%3D%22https%3A%2F%2Fmsdnshared.blob.core.windows.net%2Fmedia%2F2019%2F01%2FwithIP.png%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3E%20%3C%2FA%3E%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%20%3CBR%20%2F%3E%3C%2FLINGO-BODY%3E%3CLINGO-TEASER%20id%3D%22lingo-teaser-369162%22%20slang%3D%22en-US%22%3EFirst%20published%20on%20MSDN%20on%20Jan%2016%2C%202019%20Hello%20Team%2CTime%20Ago%20I%20worked%20in%20a%20service%20request%20that%20our%20customer%20reported%20that%20their%20outbound%20IP%20has%20changed%20without%20any%20notice.%3C%2FLINGO-TEASER%3E%3CLINGO-LABS%20id%3D%22lingo-labs-369162%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EAzure%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3Eip%20changed%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ELoad%20Balancer%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESQL%20Database%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EVirtual%20Machine%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
First published on MSDN on Jan 16, 2019
Hello Team,

Time Ago I worked in a service request that our customer reported that their outbound IP has changed without any notice. Working on this issue I have found an interested situation to identify IP of the load balancer of a virtual machine running on Azure.

I created two virtual machines using the same VNet.

The first machine has the Public IP:



The second machine has not a Public IP:



When I try to connect to my Azure SQL Database server xxxx.database.windows.net I have found the following scenarios:

Enjoy!