Cannot access SQL Server instance located within the network on another client machine for whom I am a local admin

Question

I have two different computers, and I use both to log into the same domain. Neither are servers. They are both client computers belonging to the same network. I am admin on both computers, so I can install \ etc.

On one computer, I install a SQL Server instance TGLT-LOANER09\SQLEXPRESS01 (this is what "Serer name" is shown as, when I log in using SQL Server Management Studio).

Next, I want to go over to my other computer, TGLT-73 which has instance SQL Server instance PCDBI on it.

But instead of logging into my local instance ( TGLT-73\PCDBI ), I want to log into the instance on my other networked computer.

So I try to log in to TGLT-LOANER09\SQLEXPRESS01 ; but I cannot. I get error as shown in this screenshot:

I checked the following, and it seems to be configured correctly:

Answer 1

I am dumping the ticket resolution text so that it might help other folks troubleshoot. The root cause was the bottom 4 steps and link. My company help desk solved the issue.

• was remotely connected in to tglt-73
• connected in to tglt-loaner09
• trying to connect sql database on tglt-loaner09 to tglt-73
• set the allow remote connections to the database
• set tcp port 1433 set udp port 1434 allowed in firewall inbound rules
• set tcp/ip enabled in sql server manager
• attempted to connect via name
• attempted to connect via ip
• getting error
• able to ping laptop
• allowed network discovery on laptop
• set ipall tcp port to 1433 with help from jesse discovered the server browser and server agent services were disabled
• enabled these 3 services
• follow the below article to get most of the settings minus the apexsql tools part at the end

https://knowledgebase.apexsql.com/configure-remote-access-connect-remote-sql-server-instance-apexsql-tools/