1)Make sure you are able to ping PC1 from Pc2
2)Make sure you are able to ping the CA port with "telnet IP PORT"
3) If you are not able to reach the specific port disable firewall antivirus on PC1 and follow this steps:
Search for Windows Firewall, and click to open it.
Click Advanced Settings on the left.
From the left pane of the resulting window, click Inbound Rules.
In the right pane, find the rules titled File and Printer Sharing** (Echo Request - ICMPv4-In).**
Right-click each rule and choose Enable Rule.

4. map the pc1 IP in the host file of PC2 ( most of the times you need to reebot to update it correctly)
5. in the ca-compose.yaml add --csr.hosts "mappedName" --csr.hosts "localhost" ( the name mapped in step 4)
6. change ca server ip in the the fabric-ca-config.yaml
7. Change the parameters related to the CA host/port in the configparams of the client(PC2)
8. Make sure that you edit the ca-compose.yaml the FIRST time you strart the server, otherwise you need to delete all the ca.cert file and ca.key files