This article gives an overview which SalesForce ports and adress needs to be set up to establish connection
Salesforce connector uses local Windows machine internet settings to connect to the internet.
When a new connection is configured a test is performed the following will happen:
Is Salesforce reachable?
Are the username and password correct?
When data is to be fetched from Salesforce, the connection usually goes encrypted using SSL. An additional connection is made to verify the authenticity of the SSL certificate.
Is the SSL certificate valid? This request is sent to Verisign.
The following must be taken into consideration by a network administrator when connecting QlikView and Salesforce using the Salesforce connector with a firewall and/or proxy server.
In order to allow a successful communication between the host and Salesforce the following ports/hosts must be allowed in the firewall/proxy:
For security reasons, Salesforce restricts the outbound ports you may specify to one of the following:
Destination port 80: This port only accepts HTTP connections.
Destination port 443: This port only accepts HTTPS connections.
Source port: 1024–66535 (inclusive): These ports accept HTTP or HTTPS connections.