How to Use Telnet to Test a Specific Port? – Its Linux FOSS
ERROR: "The test connection failed because of the following error: Error establishing socket to host and port, Reason: Connection Refused" in CDI oracle connection
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ERROR: "The connection test failed because of the following error: Error establishing socket to host and port, Reason: Connection refused" while performing test connection to MySQL through IICS
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Test if a port on a remote system is reachable
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Test if a port on a remote system is reachable
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Test TCP/IP Connectivity Through aspx Page - CodeProject
macOS has a much better tool than telnet for testing remote server connectivity | Igor Kromin
