How do I use "Why Can't I Connect?"
Open a range of limited capacity servers. The servers will try to accept a connection and get the peer IP address and port, it will not try to maintain the connection. Traces will be written for ports that fail to open (the port is possibly in use by another server.) Once open, the server will report any attempt to connect. It will include the peer IP address and port if possible.
Enter the starting port and total ports to open. The maximum number of ports is 1000 in Unix / Linux operating systems, 10,000 in Windows operating systems. The 'Show Trace Message Boxes' check box is a convenience for turning off trace message boxes during Multiple Server sessions (there may be many errors.)
Release 1.12.0
In this release
1. Added SSL / TLS support for IMAP, POP3, SMTP, LDAP, Usenet, and Generic Client connections.
2. Added a trace showing the SSL / TLS certificate information after a connection.
3. Fixed a bug when connecting a Generic Client that expects a response.
Warning: this application links to the openssl libraries. Do not download this application if this is illegal in your country.
The SSL / TLS certificate information trace shows the valid date range and subject information if the trace detail level is set to Medium. The trace additionally shows the issuer information if the trace detail level is set to High.