NETWORK CONFIGURATION
IBM® Lotus® Domino® supports two IBM Lotus Notes ports for Internet servers. The user interface specifies two Notes port names in the NOTES.INI variable SMTPNotesPort. For example,
Making outbound connections with a TCP port bound to an IP address
When a client or a server making outbound connections has a TCP port bound to a specific IP address, using the NOTES.INI setting SMTPNotesPorts= <TCPIPAddress>, the bound port can only make outbound connections of the type of the bound IP Address. For example, if a server binds the Notes Port TCPIP to an IPV4 address and the Notes Port TCPIP6 to an IPV6 address, then port TCPIP can only make outbound connections to IPV4 addresses and port TCPIP6 can only make outbound connections to IPV6 addresses.
In a configuration that includes IPV4 and IPV6 Notes ports bound to IP addresses, the ports listed in the Connection documents must include all TCP ports over which the connection can possibly be made. For example, if you create a Server Connection document from serverA to serverB, and serverB's DNS name can resolve to both an IPV4 address and an IPV6 address, and you want the connection to work over IPV4 or IPV6, you must include both ports in the Connection document.
When an IPv4 or an IPv6 socket is created and used
Use the following set of rules to determine whether to use an IPv4 or IPv6 socket:
On Linux®, if one port binds to the "any" address and IPv6 is enabled, a second port cannot bind to a specific IPv4 or IPv6 address. If this is attempted, an "Address is already in use" error is returned.
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