Use -V security_options to specify network-based user authentication.
With this option, the user must log in to NT LAN Manager before running the utility. In this case, if a user specifies the -U option, the user must supply the network user name known to the security mechanism, and any password supplied with the -P option is ignored.
-V can be followed by a security_options string of key-letter options to enable additional security services. The key letters are:
i – to enable data integrity service. This option verifies that data communications have not been modified.
r – to enable data replay detection. This option verifies that data has not been intercepted by an intruder.
q – to enable out-of-sequence detection. This option verifies the order of data communications.
You can specify additional security options by including them immediately following the -V option. For example, to use isql with network-based user authentication, replay detection, and out-of-sequence detection, enter: