The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://people.freebsd.org/~niels/issues/corkscrew-20100821.txt http://www.vuxml.org/freebsd/67a1c3ae-ad69-11df-9be6-0015587e2cc1.html

The following package is affected: corkscrew