The remote host is missing an update as announced via advisory SSA:2005-255-01.
New dhcpcd packages are available for Slackware 8.1, 9.0, 9.1, 10.0, 10.1, and -current to fix a minor security issue. The dhcpcd daemon can be tricked into reading past the end of the DHCP buffer by a malicious DHCP server, which causes the dhcpcd daemon to crash and results in a denial of service. Of course, a malicious DHCP server could simply give you an IP address that wouldn't work, too, such as 127.0.0.1, but since people have been asking about this issue, here's a fix, and that's the extent of the impact. In other words, very little real impact.