traceroute 보안 CVE-1999-0524 문제 해결하기?

현재 시스템 보안을 공부중입니다.

현재 테스트 서버에 CVE-1999-0524 보안 문제가 있습니다.
세부 내역은 아래에 기술했습니다.
이 문제를 해결하기 위해 IPTABLEs을 설치하여 이것저것 해봤는데 안되더군요.
이 문제를 어떻게 해결해야하는지 궁금합니다.
{{{
traceroute: Traceroute can be used to map network topologies
Additional Information More Information
Route: 10.1.200.1
-> 10.1.200.112
Traceroute is a utility used to determine the path a packet takes between two endpoints. Traceroute does this by sending a series of packets
with particular TTL (Time To Live) values and examining the resulting ICMP replies.
Sometimes, when a packet filter firewall is configured incorrectly, an attacker can traceroute the firewall to gain knowledge of the network
topology inside the firewall. This information may allow an attacker to determine trusted routers and other network information.
Remedy:
Prevent or limit external tracerouting into internal networks using packet filtering.
}}}

http://xforce.iss.net/xforce/xfdb/142