My company ran cybercop on one of my servers and it came out with a TCP Wrappers Check with comments of why TCP wrapper installed ports 21 and 23 are vulnerable - how can I fix it? Thanks for your time and help.

    Requires Free Membership to View

Due to the nature of both Telnet & FTP services, they are sometimes hard to remove or shutdown on the system. TCP wrapper programs are used to control the access to these services by limiting access by Hosts and IP addresses. It works as an IP packet filtering facility and provides more specific control over Network services. It also makes use of the standard syslog facility to track local network use. TCP wrappers provide an Access control mechanism by using two files host.deny and host.allow which you install in /etc. You can download a precompiled copy of tcp_wrappers from

If you are not familiar with the installation, the instructions are available in text format with examples on how to configure host.deny and host.allow files.

Hope this helps. Please write back if you need any more information.

This was first published in September 2002

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: