udp ports

HowTo: UNIX / Linux Open TCP / UDP Ports

by on September 3, 2010 · 8 comments

How do I open the TCP or UDP ports under UNIX / Linux like operating systems?

{ 8 comments }

Linux Iptables Allow NFS Clients to Access the NFS Server

by on March 5, 2009 · 20 comments

The portmapper assigns each NFS service to a port dynamically at service startup time. How do I allow legitimate NFS clients to access the NFS server using RHEL / Fedora / CentOS Linux 5.x iptables firewall?

{ 20 comments }

Detecting DoS / DDoS Attack on a Windows 2003 / 2008 Server

by on November 21, 2008 · 8 comments

Question: How do I detect a DDOS (Distributed denial of service) / DOS attack on a Windows Server 2003 / 2000 / 2008? Can I use Linux netstat command syntax to detect DDoS attacks?

{ 8 comments }

Linux / UNIX Find Out What Program / Service is Listening on a Specific TCP Port

by on February 20, 2008 · 13 comments

Q. How do I find out which service is listening on a specific port? How do I find out what program is listening on a specific TCP Port?

{ 13 comments }