Answer / amsin21

Iptables is the userspace command line program used to
configure the Linux 2.4.x and 2.6.x IPv4 packet filtering
ruleset. Iptables allows administrators to configure the
operating system so that it allows applications and clients
to connect through the network and stop unwanted
applications and clients from communicating and corrupting
the operating system.
It is not specific to Redhat. It is available in all linux
2.4.x and 2.6.x kernels.

Answer / satish malanch

Iptable is packet filtering strong firewall in linux os.

Answer / manoj

Iptable is filtering tool, check point, can create natting
(Source nat & destination nat), Inbound, Outbound Security,
Able block & allow port forwording, block or open a port,
block & allow service for specific domain & for
user,Maintain firewall security as well.

what kind of information the linux driver modules (.ko ) files has ?

2 Answers   NetApp,

---

what happens when we do insmod & rmmod in Linux Device Drivers ?

2 Answers  

---

Port number is already in use .. how to fix for apache..?

1 Answers   Google,

---

how to configure sendmail server on red hat linux version 4 and what and all we Require?

3 Answers   Wipro,

---

What will happen when we invoke a system call and say with an example of invoking a system call ?read? for a device?

3 Answers   NetApp,

---

how to create samba server in fedora linux 9 ?

2 Answers   Accenture,

---

if one of the critical section code (linked list) is under ISR & another one in kernel thread ? How you will synchronize for this critical section code ?

4 Answers   NetApp,

---

if root user forget the password how to change it?

4 Answers   Wipro,

---

how to create a ftp user on redhat linux 4.0?

6 Answers   Accenture,

---

how to configure http server on red hat linux4.0?

5 Answers   IBM,

---

what is sudo on linux?

3 Answers   IBM,

---

diff b/w spinlock, seamaphores and mutex and where to use it.

2 Answers   Intel,

---