Thursday, 14 June 2012

List Of Checkpoint Ports - Port Used In CheckPoint


TCP Port 256 is used for three important things:
  • Exchange of CA and DH keys in FWZ and SKIP encryption between two FireWall-1 Management Consoles
  • SecuRemote build 4005 and earlier uses this port to fetch the network topology and encryption keys from a FireWall-1 Management Console
  • When instaling a policy, the management console uses this port to push the policy to the remote firewall.
TCP Port 257 (FW1_log) is used for logging purposes.

Checkpoint : SPLAT - Disable CD/DVD Rom | Disable CD/DVD Rom From SPLAT (Checkpoint Secure-Platform)


How to disable the "CD/DVD ROM" from "CLI"


FW [Admin]# cd /lib/modules/2.6.18-92cp/kernel/drivers/cdrom

FW [Admin]# mv cdrom.ko cdrom.ko.orig

FW [Admin]# Reboot

or

FW [Admin]# modprobe -r sr_mod

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Wednesday, 13 June 2012

How to Configure VLANs on a Cisco Switch (All Series)



This post will deal with configuring Layer 2 VLANs on Cisco switches. Up to 4094 VLANs can be configured on Cisco catalyst switches. By default, only VLAN 1 is configured on the switch, so if you connect hosts on an out-of-the-box switch they all belong to the same Layer 2 broadcast domain.
The need to configure several Layer 2 VLANs on a switch arises from the need to segment an internal Local Area Network (LAN) into different IP subnetworks. If you want for example to separate the different departments of your enterprise into different IP subnetworks, then each department should belong to its own Layer 2 VLAN.

Tuesday, 12 June 2012

How to fix / repair a dead flash drive (or USB key)


One of my flash drives suddenly died today. It all happened when XP suddenly froze for some reason. after rebooting, the device was dead - XPdetected it as a 0mb device (and attempted to format it as such - which didn’t work).

Installation and Configuration of Linux DHCP Server




For a cable modem or a DSL connection, the service provider dynamically assigns the IP address to your PC. When you install a DSL or a home cable router between your home network and your modem, your PC will get its IP address from the home router during boot up. A Linux system can be set up as a DHCP server and used in place of the router.

OSPF - LSA Types ( 5 Types)



OSPF - LSA Types:

Type 1 - Sent by routers within the Area, including the list of directly attached links. Does not cross the ABR or ASBR.