Here is a short how-to I wrote some (well ,long) time ago for the newcomers to our department. It was written for the PIX , but applies to ASA as well in most cases,see for ASA notes for differences. Usually it starts with client complaining about slow internet, or users …

Update 2022: On modern Check Point systems you don't have to run the script below (which still works) as they come with up-to-date iproute2 network tools. So, to clear all dynamic ARP entries learned on a specific interface, use ip neighbor flush dev interface-name. Yesterday my colleague asked how to …

Cisco starting IOS 12.3 introduced a simple but powerful feature to guard against brute force password guessing attack on remote access. The usual template followed when configuring VTY access is: Configure ACL containing management IPs to be allowed to access the router through VTY (Optional) Restrict VTY access protocol …

Deleting IKE/IPsec security associations of established VPNs is inevitable part of any VPN related debug. The standard tool promoted by Checkpoint (take CCSA,CCSE etc.,) is vpn tu that neveretheless has always had a very annoying bug (feature?) - you can delete ALL VPN tunnels at a time and none …

Tired of typing over and over your username/password when using telnet/ssh ? Here are Expect https://core.tcl-lang.org/expect/index scripts to autologin by Telnet and ssh. Note: Yes, it is not secure to keep you username/password saved somewhere, so know what you do . In my opinion …

It is no fun when in the middle of fw monitor / debug session you get abruptly disconnected on SSH session timeout. Here is how to prevent it in the Checkpoint firewall. The session timeout is defined in cat /etc/bashrc: # By default, log out the user after three minutes of …

UPDATE 2021: While all the below is still correct and works, nowadays, in GAIA we have a telnet client installed by default. Yesterday I saw a strange problem - connection from outside to Exchange in a LAN times out, while in Tracker all connections to port 25 are in green. Strange …

HISTORICAL NOTE Aladdin was an Israeli company known for its security eTokens and mail filtering appliances - eSafe. In 2009 it was bought by Safenet primarily for the token/DRM line, and soon the eSafe appliance was discontinued. Later the Safenet was in turn acquired by Gemalto. You can read about …

These are few Linux find patterns I find useful in a daily work. The ones below were of great help when I had to clean Esafe that had more than 100,000 files in the spool ! So usual shell wild-card expansion didn't work (try to do ls in a folder …