Network technologies and trends:

Security


February 21, 2018  5:42 AM

Palo Alto Networks releases PAN-OS 8.1 and new hardware firewalls

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Data centers, Decryption, Networks, Palo Alto Networks, risks, Security, SSL, threats

The recent press release from Palo Alto networks comes with a great surprise as they released PAN-OS 8.1 which comes with some great new features and enhancements, also the new hardware they introduced have plenty to offer. With growing threats targeted in form, SSL is always challenging to...

February 5, 2018  10:19 PM

Cisco ASA Firewalls and Cisco FTDs can be – exploited remotely due to “Remote Code Execution and Denial of Service Vulnerability” updates

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Adaptive Security Device Manager, API, ASA, Cisco, Cisco ASA, Cisco Firewall, Code, Denial of Service, DOS, REMOTE, Software, SSL, VPN, vulnerability

In my previous post, I talked about the vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. On January 29,...


February 5, 2018  3:30 AM

How to ace Check Point Certified Security Administrator exam?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
CCSA, certification, Checkpoint, coaching, Exam, Firewalls, NAT, Security, VPN

Recently I was successful in passing Check Point Certified Security Administrator (CCSA) exam and now I am a Check Point Certified Security Administrator. Check Point Certified Security Administrator (CCSA) exam is a pretty straightforward exam which addresses the following topics and one need to...


February 2, 2018  12:40 AM

Cisco ASA Firewalls and Cisco FTDs can be exploited remotely due to “Remote Code Execution and Denial of Service Vulnerability”

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, Cisco, Cisco ASA, Cisco Firewall, Code, Denial of Service, DOS, REMOTE, Software, VPN, vulnerability

According to latest Cisco Security Advisories and Alerts update, Cisco ASA Firewalls, and Cisco FTDs can be exploited remotely provided WebVPN is configured on them. There is a vulnerability...


January 2, 2018  4:48 AM

A review for Cisco Press title “Cisco Firepower Threat Defense (FTD)” by Najmul Rajib

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, CCIE, CCNA, CCNP, Cisco, Cisco Press, DNS, firewall, Security, SSL

The recently released Cisco Press title “Cisco Firepower Threat Defense (FTD)” by Najmul Rajib is a great treat to read as he addresses most of the new concepts...


November 9, 2017  3:23 AM

What is “TCP Spurious Retransmission” ? And why does this occur for the FTP traffic passing through a Cisco ASA Firewall?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, Cisco, Cisco ASA, Filezilla, firewall, FTP, Network security, TCP

Recently we come across an issue where FTP  connection was not established between the client and the FTP server. The connection was passing through the Cisco ASA Firewall. Upon troubleshooting, we discovered 3-way TCP handshake was happening, however, once the login name and password entered to...


April 6, 2017  11:08 AM

Cisco have issues with certain software versions of ASA and Firepower appliances as it drops traffic after 213 days

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, Blog, bug, Cisco, console, Firewalls, HTTPS, Reboot, Security, SSH, vulnerabilities

Cisco released a field notice and also published a  blog about the latest


March 30, 2017  5:19 AM

Cisco ASA VPN troubleshooting  – Decaps but No encaps

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, bug, Cisco ASA, Cisco VPN, firewall, NAT, Palo Alto Networks, Policies, Proxy, Troubleshooting, tunnel, VPN

Recently we observed a strange issue while building a site to site VPN tunnel between a Cisco ASA [9.1( 5) ] and Palo Alto Next Generation firewall.(PAN-OS 7.0.9) It was observed always phase 1 part of tunnel established successfully with peer however phase 2 failed to come up. Always we were...


March 20, 2017  1:17 PM

How to re-image the Cisco Identity Services Engine (ISE) 2.2 on a Cisco SNS appliance from Cisco Integrated Management Controller?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Analytics, application, Cisco, Cisco security, DHCP, end point, End-user, Java, KVM, NAC, Security, Spoofing, threats, vulnerabilities

When it comes to re-imaging the Cisco Identity Services Engine (ISE) 2.2 on a Cisco SNS appliance , one can use the KVM console comes with Cisco Integrated Management Controller. If one wants to re-image the Cisco SNS-3415-K9  appliance  he/she could face huge challenges with the java especially...


March 9, 2017  7:36 AM

What’s new in Cisco Identity Services Engine (ISE) 2.2? – Series 3

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Analytics, application, Cisco, Cisco security, DHCP, end point, End-user, NAC, Security, Spoofing, threats, vulnerabilities

Cisco Identity Services Engine (ISE) 2.2 does offer lots of new features , in this post we will continue with those features which are focusing on stopping and containing the threats. These new features are quite helpful in reducing risk and contain threats by dynamically controlling network...


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