Network technologies and trends:

UDP

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September 26, 2016  4:43 AM

Cisco ASA FirePOWER Services and High Availability – Series 2

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Arp, Cisco Firewall, Dynamic Routing, Failover, firewall, NAT, NetFlow, Routing, Syslog, TCP, UDP

The Cisco ASA Appliances offers failover in following states

  • Stateless failover
  • Stateful failover.
By default Cisco ASA Appliance performs stateless failover and in this mode of operation, the Active Unit  does the following

September 24, 2016  6:31 PM

Cisco ASA FirePOWER Services and  High Availability – Series 1

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Arp, Cisco Firewall, Dynamic Routing, Failover, firewall, NAT, Routing, Syslog, TCP, UDP

The Cisco ASA Appliance  with FirePOWER Services is capable of offering high availability using failover and clustering. When it comes to failover , the Cisco ASA supports following types

  • Active/Standby
  • Active/ Active
The Cisco ASA Appliance  with FirePOWER...


February 13, 2016  8:40 AM

How does Palo Alto Networks Firewall examines an UDP Packet to identify an application?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
application, Application firewalls, DNS, firewall, Next Generation Networking, Packets, Palo Alto Networks, UDP

In the below example, a single DNS query packet is trying to query  the domain www.yasirirfan.com. This packet contains all the information needed by a Palo Alto Network Firewalls to identify an app,  by inspecting the below UDP packet it can determine


February 11, 2016  8:14 PM

Cisco ASA Firewalls can be exploited by sending crafted UDP packets

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Cisco ASA, firewall, IPsec, IPsec VPN, LAN, UDP, vulnerabilities

Yesterday I received an email from Cisco Security Advisories about the critical vulnerability related IKE version 1 and IKE version 2 code of ASA Software which could empower an unauthenticated remote attacker to reload or even execute a code remotely on a affected ASA firewall.


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