DNS Port Routers 
Kentik
SEPTEMBER 22, 2021
Kentik’s OTT Service Tracking (part of Kentik Service Provider Analytics) combines DNS queries with NetFlow to allow a user to understand exactly how OTT services are being delivered - an invaluable capability when trying to determine what is responsible for the latest traffic surge. OTT Service Tracking. Microsoft Patch Tuesday.
Kentik
JANUARY 24, 2022
Back in the 1990s, NetFlow was introduced on Cisco routers as a means to collect information about IP network traffic as it enters or exits an interface. You can also learn about the protocols in use, the ports being used, the top interfaces, etc. Source port for UDP or TCP, 0 for other protocols. Don’t rely on ports.
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Heroku
NOVEMBER 21, 2024
This week , Heroku made Router 2.0 Throughout the Router 2.0 A small subset of Puma applications would experience increased response times upon enabling the Router 2.0 flag, reflected in customers Heroku dashboards and router logs. flag, reflected in customers Heroku dashboards and router logs. dyno root@router.1019708
Kentik
NOVEMBER 17, 2021
Kentik’s OTT Service Tracking (part of Kentik Service Provider Analytics) combines DNS queries with NetFlow to allow a user to understand exactly how OTT services are being delivered — an invaluable capability when trying to determine what is responsible for the latest traffic surge. OTT Service Tracking. The spice (and traffic) must flow.
Network Engineering
OCTOBER 7, 2015
We have a Cisco 3825 router with an IPSec Remote Access VPN configured to authenticate against a radius server. We changed the radius-server host line in our config accordingly and the router is able to communicate with the new radius server. We're retiring the old server and moving to a new one (Windows Server 2012).
Kentik
MARCH 13, 2019
A common DDoS mitigation technique is Remotely-Triggered Black Hole (RTBH), which requires extensive pre-configuration of discard routes and/or uRPF on all edge routers. The victim can update DNS to point at a different IP address in an attempt to get their application back up. Destination port. Source port. IP Protocol.
The Network DNA
NOVEMBER 26, 2024
10.10.10.100 inside NDNA-ASA(config)# dhcpd dns 112.110.112.5 Basic configurations on Cisco ASA Firewall - Part 2 As a part of the understanding on the basics of Cisco ASA firewalls, these are some of the commands used to configure Cisco ASA firewall in real scenario. NDNA-ASA(config)# dhcpd option 3 ip 10.10.10.1 255.255.255.0 255.255.255.0
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