Kentik

MARCH 13, 2019

For destination-based RTBH, the victim’s destination IP address becomes completely unreachable. The victim can update DNS to point at a different IP address in an attempt to get their application back up. The victim can update DNS to point at a different IP address in an attempt to get their application back up.

IP Address 49

IP Address Port Routers DNS 49

The Network DNA

NOVEMBER 26, 2024

Cisco ASA in a Network Configuring DHCP, AAA, and SSH NDNA-ASA(config)# dhcpd address 10.10.10.3-10.10.10.100 10.10.10.100 inside NDNA-ASA(config)# dhcpd dns 112.110.112.5 NDNA-ASA(config)# dhcpd option 3 ip 10.10.10.1 Cisco ASA in a Network Configuring DHCP, AAA, and SSH NDNA-ASA(config)# dhcpd address 10.10.10.3-10.10.10.100

Firewall 52

Firewall IP Address VPN Port 52

Kentik

APRIL 19, 2023

The CDN and the ISP peers over an IXP, the volume drives port upgrades, and private connections are impossible. Removing traffic from the edge will save money on transit and IXP port fees and lower the risk of congestion. There are more efficient ways of operating DNS resolvers, so are there any workarounds available?

IP Address 52

IP Address DNS Server Network 52

Kentik

NOVEMBER 4, 2018

In addition to basic data like source and destination IP address, port, protocol, etc., We also utilize nom , an excellent Rust parser combinator library, for high-performance decoding of application layer protocols like DHCP, DNS, and HTTP.

IP Address 67

IP Address Protocol TCP DNS 67

Network Engineering

JULY 3, 2021

interface Vlan1 nameif inside security-level 100 ip address 192.168.1.1 interface Vlan2 nameif outside security-level 0 ip address dhcp setroute ! 0: Int: Internal-Data0/0 : address is 30f7.0d7e.96c7, 96c7, irq 11 1: Ext: Ethernet0/0 : address is 30f7.0d7e.96bf, interface Ethernet0/4 ! 255.255.255.0 !

VPN 52

VPN IP Address Encryption TCP 52

Kentik

NOVEMBER 23, 2015

DoS becomes DDoS when the source of the attack is distributed, meaning that the attack comes from more than one unique IP address. According to Akamai’s Q1 2015 State of the Internet report , over 50% of volumetric attacks are IP flood attacks involving a high volume of spoofed packets such as TCP SYN, UDP, or UDP fragments.

IP Address 40

IP Address Port Protocol Internet 40

Kentik

OCTOBER 30, 2017

In Data Explorer, we built a query, using the time range of the incident, with “Full Device” as the group-by dimension, and we filtered the query down to the IP address for gcr.io. Using a Data Explorer query to reveal the DNS queries made by this host, we were able to confirm this suspicion.

Port 40

Port DevOps IP Address Network 40

Kentik

MARCH 28, 2016

Starting with the basic ACLs of the mid 90s, the first flow fields added were IP addresses, ports, and protocol. And then they started wanting to track things that routers and switches couldn’t observe, like URL, DNS query, and application and network performance. More of a good thing.

Protocol 40

Protocol Routers MPLS IP Address 40

Kentik

JULY 28, 2021

Bad hardware (the switch or router port). Packet capture : By strategically locating one or more probes off of mirrored ports on the network, sessions can be monitored, but if the loss occurred in the cloud, we will have no idea where it occurred. Performing a TCP traceroute to IP addresses and host names is just the beginning.

Cloud 116

Cloud TCP Routers Protocol 116

CloudFaire

JANUARY 21, 2025

HTTPS in legitimate traffic and DDoS attacks: 2024 Q4 Layer 3/Layer 4 DDoS attacks The top three most common Layer 3/Layer 4 (network layer) attack vectors were SYN flood (38%), DNS flood attacks (16%), and UDP floods (14%). A malicious actor can spoof the victims IP address as a seeder IP address within Trackers and DHT systems.

IP Address 121

IP Address Network Networking Server 121