High Scalability

AUGUST 22, 2018

In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977), TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999).

TCP 88

TCP Internet DNS Protocol 88

Kentik

SEPTEMBER 20, 2021

Packet loss in TCP connections results in retransmissions which can introduce significant latency. Below is the beginning of a TCP handshake. After the DNS lookup and the ARP, the host reaches out to the IP address of the destination using a SYN in order to open a connection. Router hops introduce the most.

TCP 116

TCP Routers Bandwidth IP Address 116

Kentik

OCTOBER 12, 2021

Some NPM vendors started pairing DNS lookup records with flow data in order to separate business applications from non-business applications hosted on the same IP address. The problem is that many companies have several DNS servers spread out in far-reaching locations, and not all DNS vendors allow access to the logs.

Encryption 84

Encryption DNS IP Address Protocol 84

Heroku

NOVEMBER 21, 2024

Our first thought was that perhaps the legacy router is faster at forwarding requests to the dyno because its underlying TCP client manages connections in a way that plays nicer with the Puma server. ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:28631 ec2:11059 ESTABLISHED tcp 0 0 ip-10-1-87-57.ec2:30717 ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:24630

Routers 59

Routers TCP Server DNS 59

Kentik

MAY 8, 2023

Message integrity and guaranteed delivery with TCP/IP Because IP does not require acknowledgments from endpoints, it does not ensure delivery; therefore, it is considered an unreliable protocol. On the other hand, Transmission Control Protocol (TCP) provides a connection-based, reliable byte stream.

Network 52

Network Networking IP Address TCP 52

Kentik

MAY 2, 2018

During last week’s attack, the attacker was redirecting traffic that belonged to Amazon’s Route 53 DNS servers. Below is a diagram of how this attack worked: Once the attackers have the DNS requests coming to them, they can respond with the IP address of a server they control.

IP Address 49

IP Address DNS UDP port Advertising 49

CATO Networks

JUNE 14, 2023

MAC address in the data link layer of a packet capture Moving up the stack, at the network and transport layers, is a much more granular source of information, the TCP/IP stack. In Figure 3 and Figure 4, we can see a packet capture of a MacBook laptop initiating a TCP connection to a remote server. The post IoT has an identity problem.

IoT 52

IoT TCP Protocol Server 52

CloudFaire

DECEMBER 27, 2024

As a reminder, our 1.1.1.1 & WARP apps have two main functions: send all DNS queries through 1.1.1.1, QUIC is a general-purpose transport protocol and Internet standard that operates on top of UDP (instead of TCP), is encrypted by default, and solves several performance issues that plagued its predecessors.

Protocol 88

Protocol Internet Encryption DNS 88

High Scalability

AUGUST 13, 2018

In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977), TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999).

TCP 46

TCP Internet DNS Protocol 46

Network Engineering

JULY 3, 2021

threat-detection basic-threat threat-detection statistics access-list no threat-detection statistics tcp-intercept webvpn username cisco password 3USUcOPFUiMCO4Jk encrypted ! ftp mode passive pager lines 24 logging asdm informational mtu inside 1500 mtu outside 1500 icmp unreachable rate-limit 1 burst-size 1 asdm image disk0:/asdm-7161.bin

VPN 52

VPN IP Address Encryption TCP 52

Kentik

NOVEMBER 4, 2018

we collect network performance metrics like TCP connection setup latency, retransmitted and out-of-order packet counts, and window size. 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

Confluent

JULY 1, 2019

port 53352 dst 54.191.84.122 port 9092 rank info not available TCP aux info available Connection to ec2-54-191-84-122.us-west-2.compute.amazonaws.com compute.amazonaws.com port 9092 [tcp/XmlIpcRegSvc] succeeded! For these comms, we need to use the internal IP of the EC2 machine (or hostname, if DNS is configured).

Port 101

Port IaaS DNS Network 101

Kentik

DECEMBER 18, 2019

These include SNMP, DNS, RADIUS and streaming telemetry. The real server terminates the connection by replying directly to the customer (so we are not passing both directions of the TCP connection through the load balancing node). BGP routing data is another important data source.

Server 13

Server Topology TCP Network 13

Kentik

MARCH 13, 2019

The victim can update DNS to point at a different IP address in an attempt to get their application back up. However, if the attack is targeting the DNS hostname and not the IP address, the attack will just switch over to the new IP address. The mitigation actually “completes the attack.” Destination Prefix. Source Prefix. IP Protocol.

IP Address 49

IP Address Port Routers DNS 49

Kentik

JUNE 14, 2023

An engineer standing in front of a console today stares at the traffic moving from their on-prem data center up and out to a CASB, receiving DNS responses from a cloud-provided DNS service, and then on through an ephemeral microservices architecture in a public cloud. And this, of course, is just to reach the front end.

WAN 59

WAN Data Centers DNS Internet 59

Kentik

APRIL 24, 2023

And when we find that, we’ll want to see interface errors, DNS response times, TCP retransmissions from container resources, and so on, all in a time series to identify what is causing that latency. Today, when we learn that an application is slow, we need to be able to pinpoint precisely where in the path latency is happening.

Network 52

Network Networking DNS Data Centers 52

The Network DNA

JULY 9, 2024

255.255.255.252 C8000-NDNA(config-if)# no ip redirects C8000-NDNA(config-if)# ip tcp adjust-mss 1360 C8000-NDNA(config-if)# arp timeout 1200 C8000-NDNA(config-if)# exit C8000-NDNA(config)# ip route 0.0.0.0

Routers 52

Routers IP Address MPLS WAN 52

High Scalability

AUGUST 31, 2018

at which point TCP terminates on the floor. They'll love you even more. kellabyte : I’m making fun of GraphQL but I like it so far. QuinnyPig : #SREcon @aaronblohowiak "Once upon a time when the stars were young we had an ELB outage".because because ELBs are incredibly durable right up until "Oh s**t!

Internet 42

Internet DNS TCP DevOps 42

Kentik

MAY 31, 2017

Host or sensor-based network performance metrics such as latency, TCP retransmits, errors, out-of-order packets, etc. DNS log data. With Kentik Detect you can finally get the following data sets in one platform for both hyper-speed queries and streaming anomaly/DDoS detection: Netflow, sFlow, IPFIX. SNMP (device & interface data).

Network 40

Network Networking Engineering TCP 40

Kentik

MARCH 27, 2017

To get an idea of how important effective protection can be, remember that by disabling just one digital dependency — the Dyn DNS service — hackers were recently able to shut down e-commerce for many of the industry’s most visible Web brands. Hackers can shut down Web revenues by disabling just one critical dependency.

Cloud 40

Cloud Internet Bandwidth Network 40

Kentik

NOVEMBER 23, 2015

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

JULY 28, 2021

It isn’t so much that packet loss is a huge problem — TCP and QUIC were engineered in anticipation that lost packets would be inevitable. Latency : Missing packets in connection-oriented protocols such as TCP and QUIC result in lost packets getting resent. UDP vs. TCP. Packet Loss Causes Problems with Cloud Applications.

Cloud 116

Cloud TCP Routers Protocol 116

CloudFaire

DECEMBER 9, 2024

of TCP connections are unexpectedly terminated before any useful data can be exchanged. public DNS resolver from millions of users around the world. of TCP connections are unexpectedly terminated before any useful data can be exchanged. Spain was consistently among the top locations across the measured Internet quality metrics.

Internet 72

Internet Email IP Address TCP 72