ByteByteGo

DECEMBER 21, 2024

It is commonly used in verifying the authenticity of a server. MX Record Directs email traffic to the correct mail server. NS (Name Server) Record Specifies the authoritative DNS servers for the domain. These records help direct queries to the correct DNS servers for further lookups.

DNS 130

DNS IP Address Server Email 130

Confluent

JUNE 12, 2019

You could just deploy all those services on your own cloud servers, but it is becoming more and more common to solve infrastructure problems like this using Kubernetes. To follow the tutorial, we’ll need a KSQL server, the Kafka Connect Datagen Connector, and the KSQL CLI. Deploy KSQL into Kubernetes.

Cloud 94

Cloud Port Server Application 94

Network Engineering

JANUARY 16, 2025

I am one of the systems admin/engineers for the servers/services behind the load balancing pools and VIPs defined in the F5. Running tests using the command openssl s_client -connect :443 while using tcpdump to capture the port 443 traffic. I can view the configurations of the VIPs, profiles, pools, certificates, etc.

Port 52

Port Server Engineering Network 52

DoorDash Engineering

MARCH 7, 2023

While most engineering tooling at DoorDash is focused on making safe incremental improvements to existing systems, in part by testing in production (learn more about our end-to-end testing strategy ), this is not always the best approach when launching an entirely new business line. Additionally, some require a paid subscription.

Application 119

Application Port Cloud Engineering 119

CloudFaire

DECEMBER 30, 2024

Internet protocol specifications are instructions designed for engineers to build things. Any reasonably skilled engineer should be able to take a specification and produce a performant, reliable, and secure implementation. Server receives the request HEADERS frame and validates it against RFC 9114 rules.

Protocol 101

Protocol Server Internet TCP 101

Network Engineering

JANUARY 15, 2025

I have a TCP server running on my Ubuntu gateway computer at 10.0.0.1:8080. My Wi-Fi is connected to the gateway's LAN (enp4s0) port, and my modem is in bridge mode and plugged into enp3s0. 8080 [link] , I see the correct traffic returning and logs showing from my server on 8080.

LAN 52

LAN Gateway TCP Port 52

Network Engineering

JANUARY 1, 2025

Objectives Install FreeRADIUS on CentOS(steam 9) to perform Cisco device authentication Perform dot1x authentication on all ports of the switch Perform authentication by connecting a laptop to the switch CentOS(203.230.7.2) - Cisco 2960 Switch(203.230.7.254) - Cisco 2800 Series Router(gig0/0 : 203.230.7.1, 255.255.255.0 255.255.255.0

Port 52

Port Routers Firewall Server 52

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're retiring the old server and moving to a new one (Windows Server 2012). We changed the radius-server host line in our config accordingly and the router is able to communicate with the new radius server.

VPN 52

VPN Port Routers Server 52

Engineering at Meta

AUGUST 5, 2024

The CTSW has deep buffers statically divided over the ports in the chassis. The scheduler does this by learning the position of GPU servers in the logical topology to recommend a rank assignment. The post A RoCE network for distributed AI training at scale appeared first on Engineering at Meta.

Network 132

Network Networking Topology Data Centers 132

Engineering at Meta

DECEMBER 10, 2024

At Facebooks scale, the systems built to support and overcome these challenges require extensive trade-off analyses, focused optimizations, and architecture built to allow our engineers to push for the same user and business outcomes. Tens of thousands of lines of code per layer across Android, iOS, and the server.

Server 74

Server Engineering Data Centers Network 74

Network Engineering

JANUARY 8, 2025

501 Not Implemented Content-Type: text/html Content-Length: 357 Connection: close Date: Thu, 09 Jan 2025 07:44:25 GMT Server: ECLF (lac/55F7) 501 - Not Implemented 501 - Not Implemented </h' I get the expected result when I just run the same request without sock5 with the same header so I can't seem to pinpoint the reason behind it.

Port 52

Port Server Protocol Network 52

Network Engineering

JANUARY 16, 2025

Running tests using the command openssl s_client -connect :443 while using tcpdump to capture the port 443 traffic. When successful, the F5 sends the expected "Server Hello" packet, and the SSL handshake continues to success. Unfortunately I do not have admin access to the F5. The behavior is also inconsistent.

Port 52

Port Server Network Networking 52

Network Engineering

DECEMBER 16, 2015

1 I am trying to PAT 123.123.27.134 port 22 to 192.168.60.20 port 22 object network inside-ssh-host host 192.168.60.20 1 I am trying to PAT 123.123.27.134 port 22 to 192.168.60.20 port 22 object network inside-ssh-host host 192.168.60.20 Stripped for readability. 255.255.255.0 255.255.255.0 192.168.50.1 255.255.255.0

IP Address 52

IP Address Port TCP Server 52

CATO Networks

MARCH 24, 2020

At the beginning of the month, Microsoft released an advisory and security patch for a serious Windows Server Message Block (SMB) vulnerability called the Windows SMBv3 Client/Server Remote Code Execution Vulnerability (AKA Windows SMBv3 RCE or CVE-2020-0796). This would solve the problem for SMB servers but not SMB clients.

SMB 52

SMB Port Server Protocol 52

CATO Networks

AUGUST 18, 2022

Because of this convergence, automated security engines and customized policies benefit from shared context and visibility allowing true single-pass processing and more accurate security verdicts. Catos cloud was built from the ground up to provide converged networking and security globally.

SASE 52

SASE Cloud Port Firewall 52

Netflix Tech Blog

OCTOBER 14, 2024

Symptom Machine Learning engineer Luca Pozzi reported to our Data Platform team that their JupyterLab UI on their workbench becomes slow and unresponsive when running some of their Notebooks. Blame The Network The next theory was that the network between the web browser UI (on the laptop) and the JupyterLab server was slow.

Port 86

Port Server Networking Network 86

CATO Networks

JANUARY 17, 2018

In the light of recent ransomware attack campaigns against Microsoft RDP servers, Cato Research assessed the risk network scanning poses to organizations. In some cases, network scanners will use port scans and in other cases ping sweeps. As for SQL Servers, it seems like the hunt for databases still exists.

Network 52

Network Networking Server Port 52

Network Engineering

AUGUST 27, 2024

I have a GNS3 server deployed in Digtal Ocean. I have deployed a Mikrotik and connected it to the eth0 port on the cloud interface. On GNS3 server, when I run IP address show, I get a bunch of results. I am new to IPv6 world. I feel like I should be able to do this but I am not sure what I am doing wrong.

Advertising 52

Advertising IP Address Port Server 52

How Funky

JULY 16, 2024

There were two features in the IPU that are something infrastructure engineers should know about. In a shared fabric environment, it can be difficult to structure and provision all the access ports with the right queuing and policies. Intel sees the following areas as potential good use cases for their IPU.

Ethernet 52

Ethernet Server Network Interface Engineering 52

Heroku

NOVEMBER 21, 2024

beta, our engineering team has addressed several bugs, all fairly straight-forward with one exception involving Puma -based applications. After thorough router investigation and peeling back Pumas server code, we realized what we had stumbled upon was not actually a Router 2.0 This week , Heroku made Router 2.0 Throughout the Router 2.0

Routers 59

Routers TCP Server DNS 59

Kentik

APRIL 18, 2023

This could encompass packet captures, flow records, server logs, routing advertisements, file access records, etc. We can look at flow records, interface utilization, server logs, and more to see what type of attack we’re experiencing, who it’s affecting, when it started, and so on. However, this is only part of the process.

Data Centers 59

Data Centers WAN Server Engineering 59

CATO Networks

SEPTEMBER 11, 2023

allow users on the corporate VLAN to access printers located in the printer VLAN, over specific TCP ports. CCTV cameras), connected to an IOT-camera VLAN, to access the IOT File Server, but only over HTTPS. allow database synchronization across two VLANs located in separate datacenter rooms over a specific protocol/port.

LAN 52

LAN Cloud Firewall WAN 52

Kentik

JANUARY 13, 2021

Despite your best efforts as a network engineer, network failures happen, and you have to fix them. No network engineer can troubleshoot without being prepared with their tools and telemetry. Ping is a utility that’s available on practically every system, be it a desktop, server, router, or switch. The Network is the Key.

Network 114

Network Networking TCP Protocol 114

Kentik

OCTOBER 2, 2015

It focuses on using PHP to parse the JSON and to write the desired values to a human-readable file on a web server. Kentik Detect customers use alerts to monitor various metrics in the data that is ingested into the Kentik Data Engine (KDE), including information on devices, interfaces, IP/CIDR, Geo, ASN, and ports.

Port 40

Port Protocol Server Bandwidth 40

CATO Networks

APRIL 6, 2023

This enables them to secure traffic directed at datacenter applications and also direct traffic to the right server and applications within the WAN. Secure LAN Access SSE should secure VLAN traffic using access control and threat prevention engines. Which SSE Can Replace the Physical Datacenter Firewalls? Download the White Paper 3.

Firewall 52

Firewall LAN WAN Internet 52

Confluent

JULY 10, 2019

But like most SQL engines, there is often a need to write custom functions to reduce the complexity of certain SQL operations as repeatable design patterns. These two annotations imported from the io.confluent.ksql.function.udf package instruct the KSQL server to provide the method or methods in the class as UDFs. Note: When executing./gradlew

Application 89

Application Server Cloud Port 89

Engineering at Meta

DECEMBER 18, 2024

So, a few years ago, engineers at Meta decided to take roughly ten million lines of perfectly good Java code and rewrite them in Kotlin. Headless J2K: The J2K we know and love, but server-friendly! The post Translating Java to Kotlin at Scale appeared first on Engineering at Meta. But first, null safety!

Port 88

Port Server Engineering 88

CATO Networks

MAY 20, 2024

Figure 2: Distribution of Servers IPs by Number of Shared Domains Refer to Figure 3 for an illustration of a shared hosting IP address hosting both a highly malicious phishing site – ultrasafe.co.in This IP is managed by eWebGuru, a hosting service provider that allocates server resources to various clients.

IP Address 52

IP Address Server Port SMB 52

Kentik

DECEMBER 22, 2016

We really respected their thoroughness and the fact that they are practicing network engineers, so as we’ve come up with cool new gizmos in our product, we’ve asked them to extend their review. Well, as the probe is installed on the server itself, it is privy to information which NetFlow devices are not. Fragments per second and %.

Network 40

Network Networking Server Port 40

Network Engineering

JULY 3, 2021

inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd auto_config outside !

VPN 52

VPN IP Address Encryption TCP 52

Scott's Weblog

JANUARY 10, 2025

Julio Perez has a nice write-up on Codespaces for network engineers and educators. Servers/Hardware Bryan Cantrill shares some thoughts on why Gelsinger was wrong for Intel. ” Cloud Computing/Cloud Management I haven’t personally used mirrord , but this article on port forwarding with mirrord piqued my interest.

Media 49

Media Email Port Education 49

Kentik

DECEMBER 2, 2015

The issue was a new type of “spam reflection” that was causing headaches by allowing spammers to avoid detection while utilizing servers inside the customer’s network as spam sources. Here’s how these types of schemes work: The spammer sends a SYN from a spoofed source IP address to TCP port 25 (SMTP) on the target mail server.

TCP 40

TCP Protocol Port IP Address 40

CATO Networks

FEBRUARY 26, 2020

Today, enterprises must be prepared to address a wide variety of attacks including social engineering attacks, Internet-borne malware, and ransomware across all the different attack vectors that exist within modern networks. Additionally, a Deep Packet Inspection (DPI) engine enables contextualization of traffic.

Network Security 52

Network Security Network Networking UDP port 52

Kentik

SEPTEMBER 20, 2016

It’s up to IT and network engineering groups to address performance, but to do so they need effective ways to measure and monitor. For example, using SNMP or flow data to track traffic volume on interfaces, servers, and devices can provide necessary visibility into possible congestion points. TCP is the key.

Network 40

Network Networking TCP Server 40

Scott's Weblog

AUGUST 16, 2024

Networking Leon Adato has a great piece on transitioning from being a network engineer to being a cloud engineer. Servers/Hardware Permanent damage? Running Oracle Kubernetes Engine (OKE)? The post links to some good resources, and Leon provides three quick “lessons” to help folks get started.

DNS 40

DNS Server Engineering Cloud 40

Kentik

JUNE 27, 2016

The foundation for this work is the network data that is captured and stored by Kentik’s post-Hadoop Big Data backend, Kentik Data Engine™ (KDE), which includes full-resolution flow records (e.g. Advanced Big Data style visualizations returned from these queries make it easy to see where the traffic is going and on which ports.

Network Security 40

Network Security Network Networking Protocol 40

CATO Networks

OCTOBER 18, 2021

The top five observed threat types include: Network Scanning : The attacker is detected testing different ports to see which services are running and potentially exploitable. Regional bans have little or no impact because most malware sources and command & control servers are in the US. #3.

SASE 52

SASE Port Network Networking 52