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[Blog] SRE Report 2023 - Do We Share the Same Thoughts?

[Blog] SRE Report 2023 - Do We Share the Same Thoughts?

What is the essential thing? The "gap" in understanding between the practical staff and the management team.

The SRE report contains trends and anti-patterns that make us pause and reflect every year. For example, last year we found that labor levels had significantly decreased globally. However, despite the large-scale resumption of business this year, labor levels have further declined. This is a paradox, and it is undoubtedly necessary to examine it closely. In this year's report, we conducted a detailed investigation of responses to questions regarding specific opportunities and challenges, categorized by role and rank (e.g., individual contributors and executives), revealing interesting patterns. [Contents (partial)] ■ Value derived from AIOps ■ Recognition of "nothing to blame" ■ Prioritization trends of product suites ■ Impact of mass turnover ■ Communication and collaboration *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

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[Blog] How to Solve the "Maximum Character Limit for SPF"?

[Blog] How to Solve the "Maximum Character Limit for SPF"?

By optimizing DNS records, it becomes possible to enjoy an error-free implementation.

There is a limit of 255 characters for SPF records, and exceeding this limit can corrupt the SPF, potentially leading to authentication failures. If you see the message "SPF exceeds maximum characters limit," it simply means that your DNS's SPF record is longer than the character limit specified in RFC7208. This can be problematic, especially when email delivery heavily relies on SPF compliance. [Contents] ■ Optimize to stay within the length limit of SPF ■ What happens if the SPF character limit is exceeded? ■ Strictly adhere to SPF record limits with PowerSPF *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

  • Other server related
  • Other security
  • Server monitoring and network management tools

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[Blog] What is a DNS SOA Record?

[Blog] What is a DNS SOA Record?

Load balancing through zone transfer! Introduction to its importance, structure, procedures, and more in the blog.

The exact number of active websites continues to change, but on average, 175 new websites are created every minute. This means that 252,000 new websites are born each day. Needless to say, users cannot reach their desired page without entering the URL of the website. This is where the role of the DNS SOA record begins. What DNS records are and their types have already been explained previously. In this article, you will learn what a DNS SOA record is. Please read on to understand its importance, structure, procedures, and more. [Contents (excerpt)] ■ What is a DNS SOA record? ■ Why is an SOA record necessary? ■ What is zone transfer in DNS? ■ How does an SOA record function? *For more details about the blog, you can view it through the related links. Please feel free to contact us for more information.

  • Other security
  • Server monitoring and network management tools

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[Blog] Explanation of Overriding DMARC Policy

[Blog] Explanation of Overriding DMARC Policy

A very important factor in preventing email spoofing and impersonation! Introduction to a blog article.

This article will provide a detailed explanation of what DMARC policy overriding is, how it works, the difference between DMARC policy overriding and DMARC policy failure, and whether DMARC record overriding is legitimate. Please take a moment to read it. 【Contents (Excerpt)】 ■ Explanation of DMARC policy overriding ■ Understanding the DMARC policy overriding mechanism ■ The five values of DMARC policy overriding ■ Is DMARC policy overriding allowed? ■ Should DMARC policy overriding reports be sent? *For more details, you can view the related links. Please feel free to contact us for further information.

  • Other security
  • Server monitoring and network management tools
  • Email/Fax transmission

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How to fix the 550 SPF Check Failed?

How to fix the 550 SPF Check Failed?

Solve it with a few simple steps! Introduction to troubleshooting and more on the blog.

The message "550 SPF Check Failed" is a common error prompt that may occur when the sender's DNS lacks an SPF record, has an invalid record, or is triggered by third-party spam filters. An important point regarding this type of error is that it is usually the sender's responsibility, not the recipient's, and it can be resolved with a few simple steps. 【Contents】 ■ About SPF ■ What is the "550 SPF Check Failed" error? ■ Possible causes of the "550 SPF Check Failed" error ■ Troubleshooting the 550 SPF Check Failed Error *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.*

  • Other security
  • Server monitoring and network management tools
  • Email/Fax transmission

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Relevant laws and regulations <Impersonation emails>

Relevant laws and regulations <Impersonation emails>

Starting with invoices and compliance with PCI DSS 4.0. It is related to phishing emails.

We will introduce the laws and systems related to phishing emails. Under the "Invoice System," it is stated that "when digitizing qualified invoices, it is necessary to implement phishing email countermeasures, similar to the Electronic Bookkeeping Act." The "Revised Electronic Bookkeeping Preservation Act" requires that "when sending invoices or receipts via email, they must be stored as electronic data." For more details, please be sure to read the published catalog. 【Related Laws and Systems】 ■ Invoice System (starting October 1, 2023) ■ Revised Electronic Bookkeeping Preservation Act (mandatory from January 1, 2024) ■ PCI DSS 4.0 compliance (by March 31, 2024) *For more information, please refer to the PDF materials or feel free to contact us.

  • Other security

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[Information] Cloudflare Company and Service Overview

[Information] Cloudflare Company and Service Overview

Providing performance, security, reliability, and insights for anything connected to the internet!

Spelldata is the first agency in Asia and Japan to be certified as a managed service provider by Cloudflare in April 2020. This document includes an overview of Cloudflare, its features, and a summary of performance services. With high technical skills and implementation achievements, we support the introduction of Cloudflare on your site and maximize its performance. [Contents (partial)] ■ About Cloudflare ■ Overview of Cloudflare ■ Global Cloud Network ■ Integrated management of all origin infrastructure at the edge ■ Features of Cloudflare *For more details, please refer to the PDF document or feel free to contact us.

  • Software (middle, driver, security, etc.)

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Cloudflare's TTL

Cloudflare's TTL

Determining the priority of Cloudflare's TTL with a chart! Explained in an easy-to-understand way!

The determination of TTL in Cloudflare is complexly influenced by Cloudflare's Workers, Page Rules, and default caching. The related links explain this determination in a chart. It also provides explanations about "Expires and Cache-Control" and "Public and Private," so please take a look. 【Overview】 ■ For cache expiration, there are the absolute time-specified Expires header and the relative time-specified Cache-Control header. ■ The Cache-Control header can specify either the Public or Private directive to allow or disallow caching by intermediate proxies. *For more details, please refer to the related links page or feel free to contact us.

  • Server monitoring and network management tools
  • Other server related
  • Other security

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Measures against email impersonation and email encryption specifications: What is MTA-STS?

Measures against email impersonation and email encryption specifications: What is MTA-STS?

Complete the encryption of the email delivery route along with SMTPS, POPS, and IMAPS!

On our company website, we introduce measures against spoofing emails and the specifications for email encryption. "MTA-STS" (Mail Transfer Agent Strict Transport Security) is a mechanism that allows email service providers to declare their ability to receive secure SMTP connections via TLS and specify whether to reject delivery to MX hosts that do not provide TLS with a trusted server certificate from the sending SMTP server. In the related links, we provide a detailed introduction to the issues with STARTTLS and the features of MTA-STS. Please take a look. [Contents] ■ Issues with STARTTLS ■ Mechanism of MTA-STS *Detailed information can be viewed from the related links. For more information, please feel free to contact us.

  • Other server related
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  • Server monitoring and network management tools

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[Blog] Why Page Speed is a Factor in Determining Search Rankings

[Blog] Why Page Speed is a Factor in Determining Search Rankings

The search is until the data on the web page is displayed! Would you like to measure the display speed?

Google's emphasis on display speed in determining search rankings can be understood by considering where the "starting and ending points of the experience" are. The display of search results is not the endpoint of the search action; rather, the search action continues until a link is clicked from the list of search results and the actual web page data is displayed. If you are delivering high-value content or providing sufficient information about products and services, yet your search ranking is not improving or is declining, it is likely that your display speed is slow. If you suspect that your display speed may be slow, I highly recommend measuring it at least once. 【Overview】 ■ "The field trip is not over until you get home." ■ The reason Google prioritizes display speed in determining search rankings. ■ Would you like to measure your display speed? *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

  • Other information systems
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  • Other analyses

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[Blog] Types of Websites

[Blog] Types of Websites

Choose from five types according to the desired results and specialize! Introduction to topics such as 'e-commerce sites'.

According to Google's digital marketing evangelist, all websites can be categorized into five types. E-commerce sites aim to increase the number of sales of products or services, while sites focused on lead generation aim to increase the number of inquiry form submissions. There are differences in goals based on the type of website. Unfortunately, it would be great if all five goals could be achieved with a single website, but that is quite difficult. Instead of being greedy and wanting "this and that," let's choose one necessary type of website for the current company and specialize in creating it. By doing so, it will become easier for people to understand, and the skills of the web manager will improve, leading to the development of a better website. *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

  • Other information systems
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[Blog] "Correctness Harassment" and Engineering Ethics

[Blog] "Correctness Harassment" and Engineering Ethics

Training IT engineers is training specialists! If ethics and quality decline, the overall evaluation and trust in the industry will decrease.

In America, IT engineers, as well as other engineers and various professions, cannot enter their jobs without graduating from a specialized department at a university. I believe that the perception of criticism towards beginners' technical mistakes as "correctness harassment" is due to unique circumstances in Japan. When writing any technical article, one would have learned the conventions of technical writing by the time they graduate from an engineering department, and they would likely not make common mistakes typical of beginners. In America, there is a clear classification regarding engineers. [Overview (Partial)] ■ "Correctness Harassment"? ■ What is an Engineer? ■ IEA and the Seoul Agreement ■ What is Engineering? *You can view the detailed content of the blog through the related links. For more information, please feel free to contact us.

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[Blog] Introduction to Web Performance: Tips for Image Tuning

[Blog] Introduction to Web Performance: Tips for Image Tuning

Make images larger, more beautiful, yet lightweight! Introducing image optimization techniques on the blog.

Visual content is essential for modern websites, and even minimalist web design relies on sharp and beautiful images for a complete end-user experience. In recent years, screen sizes have diversified from smartphones to tablets, laptops to desktop PCs, making it important to use high-quality images that can be displayed correctly across various viewports. Images that are blurry or low-resolution can make a website's design look shabby, ultimately having a negative impact on the end-user experience. This article discusses major image optimization techniques. [Overview] ■ How to choose image formats ■ Image compression ■ Using CSS sprites ■ Adjusting image sizes to display sizes *For more details about the blog, please refer to the related links. Feel free to contact us for more information.

  • Other network tools
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[Blog] ICP License Required for Business Targeting China

[Blog] ICP License Required for Business Targeting China

The gradually clarified regulations in China! What has changed with Notice No. 264? Introducing it in the blog.

On November 27, 2017, the Ministry of Industry and Information Technology (MIIT) of the People's Republic of China issued an important notice regarding internet business in China. This is Circular 264. The implementation of this notice will take effect on January 1, 2018. This notice will have a significant impact on websites conducting business online in China, including manufacturing, cross-border e-commerce sites, hotels, and inns. [Overview] ■ What is ICP? ■ What is an ICP License? ■ What has changed with the Cybersecurity Law? ■ What has changed with Circular 264? ■ Measures for Circular 264 ■ Summary *For more detailed information, please refer to the related links. Feel free to contact us for further inquiries.

  • Other information systems
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[Blog] Response times surge due to AWS outage

[Blog] Response times surge due to AWS outage

Quickly detect AWS outages and issue alerts! Reasons to use tools other than vendor monitoring tools.

On August 31 (Tuesday), users in a wide area of the West Coast (US-West-2 region) were affected by a significant spike in response times. Among AWS's critical services, Lambda and Kinesis were impacted. The SRE team is concerned about service level indicators (SLIs) and service level objectives (SLOs), and this practice is essential for the SRE team. However, unlike Google, the founder of SRE, most companies rely on infrastructure and services from other providers like AWS and GCP, as well as multiple CDNs. In other words, it is not only necessary to have SLIs and SLOs for their own applications and services, but they also need to carefully evaluate their providers and vendors. *For more details, you can view the blog through the related link. Please feel free to contact us for more information.*

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