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	<title>IPv4 &#8211; Noise</title>
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	<link>https://noise.getoto.net</link>
	<description>The collective thoughts of the interwebz</description>
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		<title>DIY BYOIP: a new way to Bring Your Own IP prefixes to Cloudflare</title>
		<link>https://noise.getoto.net/2025/11/07/diy-byoip-a-new-way-to-bring-your-own-ip-prefixes-to-cloudflare/</link>
		
		<dc:creator><![CDATA[Ash Pallarito]]></dc:creator>
		<pubDate>Fri, 07 Nov 2025 14:00:00 +0000</pubDate>
				<category><![CDATA[Addressing]]></category>
		<category><![CDATA[Aegis]]></category>
		<category><![CDATA[BYOIP]]></category>
		<category><![CDATA[CDN]]></category>
		<category><![CDATA[Cloudflare Gateway]]></category>
		<category><![CDATA[Egress]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[ipv6]]></category>
		<category><![CDATA[Magic Transit]]></category>
		<category><![CDATA[RPKI]]></category>
		<category><![CDATA[Smart Shield]]></category>
		<category><![CDATA[Spectrum]]></category>
		<category><![CDATA[апи]]></category>
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					<description><![CDATA[Announcing a new self-serve API for Bring Your Own IP (BYOIP), giving customers unprecedented control and flexibility to onboard, manage, and use their own IP prefixes with Cloudflare's services.]]></description>
		
		
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		<title>One IP address, many users: detecting CGNAT to reduce collateral effects</title>
		<link>https://noise.getoto.net/2025/10/29/one-ip-address-many-users-detecting-cgnat-to-reduce-collateral-effects/</link>
		
		<dc:creator><![CDATA[Vasilis Giotsas]]></dc:creator>
		<pubDate>Wed, 29 Oct 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[Better Internet]]></category>
		<category><![CDATA[bots]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[Network Services]]></category>
		<category><![CDATA[research]]></category>
		<category><![CDATA[security]]></category>
		<category><![CDATA[waf]]></category>
		<category><![CDATA[web application firewall]]></category>
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					<description><![CDATA[IPv4 scarcity drives widespread use of Carrier-Grade Network Address Translation, a practice in ISPs and mobile networks that places many users behind each IP address, along with their collected activity and volumes of traffic. We introduce the method we’ve developed to detect large-scale IP sharing globally and mitigate the issues that result.]]></description>
		
		
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		<title>A deep dive into BPF LPM trie performance and optimization</title>
		<link>https://noise.getoto.net/2025/10/21/a-deep-dive-into-bpf-lpm-trie-performance-and-optimization/</link>
		
		<dc:creator><![CDATA[Matt Fleming]]></dc:creator>
		<pubDate>Tue, 21 Oct 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[deep dive]]></category>
		<category><![CDATA[eBPF]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[ipv6]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[Performance]]></category>
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					<description><![CDATA[This post explores the performance of BPF LPM tries, a critical data structure used for IP matching.]]></description>
		
		
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		<title>Cloudflare 1.1.1.1 Incident on July 14, 2025</title>
		<link>https://noise.getoto.net/2025/07/15/cloudflare-1-1-1-1-incident-on-july-14-2025/</link>
		
		<dc:creator><![CDATA[Ash Pallarito]]></dc:creator>
		<pubDate>Tue, 15 Jul 2025 15:05:00 +0000</pubDate>
				<category><![CDATA[1.1.1.1]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[Outage]]></category>
		<category><![CDATA[warp]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=6979b33d83b2c3990c26a3cac11b9564</guid>

					<description><![CDATA[July 14th, 2025, Cloudflare made a change to our service topologies that caused an outage for 1.1.1.1 on the edge, causing downtime for 62 minutes for customers using the 1.1.1.1 public DNS Resolver.]]></description>
		
		
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		<title>Your IPs, your rules: enabling more efficient address space usage</title>
		<link>https://noise.getoto.net/2025/05/19/your-ips-your-rules-enabling-more-efficient-address-space-usage/</link>
		
		<dc:creator><![CDATA[Mark Rodgers]]></dc:creator>
		<pubDate>Mon, 19 May 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[Addressing]]></category>
		<category><![CDATA[BYOIP]]></category>
		<category><![CDATA[CDN]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[Magic Transit]]></category>
		<category><![CDATA[Spectrum]]></category>
		<category><![CDATA[апи]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=680a08029e5c603a0805d22be4056363</guid>

					<description><![CDATA[IPv4 is expensive, and moving network resources around is hard. Previously, when customers wanted to use multiple Cloudflare services, they had to bring a new address range.]]></description>
		
		
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		<title>Simplify allowlist management and lock down origin access with Cloudflare Aegis</title>
		<link>https://noise.getoto.net/2025/03/20/simplify-allowlist-management-and-lock-down-origin-access-with-cloudflare-aegis/</link>
		
		<dc:creator><![CDATA[Mia Malden]]></dc:creator>
		<pubDate>Thu, 20 Mar 2025 13:00:00 +0000</pubDate>
				<category><![CDATA[Aegis]]></category>
		<category><![CDATA[Egress]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[ipv6]]></category>
		<category><![CDATA[Security Week]]></category>
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					<description><![CDATA[Cloudflare Aegis provides dedicated egress IPs for Zero Trust origin access strategies, now supporting BYOIP and customer-facing configurability, with observability of Aegis IP utilization soon.]]></description>
		
		
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		<item>
		<title>Cloudflare incident on September 17, 2024</title>
		<link>https://noise.getoto.net/2024/09/20/cloudflare-incident-on-september-17-2024/</link>
		
		<dc:creator><![CDATA[Joe Abley]]></dc:creator>
		<pubDate>Fri, 20 Sep 2024 14:00:00 +0000</pubDate>
				<category><![CDATA[Без категория]]></category>
		<category><![CDATA[CDN]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[Outage]]></category>
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					<description><![CDATA[On September 17, 2024, during planned routine maintenance, Cloudflare stopped announcing 15 IPv4 prefixes, affecting some Business plan websites for approximately one hour. During this time, IPv4 traffic for these customers would not have reached Cloudflare and users attempting to connect to websites using addresses within those prefixes would have received errors.]]></description>
		
		
		
			</item>
		<item>
		<title>connect() &#8211; why are you so slow?</title>
		<link>https://noise.getoto.net/2024/02/08/connect-why-are-you-so-slow/</link>
		
		<dc:creator><![CDATA[Frederick Lawler http://blog.cloudflare.com/author/frederick/]]></dc:creator>
		<pubDate>Thu, 08 Feb 2024 14:00:27 +0000</pubDate>
				<category><![CDATA[deep dive]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[ipv6]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[Network]]></category>
		<category><![CDATA[Performance]]></category>
		<category><![CDATA[protocols]]></category>
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					<description><![CDATA[This is our story of what we learned about the connect() implementation for TCP in Linux. Both its strong and weak points. How connect() latency changes under pressure, and how to open connection so that the syscall latency is deterministic and time-bound]]></description>
		
		
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			</item>
		<item>
		<title>Amazon’s $2bn IPv4 tax — and how you can avoid paying it</title>
		<link>https://noise.getoto.net/2023/09/26/amazons-2bn-ipv4-tax-and-how-you-can-avoid-paying-it/</link>
		
		<dc:creator><![CDATA[Anie Jacob]]></dc:creator>
		<pubDate>Tue, 26 Sep 2023 13:00:24 +0000</pubDate>
				<category><![CDATA[Birthday Week]]></category>
		<category><![CDATA[IPv4]]></category>
		<category><![CDATA[ipv6]]></category>
		<guid isPermaLink="false">http://noise.getoto.net/?guid=33b2009063b42adc81028f6d4e4af7d2</guid>

					<description><![CDATA[In this blog, we’ll explain a little bit more about the technology involved, but most importantly, give you a step-by-step walkthrough of how Cloudflare can help you eliminate the need to pay Amazon for something that they shouldn’t be charging you for in the first place]]></description>
		
		
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