https://github.com/net4people/bbs/issues/295 China for example ?
It's just few IPs on a known port. It's trivial to block.
now if the cloud providers ran it on every of their internet facing load balancers so you could use any of their IPs for DNS maybe it would be more effective, but as it is, it is entirely trivial to block it.
We actually did it for corporate network for entirely different reason, we just have a bunch of internal-only DNS zones and want browser to use that.
In Eight Bits of Trust: eMudhra's CA keys cracked in millisecondsnet4people
bbs
Python2021–2026
net4people / bbs
bbs
Forum for discussing Internet censorship circumvention
33Distinct people
37Mentions
0Explicit recommenders
5.4KGitHub stars
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Forum for discussing Internet censorship circumvention
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Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
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Mentions over time
HN mentions by year37 dated mentions
Observed mentions: 2021-02-05 00:37:11 UTC to 2026-10-23 01:00:47 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
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| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 6 | 2 | 4 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 4 | 2 | 2 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 5 | 1 | 4 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 7 | 4 | 3 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 11 | 2 | 9 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 4 | 1 | 3 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
BBS
Net4People BBS
The BBS is an inclusive and multilingual forum for public discussion about Internet censorship circumvention. It is a place for developers and researchers to discuss and share information, techniques, and research. Feel free to write in your own language; we will translate. To start a discussion topic, open a new issue.
Net4People论坛
本BBS是一个包容的多语种论坛，用于公开讨论规避互联网审查的话题。欢迎各位开发者和研究人员讨论和分享有关互联网封锁的信息、技术及研究。欢迎你使用自己的语言，我们会翻译的。要发起一个讨论话题，请创建一个新的issue。
Net4People BBS
El BBS es un servicio inclusivo y multilingüe para la discusión pública acerca de las formas de elusión de la censura en Internet. Es un espacio para que desarrolladores e investigadores conversen y compartan información, técnicas y resultados. Si prefieres, escribe en tu propio idioma y lo trataremos de traducir. Para iniciar un nuevo tema de discusión, por favor crea una nueva "issue".
Net4People serwis BBS
Ten BBS jest otwartym i wielojęzycznym forum dla publicznej dyskusji na temat obchodzenia cenzury Internetowej. To miejsce, gdzie programiści i badacze mogą rozmawiać i dzielić informacje, sposoby, i wyniki badawcze. Jeśli wolisz, proszę pisz po swoim języku, a przetłumaczymy. Aby rozpocząć temat dyskusyjny, proszę otwórz nowy issue.
Net4People BBS
Das BBS ist ein inklusives und vielsprachiges Forum für öffentliche Diskussion um Internetzensur und Zensurumgehung. Es ist ein Ort für Entwickler und Forscher, um Informationen, Techniken und Forschung zu teilen. Schreibe gerne in deiner Sprache; wir werden übersetzen. Um eine Diskussion zu starten, starte ein "issue".
انجمن Net4People
BBS یک انجمن فراگیر و چند زبانه برای بحث و گفتگوی عمومی در مورد دور زدن سانسور اینترنت است. این مکانی برای توسعه دهندگان و محققان است تا بحث کنند و اطلاعات، فنون و تحقیقات را به اشتراک بگذارند. با خیال راحت به زبان خود بنویسید؛ ما ترجمه خواهیم کرد. برای شروع یک موضوع بحث، یک مسئله ی جدید ایجاد کنید.
Net4People BBS
O BBS é um forum inclusivo e multilíngue para discussão pública sobre como se evadir da censura na Internet. É um lugar para desenvolvedores e pesquisadores discutirem e compartilharem informações, técnicas e pesquisas. Sinta-se à vontade para escrever em seu próprio idioma, pois nós traduziremos. Para iniciar um tópico de discussão, abra um novo problema.
Net4People BBS
BBS adalah forum inklusif dan multibahasa untuk diskusi publik tentang pengelakan sensor internet. Forum ini merupakan tempat bagi para pengembang dan peneliti untuk berdiskusi dan berbagi informasi, teknik, dan penelitian. Jangan ragu untuk menulis dalam bahasamu sendiri; kami akan menerjemahkannya. Untuk memulai topik diskusi, buka isu baru.
Net4People ဘီဘီအက်စ်
ဘီဘီအက်စ်ဆိုသည်မှာ အင်တာနက်ဆင်ဆာပိတ်ဆို့မှုများအား ကျော်ဖြတ်ခြင်းအတွက် ဆွေးနွေးနိုင်သည့် ဖိုရမ်တစ်ခုဖြစ်ပါသည်။ သုတေသီတွေနဲ့ ဒီဗလိုပါတွေ သတင်းအချက်အလက်၊ နည်းစနစ်နဲ့ စာတမ်းတွေ မျှဝေနိုင်
သည့်နေရာတစ်ခုလည်းဖြစ်ပါသည်။သင်နားလည်တဲ့ ဘာသာစကားနဲ့ဝင်ရောက်ဆွေးနွေးနိုင်ပါသည်။ ကျွန်ုပ်တို့မှ ဘာသာပြန်ပေးပါမည်။
အောက်က လင့်ကို နှိပ်ပြီးဆွေးနွေးမှုတစ်ခုစတင်နိုင်ပါသည်။
open a new issue
منتدى Net4People
هَذَا الْمُنْتَدَى مَسَّاحَةٌ شَامِلَةٌ وَمُتَعَدِّدَةُ اللُّغَاتِ لِلنِّقَاشِ الْعَامِّ حَوْلَ تَجَاوُزِ رَقَابَةِ الإنترنت. يُمْكِنُ لِلْمُطَوِّرِينَ وَالْبَاحِثِينَ مُنَاقَشَةُ وَمُشَارَكَةُ الْمَعْلُومَاتِ، وَالتِّقْنِيَّاتِ، وَالْأَبْحَاثِ هُنَا. لَا تَتَرَدَّدْ/ي فِي الْكُتَّابَةِ بَلَغَتِك؛ سَنَقُومُ بِالتَّرْجَمَةِ. لِفَتْحِ نِقَاشِ جَديدٍ، اِفْتَحْ/ي مُشَكَّلَةَ جَديدَةٍ.
Net4People BBS (Net4People 게시판)
BBS는 인터넷 검열 우회 방안에 관한 공개 토론을 위한 포용적이고 다국어 지원 포럼입니다.
개발자와 연구자들이 정보, 기술, 연구 결과를 논의하고 공유하는 공간입니다.
자유롭게 본인의 언어로 글을 작성해 주세요, 저희가 번역해 드립니다.
토론 주제를 시작하려면 여기서 새 이슈를 생성해 주세요.
Net4People BBS
BBS est un forum inclusif et multilingue de discussion publique sur le contournement de la censure sur Internet.
C'est un lieu où les développeurs et les chercheurs peuvent discuter et partager leurs informations, leurs techniques et leurs recherches.
N'hésitez pas à écrire dans votre langue natale; nous traduirons.
Pour lancer une discussion, ouvrez un nouveau sujet.
Archives of this forum, made using the backup.py script. To make your own backup, create a personal access token and run:
./backup.py -u username:token net4people/bbs net4people_bbs.sqlite3
Read the full README on GitHubWhat Hacker News says
37 sourcesXray-core concealed a certificate verification bypass vulnerability
89 points · Open discussionNO.
They can do unconditional blocking at any moment and suddenly you can experience Internet blackout. [1]
The censorship from GFW is ever evolving. See the endless cat-and-mouse games yourself. [2][3]
[1] https://github.com/net4people/bbs/issues/511
[2] https://github.com/net4people/bbs/issues?q=is%3Aissue+state%...
[3] https://gfw.report/en/
In Iran's internet blackout may become permanent, with access for elites onlyThere is a dedicated thread of record and anti-censorship resources of the Iran Network Shutdown [1]. Hope it helps.
[1] https://github.com/net4people/bbs/issues/561
In From stealth blackout to whitelisting: Inside the Iranian shutdown> Wireguard literally just works
https://github.com/net4people/bbs/issues/558
In Staying ahead of censors in 2025> every single person I know has and actively uses a VPN
I do know people who use no circumvention methods: some are simply not sufficiently familiar with technologies (including older people, who seem to think that something is wrong with their phones), for others it is a mix of regular shying away from technologies and being worried that it draws the government's attention. And then there are those who appear to genuinely support the censorship (or whatever else the government does). I also hear of people switching to local services as the regular ones are blocked.
Anecdotal data is of little use to determine the extent though, and trustworthy statistical data may be hard to come by, but if you somewhat trust the Levada Center, their polls indicate that YouTube's Russian audience halved following the blocking, among other things. [0]
>
Read the rest
WireGuard also works just fine - I was able to selfhost and use it without any extra obfuscation.
For both IPsec and WireGuard, I have both heard of the blocks [1] and observed those myself, particularly to servers across the border (which were otherwise available; there is a chance that I misconfigured something back then, but I recall it working fine with local servers). For IPsec, I have also observed blocks within the country (and RKN lifting those on request, confirming an intentional blocking that way, twice; also confirmed that those were for IPsec packets in particular, not any UDP). But possibly it does not affect all the foreign subnets: as with a recent blackout [2], when quite a few were affected, but not all of them.
[0] https://www.levada.ru/2025/04/24/polzovanie-internetom-sotsi...
[1] One of the recently seen public mentions is at https://blog.nommy.moe/blog/exotic-mesh-vpn/
[2] https://github.com/net4people/bbs/issues/490
Interesting, a apparent GFW insider (GFW官方代表) making a statement on the leak and its source:
https://github.com/net4people/bbs/issues/519#issuecomment-33...
In Geedge and MESA leak: Analyzing the great firewall’s largest document leakLeak of Geedge Networks internal documents
4 points · Open discussionSome analysis and discussion here:
https://github.com/net4people/bbs/issues/519
> After its founding in 2018, one of Geedge's first clients was the government of Kazakhstan, to whom the company sold its flagship Tiangou Secure Gateway (TSG), which provides functions similar to China's own Great Firewall, monitoring and filtering all web traffic that passes through it, as well as attempts to bypass such censorship.
> The same tool has been rolled out in Ethiopia and Myanmar, where it has been instrumental in enabling that country's military junta to enforce a ban on VPNs. In many cases, Geedge works with other private companies, including internet service providers (ISPs) such as Safaricom in Ethiopia, or Frontiir and Ooredoo in Myanmar, to enact government censorship, the documents show. No ISPs that have partnered with Geedge responded t
Read the rest
o a request for comment.
> The leaks show employees at the company working to reverse-engineer many popular tools and find means of blocking them. One set of documents lists nine commercial VPNs as "resolved," and provides various means of identifying and filtering traffic to them. Similar capabilities have long been demonstrated by the Great Firewall, with most commercial VPNs inaccessible from within China and many dedicated anti-censorship tools also hard to access.
> At least one Jira support ticket shows evidence of plaintext capture of email
China has blocked ESNI
https://gfw.report/blog/gfw_esni_blocking/en/
But SNI is not CH and ESNI is not ECH
Will China block ECH
ECH blocking has been detected in Russia
https://github.com/net4people/bbs/issues/417
According to Niere et al. (2025)
"Additionally, with the ECH extension not yet being widely used [17], [71] and focusing on privacy protection rather than censorship circumvention [60], it can be censored easily by blocking it entirely [14], [76]."
The paper describes various GFW bypass methods that currently work, including removing the SNI extension entirely
It does not mention anyone using ECH to bypass GFW
Perhaps it is too early to conclude "China blocks ECH" because ECH is not in widespread use
In Ask HN: The government of my country blocked VPN access. What should I use?If VPNs don't work for you, I recommend using an anti-censorship tool with an obfuscation protocol like v2ray which is commonly used in China.
https://github.com/v2fly/v2ray-core
https://github.com/XTLS/Xray-core
https://github.com/net4people/bbs
https://en.wikipedia.org/wiki/Great_Firewall
In Ask HN: The government of my country blocked VPN access. What should I use?Go here. https://github.com/net4people/bbs/issues
Very helpful community.
In Ask HN: The government of my country blocked VPN access. What should I use?Analysis of the GFW's Unconditional Port 443 Block on August 20, 2025
3 points · Open discussionhttps://abrahamjuliot.github.io/creepjs/
https://github.com/abrahamjuliot/creepjs
Usually my go to. The readme, source code and GitHub issues are great source of information, and the website itself is useful to test against.
edit:
For anything network fingerprinting related, especially censorship related I usually browse https://github.com/net4people/bbs/issues
In A short history of web bots and bot detection techniquesThe post implies that ISPs are doing the throttling — but in fact, ISPs have little control over it lately.
This kind of tampering is mostly done on TSPU devices (Technical Measures for Threat Counteraction), which is fully controlled by Roskomnadzor.
ISPs have little control over it — the system is highly centralized, and Roskomnadzor can carry out sophisticated and targeted actions.
For example, they're able to swiftly block some services and networks in specific regions and/or on specific types of connections (cellular vs wired, or even exact ISPs), or to perform
For example, when YouTube blocking first began, TSPUs were only throttling it on wired networks. This created an unfair advantage for cellular ISPs, prompting many people to cancel their wired internet contracts and switch to mobile networks.
Since there were no legal grounds
Read the rest
for the block, and the government even denied the blocks, trying to blame the throttling on Google, some ISPs just started circumventing the blocks, effectively counteracting the TSPU blocks.
They soon had to stop doing that because of warrants and threats from Roskomnadzor — but it clearly illustrates that ISPs have virtually no control over internet blocking — in either technical or legal terms.
As for Cloudflare specifically — there’s more to the story, and I’m disappointed the post didn’t include more details.
Roskomnadzor is blocking TLS 1.3 ECH — and they are doing it for Cloudflare specifically, forcing Cloudflare users to disable ECH on their domains if they want their websites to be accessible in Russia when using up-to-date browsers.
This also means that, for the website using Cloudflare to be accessible, it needs plaintext SNI. Cloudflare also does not allow domain fronting.
This has allowed Roskomnadzor to implement selective allowlist-based blocking on Cloudflare networks, which is a new step in Russian internet censorship.
It feels like Cloudflare could've done a more in-depth analysis of selective blockings, since they probably can see whether there are statistically noticeable differences in metrics for different domains.
References (some are in Russian):
On some regions having some services like Telegram blocked for months:
- https://ntc.party/t/в-дагестане-отключили-зарубежный-интерне...
- https://www.forbes.ru/tekhnologii/532303-v-dagestane-i-cecne...
- https://www.vedomosti.ru/technology/articles/2025/05/31/1114...
On ISPs getting threats from Roskomnadzor for un-throttling YouTube:
- https://www.cnews.ru/news/top/2024-08-29_mgnovennaya_reaktsi...
- https://www.forbes.ru/tekhnologii/520476-uskorausim-youtube-...
On cloudflare-ech being blocked (since November 2024):
- https://github.com/net4people/bbs/issues/417
- https://ntc.party/t/обсуждение-блокировка-замедление-ech-clo...
on allowlists:
- https://ntc.party/t/09062025-информация-по-блокировке-cloudf...
- https://ntc.party/t/белые-списки/16717/10
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