XHTTP transport: New options for bypassing CDN's potential detection #5414 & Finalmask: Add XICMP, XDNS (relies on mKCP, like DNSTT), header-*, mkcp-*

为了捍卫通信自由，本次重点更新内容：

1. XHTTP 新增了一些选项，以绕过潜在的 CDN 检测（尚未定型，不建议第三方实现现在跟进），详见 #5414
2. Xray-core HTTP 请求的 User-Agent 均由 Go 改为动态 Chrome（可被 headers 等配置覆写），详见 #5658
3. Finalmask UDP 新增了 XICMP、XDNS、header-*、mkcp-*，分享链接标准 #716 已更新 fm、pcs、vcn
4. Finalmask UDP 支持了 WireGuard、SS AEAD/2022 等代理层协议产生的 UDP 流量，详见 #5643
5. TLS 移除了 allowInsecure 配置项，请使用 pinnedPeerCertSha256 和 verifyPeerCertByName 代替，详见 2c92339
6. 进一步降低了 Xray-core 启动时的瞬时内存占用 #5581 ，对于 iOS/router 请测试 #5505
7. v26.2.6 包含一些 v26.1.23 新增功能的配置项变更、重要修复，请及时升级 Xray-core 以及 GUI 客户端

https://t.me/projectXtls/1464 此外我们将于下个月推出 XDRIVE 传输层与 XICMP 伪装层，前者可利用网盘、S3 stores 等服务传输数据，不需要自有公网 IP，而是通过潜在的白名单 IP 进行代理，或者境外能访问到境内的服务也行

https://t.me/projectXtls/1473 定义已经清晰，“最终伪装层”是最底层的一个“不可靠的传输层”，比如对于 UDP 它只做每个包的伪装而不会确保可靠传输（依赖上层 mKCP/QUIC/WG，或者代理协议就是想要原生 UDP 特性），另一方面它放的那些东西天马行空、不具备抗检测的鲁棒性但可能就是有奇效，比如现在已有的 XICMP、XDNS、header-*、mkcp-*、Salamander，后续还会把 TCP/TLS fragment、UDP noises 移过来，它们都支持分享，以及据称有用的 ASCII、gfw-killer 想要的在 TCP 流开头加自定义数据等，还可能加 MC 等游戏伪装，如果你有天马行空的 idea 也可以提出

分两种情况，一种是只加 header 一种是真的通过那个东西传输数据，第一种会被命名为 header-*，第二种会被命名为 X*，懒得起名了，另外 TCP 的那些伪装可以通过 VLESS fallbacks offload 给别的程序

https://t.me/projectXtls/1478 不在乎主动探测的话其实最简单的方法就是 REALITY 加随便填 SNI，服务端允许的值和客户端填写的值对得上就行，不需要自签再 pin 那么麻烦，且几乎所有客户端都支持 REALITY 及其分享，这不比自签强吗

https://t.me/projectXtls/1490 为了给少数机场一些迁移时间，今天的版本将 allowInsecure 设为了延时自动禁用（UTC 2026.6.1 00:00），请联系你的机场主为 allowInsecure 的订阅配置加上 pcs/vcn，即可同时兼容新旧版本

这和明文 HTTP 面板一样是 *ray 一开始就有的安全设计问题，可以允许自签但从一开始就不该给出完全不验证证书的选项，然后又错误地被越来越多的代理软件学去，GFW 一个主动探测就知道你能被 MITM

毕竟现在的代理已经越来越多地转向 VLESS、Trojan、Hy2 等内层明文、依赖 TLS 层安全的协议，所以在已知 GFW 拥有完备的 MITM 能力且在其它国家进行过大规模尝试后，这个问题必须得到纠正

Sponsors

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Donation & NFTs

Collect a Project X NFT to support the development of Project X!

• TRX(Tron)/USDT/USDC: TNrDh5VSfwd4RPrwsohr6poyNTfFefNYan
• TON: UQApeV-u2gm43aC1uP76xAC1m6vCylstaN1gpfBmre_5IyTH
• BTC: 1JpqcziZZuqv3QQJhZGNGBVdCBrGgkL6cT
• XMR: 4ABHQZ3yJZkBnLoqiKvb3f8eqUnX4iMPb6wdant5ZLGQELctcerceSGEfJnoCk6nnyRZm73wrwSgvZ2WmjYLng6R7sR67nq
• SOL/USDT/USDC: 3x5NuXHzB5APG6vRinPZcsUv5ukWUY1tBGRSJiEJWtZa
• ETH/USDT/USDC: 0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee
• Project X NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1
• VLESS NFT: https://opensea.io/collection/vless
• REALITY NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2
• Related links: VLESS Post-Quantum Encryption, XHTTP: Beyond REALITY, Announcement of NFTs by Project X

该版本升级了一些依赖，并使用 Go 1.25.7 拉满 inline 编译，已 tag v1.260206.0，感谢所有贡献者，详见下方 change log

What's Changed

• TUN inbound: Disable RACK/TLP recovery to fix connection stalls by @KiGamji in #5600
• TUN inbound: Enhance Darwin interface support by @Owersun in #5598
• Hysteria transport: Support range & random for interval in udphop as well by @LjhAUMEM in #5603
• Geodat: Reduce peak memory usage by @Meo597 in #5581
• TUN inbound: Add iOS support by @evozi-team in #5612
• VMess inbound: Optimize replay filter by @Fangliding in #5562
• README.md: Add Egern & Quantumult X to Others by @nasaboy in #5624
• Upgrade gVisor to latest version v0.0.0-20260122175437-89a5d21be8f0 by @RPRX in 9c46a2d
• TLS config: allowInsecure->pinnedPeerCertSha256; verifyPeerCertInNames->verifyPeerCertByName by @RPRX in 2c92339
• Commands: Print leaf cert's SHA256 in tls ping by @Fangliding @RPRX in #5628
• MPH domian matcher: Support building & using cache directly (instead of building from geosite.dat when Xray starts) by @hossinasaadi in #5505
• XHTTP transport: New options for bypassing CDN's potential detection by @paqx @Fangliding in #5414
• Finalmask: Add XDNS (relies on mKCP, like DNSTT), header-*, mkcp-* by @LjhAUMEM in #5560
• XHTTP transport: Fix "auto" mode with REALITY by @paqx in #5638
• Finalmask: Add XICMP (relies on mKCP/QUIC or WireGuard) by @LjhAUMEM in #5633
• Chore: Generate *.pb.go files with protoc v6.33.5 by @RPRX in d14767d
• Commands: Print CA cert's SHA256 in tls ping by @Fangliding in #5644
• Finalmask UDP: Support WireGuard & Shadowsocks AEAD/2022 by @LjhAUMEM in #5643
• Xray-core: Dynamic Chrome User-Agent for all HTTP requests by default (overwriteable through config) by @RPRX @Fangliding in b7a22c7
• TLS client: Simplify cert's verification code by @Fangliding in #5656
• Workflows: Add simple consistency check for *.pb.go files to test.yml by @Fangliding in #5646
• XICMP finalmask: Refine seq by @LjhAUMEM in #5652

New Contributors

• @KiGamji made their first contribution in #5600
• @evozi-team made their first contribution in #5612
• @nasaboy made their first contribution in #5624
• @paqx made their first contribution in #5414

Full Changelog: v26.1.23...v26.2.6

See https://github.com/XTLS/Xray-core/releases/tag/v26.2.6

See https://github.com/XTLS/Xray-core/releases/tag/v26.2.6

See https://github.com/XTLS/Xray-core/releases/tag/v26.2.6

Proxy: Add TUN inbound for Windows & Linux, including Android #5464 #5509 & Proxy: Add Hysteria outbound & transport (version 2, udphop) and Salamander udpmask #5508

新年好！2026 第一版 Xray-core 重点更新内容：

1. 新增 TUN 入站（Windows、Linux、Android、macOS）#5464 ，默认 UDP FullCone 与 XUDP UoT Migration #5509
2. 新增 process 路由规则（Windows、Linux），匹配进程名/绝对路径/文件夹，支持任何入站 #5496
3. 新增 Hysteria 2 出站、Hysteria 2 传输层（支持端口跳跃）、Salamander 伪装层，完整配置示例详见 #5508
4. 新增“最终伪装层”概念 https://t.me/projectXtls/1354 ，比 TLS/QUIC 更底层，下一步计划 #5508 (comment)
5. TLS 客户端使用 pinnedPeerCertSha256 取代原有两项参数 #5154 #5532 760223a ，分享链接标准 #716 已更新 pcs
6. REALITY 客户端收到目标网站的真证书时打印出更加明确的警报（potential MITM or redirection）#5427
7. 为废弃特性/过时协议提醒迁移 cd8aab9 ，创建了 SECURITY.md 1cf5662 以明确安全漏洞/协议识别问题提交途径

为了使用 TUN，配置文件需要以下修改，以 Windows 为例：

1. 配置文件加一个 "tun" 入站，无需 settings，加一个 "direct" 作为默认出站
2. 为所有出站设置 sockopt "interface": "WLAN" 或 "以太网" 防止出站回流 Xray-core
3. 设置 routing 比如 "process": ["NatTypeTester.exe"] 导向代理协议出站
4. 浏览器会有 QUIC，注意设置路由 block UDP/443，或为 sniffing 启用 "quic"

TUN 尚未支持“自动修改系统路由表”，目前需要手动设置：

5. 以管理员权限启动 Xray-core，静置数秒等 Windows 自动为 TUN 分配 IP
6. 执行 ipconfig 与 route print 查看 Xray TUN 的 IPv4 地址与 interface ID
7. 以管理员权限执行 route add 0.0.0.0 mask 0.0.0.0 *.*.*.* if ** 新增系统路由

感谢 @Owersun @yuhan6665 @Fangliding @KobeArthurScofield @RPRX @osypai 为支持 TUN 所作出的贡献！

@Meo597 将 https://xtls.github.io/ 升级至了 VitePress，本次更新内容也会陆续更新至文档中

由于伊朗目前完全断网，致力于内存优化的贡献者 @hossinasaadi 已有半个月没有活动，盼望他早日回归！

Sponsors

Sponsor Xray-core

Donation & NFTs

Collect a Project X NFT to support the development of Project X!

• TRX(Tron)/USDT/USDC: TNrDh5VSfwd4RPrwsohr6poyNTfFefNYan
• TON: UQApeV-u2gm43aC1uP76xAC1m6vCylstaN1gpfBmre_5IyTH
• BTC: 1JpqcziZZuqv3QQJhZGNGBVdCBrGgkL6cT
• XMR: 4ABHQZ3yJZkBnLoqiKvb3f8eqUnX4iMPb6wdant5ZLGQELctcerceSGEfJnoCk6nnyRZm73wrwSgvZ2WmjYLng6R7sR67nq
• SOL/USDT/USDC: 3x5NuXHzB5APG6vRinPZcsUv5ukWUY1tBGRSJiEJWtZa
• ETH/USDT/USDC: 0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee
• Project X NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1
• VLESS NFT: https://opensea.io/collection/vless
• REALITY NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2
• Related links: VLESS Post-Quantum Encryption, XHTTP: Beyond REALITY, Announcement of NFTs by Project X

该版本升级了一些依赖，并使用 Go 1.25.6 拉满 inline 编译，已 tag v1.260123.0，感谢所有贡献者，详见下方 change log

What's Changed

• Chore: Remove all double gonet import by @Fangliding in #5402
• Wireguard: Decouple server endpoint DNS from address option by @Meo597 in #5417
• VLESS inbound: Print invalid UUID string by @xtlsee @RPRX in #5426
• REALITY client: Clearer log when receiving real certificate by @ari-ahm @RPRX in #5427
• TLS ECH: Increase DOH timeout by @patterniha @Fangliding in #5455
• Tunnel/Dokodemo: Fix stats conn unwrap by @Fangliding in #5440
• DomainMatcher: Prevent illegal rules from causing core startup failures by @Meo597 in #5430
• common/uuid: fix panic when parsing 32-len invalid UUID string. by @ari-ahm in #5468
• API: Add GetAllOnlineUsers RPC to StatsService for retrieving online users by @mr1cloud in #5080
• Geofiles: Implement mmap in filesystem to reduce ram usage by @hossinasaadi in #5480
• Remove redundant stats in mux and bridge dispatcher by @yuhan6665 in #5466
• XHTTP server: Fix ScStreamUpServerSecs' non-default value by @fanymagnet in #5486
• Routing config: Add processName by @Fangliding in #5489
• README.md: Re-add 3X-UI to Web Panels by @RPRX in b38a412
• Routing: Reduce peak memory usage by @hossinasaadi in #5488
• DNS: Fix parse domain and geoip by @hossinasaadi in #5499
• README.md: Add TX-UI to Web Panels by @Incognito-Coder in #4981
• transport/pipe/impl.go: Remove runtime.Gosched() in WriteMultiBuffer() by @Fangliding in #5467
• Routing config: Replace processName with process (full-name/abs-path/abs-folder) by @Fangliding in #5496
• GitHub Actions: Add wintun.dll into Windows zips; Workflow refinement by @KobeArthurScofield in #5501
• Proxy: Add TUN inbound for Windows & Linux, including Android by @Owersun @yuhan6665 in #5464
• Tests: Improve geosite & geoip tests by @hossinasaadi in #5502
• TLS config: Add pinnedPeerCertSha256; Remove pinnedPeerCertificateChainSha256 and pinnedPeerCertificatePublicKeySha256 by @Fangliding @RPRX in #5154
• DNS: Check err for UDP dns.PackMessage(req.msg) by @Fangliding in #5512
• TUN inbound: Implement UDP FullCone NAT by @RPRX @Fangliding @Owersun in #5509
• TUN inbound: Fix log, CanSpliceCopy, tag, sniffing, and port config issues by @RPRX in #5522
• TUN inbound: Make udp_fullcone pure side effect free udp connection by @Owersun @RPRX in #5526
• Upgrade gVisor to latest version v0.0.0-20260109181451-4be7c433dae2 by @Owersun in #5527
• Proxy: Add Hysteria outbound & transport (version 2, udphop) and Salamander udpmask by @LjhAUMEM in #5508
• TUN inbound: Close connection when handling is done by @Owersun in #5531
• TLS client: Verify leaf cert (name, time) when pinning self-signed CA by @Fangliding in #5532
• Hysteria: Fix transport's "udphop without salamander" dialing issue; Require "version": 2 in outbound's settings as well by @LjhAUMEM in #5537
• SS2022 outbound: Fix UDP leak by @Fangliding in #5544
• README.md: Add Happ RU to iOS & macOS Clients by @mangustyura in #5551
• Commands: "xray run -dump" supports reading JSON from STDIN by @vrnobody in #5550
• TLS client: Skip TLS' built-in verification when using pinnedPeerCertSha256; Fixes by @RPRX in 760223a
• TLS client: Add pin_test.go for leaf and CA by @Fangliding in #5553
• Geofiles: Revert related changes for now, waiting for better changes by @Fangliding in #5557
• Hysteria transport: Add congestion config (""/"reno"/"bbr"/"brutal"/"force-brutal") by @LjhAUMEM in #5549
• TUN inbound: Add macOS support by @osypai in #5559
• Config: Add Warning for deprecated features (allowInsecure, Shadowsocks, VMess, Trojan, VLESS without flow) by @RPRX in 5836f36
• Hysteria outbound: Fix ContextWithRequireDatagram() by @LjhAUMEM in #5558
• Create SECURITY.md by @RPRX in 1cf5662
• TUN inbound: Cancel ctx when handling is done by @patterniha @RPRX in #5565
• Tests: Reduce RAM usage by @Fangliding in #5577
• README.md: Update links for PassWall & PassWall 2 by @gamekiller0010 in #5572
• Router: Fix panic in ProcessNameMatcher when source IPs are empty by @Fangliding in...

See https://github.com/XTLS/Xray-core/releases/tag/v26.1.23

See https://github.com/XTLS/Xray-core/releases/tag/v26.1.23

XTLS Vision: Add testpre (outbound pre-connect) and testseed (outbound & inbound) #5270

本次重点更新内容：

1. XTLS Vision 加了试验性的“预连接”以消除延迟，开放用户自定义配置最关键的四个 padding 相关参数，详见 #5270
2. 服务端 sockopt 加了 trustedXForwardedFor 以防止 XHTTP、WS、HU 客户端伪造源 IP，详见 #5331
3. VLESS inbound 开了 Reverse Proxy 的 UUID 将默认被拒绝使用正向代理，更加安全，详见 #5101 (comment)
4. @Meo597 对 DNS 和路由模块进行了一些重构、优化、功能新增，详见下方 change log

Sponsors

Sponsor Xray-core

Donation & NFTs

Collect a Project X NFT to support the development of Project X!

• TRX(Tron)/USDT/USDC: TNrDh5VSfwd4RPrwsohr6poyNTfFefNYan
• TON: UQApeV-u2gm43aC1uP76xAC1m6vCylstaN1gpfBmre_5IyTH
• BTC: 1JpqcziZZuqv3QQJhZGNGBVdCBrGgkL6cT
• XMR: 4ABHQZ3yJZkBnLoqiKvb3f8eqUnX4iMPb6wdant5ZLGQELctcerceSGEfJnoCk6nnyRZm73wrwSgvZ2WmjYLng6R7sR67nq
• SOL/USDT/USDC: 3x5NuXHzB5APG6vRinPZcsUv5ukWUY1tBGRSJiEJWtZa
• ETH/USDT/USDC: 0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee
• Project X NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1
• VLESS NFT: https://opensea.io/collection/vless
• REALITY NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2
• Related links: VLESS Post-Quantum Encryption, XHTTP: Beyond REALITY, Announcement of NFTs by Project X

该版本升级了一些依赖，并使用 Go 1.25.5 拉满 inline 编译，已 tag v1.251208.0，感谢所有贡献者，详见下方 change log

What's Changed

• REALITY config: Return error when short id is too long by @Fangliding @RPRX in #5276
• Fix wireguard not discarding broken connection on android by @Exclude0122 in #5304
• README.md: Add Remnawave & Happ to Sponsors by @RPRX in 4e8ee30
• README.md: Add TRX & TON & BTC & XMR & SOL to Donation & NFTs by @RPRX in 8a4b0a9
• README.md: Add v2rayN to macOS & Linux Clients by @alen420 in #5271
• Socks: Fix buffer full panic when encoding large UDP packets by @vemneyy @Fangliding in #5252
• Docker: Use more aggressive inlining for higher efficiency by @Meo597 in #5242
• Refactor WrapLink logic by @Fangliding in #5288
• HTTP outbound: Read negotiated protocol from uTLS by @hax0r31337 in #5251
• DNS: Fix wrong protocol parse by @vanserox @Fangliding in #5232
• refactor(dns): enhance cache safety, optimize performance, and refactor query logic by @Meo597 in #5248
• perf(GeoIPMatcher): faster heuristic matching with reduced memory usage by @Meo597 in #5289
• perf(router): adjust the order of rules to optimize performance by @Meo597 in #5267
• perf(dns): cache network capability check by @Meo597 in #5244
• feat(dns): add optimistic caching by @Meo597 in #5237
• feat(dns): add parallel query by @Meo597 in #5239
• Router: Remove the deprecated UseIP option by @Meo597 in #5323
• Sockopt config: Add trustedXForwardedFor (for XHTTP, WS, HU inbounds) by @RPRX in #5331
• VLESS Reverse Proxy: Forbid reverse-proxy UUID using forward-proxy, enabled by default by @RPRX in a83253f
• fix(dns): inheritance issue with disableCache by @Meo597 in #5351
• XTLS Vision: Check TLS record isComplete by @yuhan6665 in #5179
• XTLS Vision: Add testpre (outbound pre-connect) and testseed (outbound & inbound) by @RPRX @Fangliding in #5270
• XTLS Vision: Fix IsCompleteRecord() by @Fangliding in #5365
• XTLS Vision: Discard expired pre-connect conn automatically by @RPRX in c123f16
• XTLS Vision: Fix enabled uplink splice flag by mistake by @yuhan6665 in #5391
• XTLS Vision: LogInfo() -> LogDebug() by @RPRX in bd7503d
• Chore: Remove ctlcmd and leftover envvar by @KobeArthurScofield in #5392

New Contributors

• @Exclude0122 made their first contribution in #5304
• @alen420 made their first contribution in #5271
• @vemneyy made their first contribution in #5252
• @vanserox made their first contribution in #5232

Full Changelog: v25.10.15...v25.12.8

See https://github.com/XTLS/Xray-core/releases/tag/v25.12.8

See https://github.com/XTLS/Xray-core/releases/tag/v25.12.8