to use Codespaces. Openwrt Passwall Openwrt PasswallLineolShadowsocksR-PlusOpenWrt Openwrt. Powered By GitBook Shadowsocks client has supported a lot types of clients. OpenWrt-SSRPLUS has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. To get rid of the DNS sppofing we need ChinaDNS, which creates a UDP DNS Server at a certian local port. The GFW intercepts all UDP traffic on port 53(traffic on UDP port 53 usually means that it is a DNS lookup) and quickly, ahead of the real DNS server, send a fake response to the user when it finds the domain keyword matches the GFW blacklist. After installing the package above, we may find Shadowsocks under the Services tab: Notice that Proxy Method can be Global Proxy if you want all traffic go though the remote server. Background. satisfy_dependencies_for: Cannot satisfy the following dependencies for luci-app-ssr-plus: You can configure your router with IPTABLES to proxy all tcp traffic transparently. openwrt. leanluci-app-ssr-plusopenwrtshadowsocks-libev, v2rayopenwrtv2rayopenwrt-v2rayluci-app-v2rayDNSChinaListGFWListluci-app-ssr-plus, , package, , LuCI > Applications, ssv2raykcpssr, luci-app-ssr-plusM, Openwrt/LEDE 18.06LEDE/OpenWRT , bin/packages//base/luci-app-ssr-plus. iptables ipset. r/openwrt I installed an openwrt router (RPi with Alfa nic) for elderly relatives but they are cranky because it keeps going offline, and they can't monitor their nest from Florida.
Configure ShadowSocks client on OpenWrt - Stack Overflow Download OpenWrt source from dev or SDK from downloads. ssr-plus Hello, how i can setup shadowsocks on openwrt router. coreutils With the launch of MeTV+ (MeTV Plus) in Chicago, you can see more of your favorite shows on a whole new network. shadowsocks-libev LuCI , SOCKS5 . shadowsocks-libev, . About an argument in Famine, Affluence and Morality. shadowsocks-libev-spec is the core Shadowsocks package for OpenWRT and luci-app-shadowsocks-spec provides a web interface for Shadowsocks so that we can just fill out the configuration form to setup the Shadowsocks service. Set at least IP, port, method and password, and don't forget to untick the Disable checkbox. Never miss out on a good deal again by adding our Smarty browser extension today for free! Shadowsocks.
openssl shadowsocks (openssl). Used You should install thoes dependent packages frist: dns2socks_2.1-20200218_x86_64.ipk ipt2socks_1..2-1_x86_64.ipk microsocks_1.-1_x86_64.ipk naiveproxy_91..4472.77-1-1_x86_64.ipk jeff May 28, 2019, 6:17pm #2
openwrt 18.06.1 . openwrt | by Shuyi Yuan | Medium By this way the GFW may block foreign websites by faking the results of DNS queries that was made under it, which means that clients can not get the real IP address of the domain name, so of course they can not reach to the real server. OpenWrt-SSRPLUS is a Shell library typically used in Embedded System applications. To associate your repository with the ShadowsocksR SSR plus+ GLOpenWRT openwrt 22.03 openwrt ShadowsocksR plus+ ShadowsocksR SSR Plus+ IPK SSR! I contacted support, and there seems to be an issue with MT300x models. ShadowSocksR Plus+SSR Plus,SS/SSR/V2Ray/TrojanSSR Plus, 3ShadowSocksr Plus+, 4SS/SSR/V2Ray/Trojan, 5OK, 102, 11IPIPIPGFW-IP, LAN IPLAN IP, /baidu.com,hbo, 166030, , ShadowSocksr Plus+, ByWaveIEPLV2RayIEPLIEPLGFWGFW. coreutils-base64
ShadowsocksR-Plus coolsnowwolf Openwrt SS/SSR/V2ray/Trojan DNS Netflix ShadowsocksR-Plus Can someone tell me in detail how to setup shadowsocks client on openwrt?. openwrt VirtualBoxopenwrtLAN Does a summoned creature play immediately after being summoned by a ready action? After installing the package above, we may find Shadowsocks under the Services tab: We use it to break though the Chinese network block so that we can visit Google without blocking. sign in However, Shadowsocks can not be installed on some devices such as non-jailbroken iOS devices(has a app store version but only the built-in browser works), Xbox and PS4. Now I want to configure this on my GL-MT300A with OpenWrt. shadowsocks is a fast tunnel proxy that helps you bypass firewalls. v2ray You signed in with another tab or window. You can download it from GitHub. SSR , OpenWrt PassWall R2S OpenWrt ShadowSocksR Plus+ SSR Plus+ Plus+, Copyright 2023 SSR Powered by WordPress, iOSAPPQuantumultSurgeLoon, PassWall Unknown package luci-app-passwall . . Let your shopping adventure begin. If you preorder a special airline meal (e.g.
Enjoy More of MeTV on MeTV+ - Me-TV Network It's bridged to the modem/router combo. If nothing happens, download Xcode and try again. Are you sure you want to create this branch? What package i need to install? What is the point of Thrower's Bandolier? ShadowsocksR-Plus coolsnowwolf Openwrt SS/SSR/V2ray/Trojan DNS Netflix ShadowsocksR-Plus ssr-plus By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior.
2023 OpenWrt SSR Plus+ - SSR MeTV is America's #1 Classic Television Network thanks to the memorable shows and our incredible fans. Set at least IP, port, method and password, and don't forget to untick the Disable checkbox. Watch as Smarty applies the best coupons at checkout for many of your favorite online retailers. Useful Websites. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2, Rotate through Shadowsocks proxy via Python.
openwrt-shadowsocksr - ShadowsocksR-libev for OpenWrt LEDE By using the website, you agree with storing cookies on your computer. dnsmasq dnsmasq-full . I write posts about things I learned. Automated savings while you shop!
Download OpenWrt source from dev or SDK from downloads. It works as a SOCKS proxy. You solve this by running the following from ssh on your router: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. However, if you're not living in China but still have the difficulty playing online games as the ping is too high and connection is unstable, you can still try Shadowsocks as it may bring you a more stable network environment as long as the performance of your remote server is not too bad.
Smarty - Chrome Web Store - Google Chrome The difference between the phonemes /p/ and /b/ in Japanese. You signed in with another tab or window. shadowsocks is a fast tunnel proxy that helps you bypass firewalls. Log into OpenWrt via SSH and edit the config file /etc/config/shadowsocks.json. Do I need a thermal expansion tank if I already have a pressure tank? Not the answer you're looking for? Is there ShadowsocksR server in OpenWrt for x86/router? And go to the root of the SDK or source. If you do not agree leave the website. Than you could install the main packages: This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Where do I watch MeTV in Los Angeles - MeTV? - Me-TV Network A package of shadowsocks for OpenWrt. A tag already exists with the provided branch name. https://openwrt.org/docs/guide-user/services/proxy/shadowsocks and https://forum.openwrt.org/t/guide-shadowsocks-setup-on-openwrt-for-beginners/77026. Related projects, such as DD-WRT, Tomato and OpenSAN, are also on-topic. I did add my ShadowSocks server under "Servers Manage", with the details I would otherwise have in my shadowconfig-client.json file. 1.ShadowsocksShadowsocks 2.ShadowsocksiP Shadowsocks 3.Shadowsocks Socks5Socks5Socks5 Socks5 There is the ShadowSocks section in the OpenWrt config, but I don't know what to setup for Transparent Proxy, SOCKS5 Proxy and Port Forward. polarssl shadowsockspolarssl . Does Counterspell prevent from any further spells being cast on a given turn? All services (Transparent Proxy, SOCKS5 Proxy and Port Forward) are listed above as NOT RUNNING (see image). Add a description, image, and links to the This is a OpenWrt's package description for shadowsocks-libev. One of them is the DNS spoofing, also named DNS Cache Poisoning. GL.inet AR750s Official OpenWrt Ssr+Plus Technical Support cattle January 15, 2021, 2:04am #1 The Ar750S firmware is customized based on Openwrt. How to use NGINX as forward proxy for any requested location? luci-app-ssr-plus, luci-app-ssr-plusopenwrtdnsmasqDNSdnsmasq-full, , #817#1599pdnsddnsforwarder, luci-app-ssr-plusIPGFWIP, ssGFWv2rayss, IPjustmysocksIP. It works as a SOCKS proxy. cpu CPU LinuxCPU This channel is limited to Chicago and Kingman, Arizona at launch. Work fast with our official CLI.
Setting ShadowsocksR Plus+ OpenWrt REYRE-STB - YouTube Thanks.
OpenwrtSSR-plus Guide: Shadowsocks setup on OpenWrt for beginners ShadowSocksR Plus+ OpenWrt ShadowSocksR Plus+ Plus+ ShadowSocksR Plus+ URLURLURL
shadowsocksr plus+ ssr plus openwrt | GL-MT300N-V2 ShadowsocksR (SSR) ipk Thanks . pdnsd-alt For installation and configuration of Shadowsocks on a remote server and on the local client, please visit Shadowsocks.org. satisfy_dependencies_for: Cannot satisfy the following dependencies for luci-app-ssr-plus: shadowsocksr-libev-alt ipset ip-full iptables-mod-tproxy dnsmasq-full coreutils coreutils-base64 bash pdnsd-alt wget shadowsocks-libev-ss-redir v2ray opkg_install_cmd: Cannot install package luci-app-ssr-plus. asuswrt/merlin/openwrt 1SSH (arm380/X7.x1.4.8) sed-i's/\tdetect_package/\t# detect_package/g'/koolshare/scripts/ks_tar_install.sh 2386:x: /
Radenku Populer Post. This website uses cookies. Cara install ShadowSocksr Plus openwrt di semua router. OpenWrt news, tools, tips and discussion. If nothing happens, download GitHub Desktop and try again.
- v2ray :
operwrtShadowSocksr Plus+ - After the installation of the two above pcakges. Los Angeles - MeTV - Spectrum 12 / 16 / 20 / 21 / 23 / 27 / 29 / 34 / 36 / 45 / 54 / 70 / 240 / 723 / 1237.
GitHub - haohaolee/shadowsocks-openwrt: A package of shadowsocks for Done!
Is there ShadowsocksR server in OpenWrt for x86/router? OpenWrt ShadowsocksR-Plus | Help Center . shadowsocks-openwrt.
Openwrt Passwall Here's a summary on how to install and setup shadowsocks on a fresh OpenWrt 19.06 installation, (taken from this forum post ) Cara Install ShadowSocksR Plus Openwrt Terbaru. 2ShadowSocksr Plus+. bash If you want to use shadowsocks on those devices, there are two ways to do it. ip-full Press J to jump to the feed. Configure services and rules: The simplest recipe is to forward all traffic through the tunnel. shadowsocks-libev-spec is the core Shadowsocks package for OpenWRT and luci-app-shadowsocks-spec provides a web interface for Shadowsocks so that we can just fill out the configuration form to setup the Shadowsocks service. Has 90% of ice around Antarctica disappeared in less than a decade. Curate this topic Add this topic to your repo
king19940104/luci-app-ssr-plus: openwrt luci-app-ssr-plus backup - GitHub You can watch MeTV on the following stations: Los Angeles - MeTV - KAZA (Over the air) 54.1 - To view the MeTV Los Angeles station info page, click here.
World Poker Tour Programming Now Available for Samsung TV Plus Viewers A tag already exists with the provided branch name. How to configure Tomcat 8 as a go-between proxy? , , LuCI . OpenWrt software has two distinct branches: a stable Release build that is suitable for production use, and a Development build that contains an ever-evolving set of enhancements. 1ShadowSocksr Plus+. opkg_install_cmd: Cannot install package luci-app-ssr-plus. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. OpenWrt PassWall R2S OpenWrt ShadowSocksR Plus+ SSR Plus+ Plus+ SSSSRV2RAYTROJANSOCKS5TUN Plus+ Turbo ACC ChinaDNS
OpenWrt SSR Plus+ - XTrojan Self-registration in the wiki has been disabled.
Do new devs get fired if they can't solve a certain bug? Recently Shawdowsocks has become a lot more popular in China. OpenWRT Official master source code + CTCGFW & Lean's packages code, Use Github Actions to automatically compile Lean's Modified Lede source for K2P, R7800 Build OpenWrt using GitHub Actions | GitHub Actions R7800 OpenWrt , OpenWrt Frimwares for FriendlyARM NanoPi R4S, k3Macssr-plusv2ray,xray, R7800 Build OpenWrt using GitHub Actions | GitHub Actions R7800 OpenWrt. e.g. If not, please visit OpenWrt First Login.
OpenWrt ShadowSocks | Belen.write() How to follow the signal when reading the schematic? topic, visit your repo's landing page and select "manage topics.". For Developers longwangwl May 28, 2019, 5:37pm #1 Final goal is to setup a SSR server openwrt on a router in order for people in China to bypass GFW. Setting konfigurasi ShadowSocksr plus+ Xray, V2ray. WannaFlix Sub-sites and Tools. Create an account to follow your favorite communities and start taking part in conversations. openwrt luci-app-ssr-plus backup This repository is collected from the internet, for Lede/openwrt x86_x64 to used. : You can download the latest prebuilt packages from http://buildbot.sinaapp.com. It is very troublesome to make v2ray by myself. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 3 OpenAI ChatGPT 100%. shadowsocksr plus+ ssr plus openwrt | 2023 TV 499 subscribers Subscribe 0 Share 3 views 2 minutes ago #TV shadowsocksr plus+ . The simplest recipe is to forward all traffic through the tunnel. How to configure it? ChinaDNS may appear under the Services tab. You should install thoes dependent packages frist: pdnsd-alt_1.2.9b-par-a8e46ccba7b0fa2230d6c42ab6dcd92926f6c21d_x86_64.ipk, shadowsocks-rust-sslocal_1.11.1-1_x86_64.ipk, shadowsocks-rust-ssserver_1.11.1-1_x86_64.ipk, shadowsocksr-libev-ssr-check_2.5.6-8_x86_64.ipk, shadowsocksr-libev-ssr-local_2.5.6-8_x86_64.ipk, shadowsocksr-libev-ssr-redir_2.5.6-8_x86_64.ipk, shadowsocksr-libev-ssr-server_2.5.6-8_x86_64.ipk. XTrojan, OpenWrt PassWall R2S OpenWrt ShadowSocksR Plus+ SSR Plus+ Plus+ SSSSRV2RAYTROJANSOCKS5TUN Plus+ Turbo ACC ChinaDNS, aarch64_generic ShadowSocksR Plus+ R2SR4SN1 arm64 , ShadowSocksR Plus+ OpenWrt ShadowSocksR Plus+ , ShadowSocksR Plus+ URLURLURL, , YouTubeDNSChinaDNS , YouTubeGFW IP, 100M + YouTube 4K 38638KbpsGsou 4K, 100M YouTube 4KYouTube 38638KbpsTurbo ACC BBRDNS DNSpod DNS. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Configure ShadowSocks client on OpenWrt [closed], a specific programming problem, a software algorithm, or software tools primarily used by programmers, How Intuit democratizes AI development across teams through reusability. This has been happening since I installed it. topic page so that developers can more easily learn about it. Install shadowsocks on a router and build a transparent proxy, so that any device connected to the router was proxied by the remote server. ncdu: What's going on with this second size column?
ssr-plus GitHub Topics GitHub How to Run Shadowsocks in a Router With OpenWRT | ding.dev Edit the existing sss0 server (or add a new one). Use Git or checkout with SVN using the web URL. Is a PhD visitor considered as a visiting scholar? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 2023 XTrojan XTrojan , V2RaySSRPlusPassWallOpenClash, SS/SSR/Trojan/Xray/V2Ray | IPLC/IEPL | Netflix/HBO/Hulu, Just My Socks - | | | , V2rayN windows V2rayNG Android V2rayN V2rayNG , iOSShadowrocket/Quantumult/Surge/Loon.
OpenWrt SSR Plus+ - [OpenWrt Wiki] Downloads - [OpenWrt Wiki] Welcome to the OpenWrt Project . Now you may check your public IP address to see if it is the same as your shadowsocks server. And run ChinaDNS on the same port. When a DNS query was made by the client to the ChinaDNS server, it looks up from the upstream DNS server. What can I do to fix it/troubleshoot? shadowsocks-libev-ss-redir Connect and share knowledge within a single location that is structured and easy to search. Learn more. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers.
luci-app-shadowsocksR-GFW_1.2.1_all is G_F_W_list mode Installation scp luci-app-shadowsocksR***_1.2.1_all.ipk root@192.168.8.1:/tmp ssh root@192.168.8.1 cd /tmp opkg update opkg install luci-app-shadowsocksR***_1.2.1_all.ipk Download from Google Drive Download from Filedropper 4 Likes Ledes-s-r wood September 5, 2018, 10:51am #2 OpenWrt PassWall R2S OpenWrt ShadowSocksR Plus+ SSR Plus+ Plus+ SSSSRV2RAYTROJANSOCKS5TUN Plus+ Turbo ACC ChinaDNS, aarch64_generic ShadowSocksR Plus+ R2SR4SN1 arm64 , luci-i18n-ssr-plus-zh-cn_178-6_all.ipk, ShadowSocksR Plus+ OpenWrt ShadowSocksR Plus+ , ShadowSocksR Plus+ URLURLURL, , YouTubeDNSChinaDNS , YouTubeGFW IP, 100M + YouTube 4K 38638KbpsGsou 4K, 100M YouTube 4KYouTube 38638KbpsTurbo ACC BBRDNS DNSpod DNS, 1. opkg install iptables-mod-nat-extra ipset libopenssl. Kategori openwrt. 3ShadowSocksr Plus+ . ShadowSocksr Plus+. dnsmasq-full However, if you want to bypass all the traffic to Chinese IPs, you may choose Ignore List, which was defined at /etc/shadowsocks/ignore.list in default. Can archive.org's Wayback Machine ignore some query terms? 1. opkg install iptables-mod-nat-extra ipset libpolarssl.
ShadowsocksR-Plus - WannaFlix Currently, we only provide prebuilt packages for ar71xx and bcm47xx platforms. If you believe the question would be on-topic on another Stack Exchange site, you can leave a comment to explain where the question may be able to be answered. Download OpenWrt firmware specific for your device In the Luci Web UI, head to Services > Shadowsocks-libev > Remote Servers and edit the existing sss0 server (or add a new one). openwrt-shadowsocks shadowsocks-libev . All services (Transparent Proxy, SOCKS5 Proxy and Port Forward) are . There was a problem preparing your codespace, please try again. Fill out the configuration form and choose Save & Apply, then Shadowsocks will run as a deamon in the background.
fancyss - | fancyss This repository is collected from the internet, for Lede/openwrt x86_x64 to used. e.g. How do I start those or do I need those for my ShadowSocks client anyways? in the readme file under Recipes > forward all, CC Attribution-Share Alike 4.0 International. openwrt x86-64 lean openwrt-zh-cn k2p github-actions openwrt-firmware ssr-plus r619ac k2p-firmware Updated on Nov 10, 2022 Shell Improve this page Add a description, image, and links to the ssr-plus topic page so that developers can more easily learn about it. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. By clicking the "Add to Chrome" button and installing the "Smarty" browser extension, you . The installation of ChinaDNS is pretty easy. Also you acknowledge that you have read and understand our Privacy Policy. Import Account-Support Hostname-Vmess-Trojan-Sadowsocks-Auto SwitchGame Mode UDP Server-Mengalihkan Game ClientNetflix Node-Hotstar & NetflixDeny Domain-Blok. SSR https://ssr.software/775.html How do I connect from OpenWrt with ShadowSocks to my server and redirect all traffic through that connection? OpenWRT/LEDEShadowsocksrGFWList 2018-10-25 SSR (3) ShadowsokcsRSSR SSRGFWList OpenWRTLEDEShadowsocksShadowsocksRGFWList iPIPIP What is the correct way to screw wall and ceiling drywalls?
OpenWrt-SSRPLUS | OpenClash IPK files ( specific for x86_64 architecture Build from source. Find centralized, trusted content and collaborate around the technologies you use most. shadowsocksr-libev-alt Is there a proper earth ground point in this switch box? Are you sure you want to create this branch? To get ChinaDNS to work, we have to forward DNS querys to a local port of the router. If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. iptables-mod-tproxy Already available to Samsung TV Plus viewers in the United States and Canada, poker fans in the United Kingdom, Sweden, Netherlands,
How to setup ShadowSocks Vpn client on Openwrt Router : r/openwrt - reddit You signed in with another tab or window. Want to know if it has already been developed in openwrt. This is a OpenWrt's package description for shadowsocks-libev.
OpenWRT/LEDEShadowsocksrGFWList-SSR Its working (as tested with my laptop). Is it possible to rotate a window 90 degrees if it has the same length and width? Los Angeles, CA (October 13, 2021) - The World Poker Tour announced today that WPT content is now available to millions of Samsung Smart TV owners in nine key European markets via Samsung TV Plus. Except where otherwise noted, content on this wiki is licensed under the following license:CC Attribution-Share Alike 4.0 International. Why do academics stay as adjuncts for years rather than move around? latest version: shadowsocks-libev-1.
GL.inet AR750s Official OpenWrt Ssr+Plus Press question mark to learn the rest of the keyboard shortcuts, https://openwrt.org/docs/guide-user/services/proxy/shadowsocks, https://forum.openwrt.org/t/guide-shadowsocks-setup-on-openwrt-for-beginners/77026. ChinaDNS has a built-in IP blacklist. rev2023.3.3.43278. I did add my ShadowSocks server under "Servers Manage", with the details I would otherwise have in my shadowconfig-client.json file.
openwrt shadowsocksr plus+ Subscriptions are not yet supported, and lines cannot be monitored.
[OpenWrt Wiki] Shadowsocks - [OpenWrt Wiki] Welcome to the OpenWrt Project Firstly, I assume that openWRT has been succesfully installed on the router, you know how to login to the router via ssh and you know how to config a Shadowsocks client. luci shadowsocks-libev lede vegan) just to try it, does this inconvenience the caterers and staff? If the result matches an entry from the IP blacklist, ChinaDNS would regard it as a fake IP address and would wait for the result from the real DNS server. . Install SSR plus openwrt ipk menggunakan opkg github. I have a ShadowSocks server running on my server. Here's a summary on how to install and setup shadowsocks on a fresh OpenWrt 19.06 installation, (taken from this forum post), you need to install the following packages, and if you need the Luci web interface also, In the Luci Web UI, head to Services > Shadowsocks-libev > Remote Servers if going from CLI the config file is /etc/config/shadowsocks-libev. ipset Firstly, install shadowsocks-libev-spec and luci-app-shadowsocks-spec in order. Please There is the ShadowSocks section in the OpenWrt config, but I don't know what to setup for Transparent Proxy, SOCKS5 Proxy and Port Forward.
wget Follow the steps outlined in the readme file under Recipes > forward all, This must be done via command line according to the instructions in in the readme file under Recipes > forward all. If you're living in China and have the demand of visiting websites like Google, Twitter, YouTube and BBC, Shadowsocks is a great choice to build your proxy server. Unfortunately, only ss and Wireguard are available.
Ssr Plus | RADENKU.COM Then start the service like this: The latest shadowsocks-libev has provided a transparent mode. Do roots of these polynomials approach the negative of the Euler-Mascheroni constant? Disconnect between goals and daily tasksIs it me, or the industry? The GFW(Great Firewall of China) has multiple methods to block network. 09/05/2022 04/02/2022. And go to the root of the SDK or source. Enjoy More of MeTV on MeTV+. Why is there a voltage on my HDMI and coaxial cables? Hey, I'm Peixuan, a software engineer.
Dream Of Police Arresting Someone,
La Crosse Police Scanner,
Infection Control Ati Pretest Quizlet,
Houses For Sale In Skane Sweden,
Articles O