User:Jonathan de Boyne Pollard/Guide to blocking IP version 6 addresses

Hierdie blad is 'n opstel. Dit gee die mening en idees weer van enkele gebruikers op Meta-Wiki, wat besmoontlik nie deur almal gedeel word nie. Dit is ook nie 'n amptelike beleid of riglyn op Meta-Wiki nie, maar kan wel so geag word op ander Wikimedia-projekte. Voel asseblief vry om hierdie bladsy soos benodig by te werk, of gebruik die kletsblad om groot wysigings voor te stel. هذه نصيحة. تعبر عن آراء وأفكار بعض مستخدمي ميتا-ويكي لكن قد لا تكون مدعومة على نطاق واسع. هذه ليست سياسة على ميتا-ويكي، لكنها قد تكون سياسة أو إرشاد في مشاريع ويكيميديا آخرى. لا تتردد في تحديث هذه الصفحة عن الحاجة، أو استخدم صفحة النقاش للتعديلات الجوهرية. Esto ye un ensayu. Espresa les opiniones y les idees d'algunos wikimedistes o usuarios de Meta-Wiki, pero pue ser que nun tenga un sofitu ampliu. Esto nun ye una política de Meta-Wiki, pero pue ser una política o direutiva n'otros proyeutos de Wikimedia. Tien llibertá p'anovar esta páxina como necesite, o use la páxina d'alderique pa proponer cambeos importantes. Гэта эсэ. Яно выражае думкі і ідэі некаторых вікіпэдыйцаў або мэта-вікійцаў, але не абавязкова зьяўляецца меркаваньнем большасьці. Гэта не старонка правілаў Мэта-Вікі, але можа зьяўляцца правілам або рэкамэндацыяй у іншых праектах Вікімэдыі. Вы можаце абнаўляць гэтую старонку як заўгодна, а можаце скарыстацца старонкай абмеркаваньня, каб прапанаваць істотныя зьмяненьні. Ovo je esej. Sadrži misli i ideje nekih korisnika Meta-Wikija, ali ne mora nužno da bude široko prihvaćen. Ovo nije pravilo na Meta-Wikiju, ali može da budi pravilo ili uputa na drugim projektima Wikipedije. Slobodno promijenite ovu stranu po potrebi ili koristite stranu za razgovor za veće promjene. Açò és un assaig. Expressa les opinions i idees d'alguns usuaris de Wikimedia o del Meta-Wiki però pot ser que no tingui un ampli suport. Això no és una política del Meta-Wiki, però pot ser política o guia d'estil en algun altre projecte Wikimedia. Sentiu-vos lliures d'actualitzar aquesta pàgina quan faci falta o utilitzeu la pàgina de discussió per a proposar-hi canvis d'importància. Toto je esej. Vyjadřuje názory a náměty některých wikimedianů nebo uživatelů Meta-Wiki, ale nemusí mít širokou podporu. Toto není pravidlo Meta-Wiki, ale může to být pravidlo, doporučení či vodítko na jiných projektech Wikimedia. Můžete tuto stránku aktualizovat podle potřeby, nebo použijte diskusní stránku k návrhům větších změn. Traethawd yw hwn. Mae'n mynegi barnau a syniadau o rai defnyddwyr Wicimedia neu Meta-Wici ond efallai nad oes ganddo gefnogaeth lydan. Nid yw hwn yn bolisi Meta-Wiki, ond y gallai fod yn bolisi neu ganllaw ar brosiectau Wikimedia eraill. Mae croeso i chi ddiweddaru'r dudalen hon wrth angen, neu ddefnyddio'r dudalen sgwrs er mwyn cynnig prif newidiadau. Dette er et essay. Det udtrykker visse Wikimedia- eller Meta-Wiki-brugeres holdninger og idéer, som ikke nødvendigvis deles af et flertal. Dette udgør ikke en politik på Meta-Wikien, men det kan være en politik eller et regelsæt på et andet Wikimedia-projekt. Du er velkommen til at ændre denne side efter behov, eller til at foreslå større ændringer på diskussionssiden. Dies ist ein Essay. Es drückt die Meinungen und Ideen einiger Meta-Wiki-Benutzer aus und wird eventuell nur von wenigen Benutzern unterstützt. Dies ist keine Richtlinie aus dem Meta-Wiki, kann aber Richtlinie oder Leitsatz in anderen Wikimedia-Projekten sein. Aktualisiere diese Seite falls nötig, oder benutze die Diskussionsseite, um größere Veränderungen vorzuschlagen. Dies ist ein Essay. Er drückt die Meinungen und Ideen einiger Meta-Wiki-Benutzer aus und wird eventuell nur von wenigen Benutzern unterstützt. Dies ist keine Richtlinie aus dem Meta-Wiki, kann aber Richtlinie oder Leitsatz in anderen Wikimedia-Projekten sein. Tun Sie sich keinen Zwang an und aktualisieren Sie diese Seite falls nötig, oder benutzen Sie die Diskussionsseite, um größere Veränderungen vorzuschlagen. Αυτό είναι ένα δοκίμιο. Εκφράζει τις απόψεις και τις ιδέες κάποιων χρηστών του Meta-wiki αλλά ενδέχεται να μην έχει ευρεία υποστήριξη. Δεν είναι πολιτική του Meta-wiki, αλλά ενδεχομένως είναι πολιτική ή οδηγία σε κάποιο άλλο εγχείρημα του Wikimedia. Μπορείτε να ενημερώσετε αυτή την σελίδα αν χρειάζεται, ή χρησιμοποιήστε την σελίδα συζήτησης για να προτείνεται μεγαλύτερες αλλαγές. This is an essay. It expresses the opinions and ideas of some wikimedians or Meta-Wiki users, but may not have wide support. This is not policy on the Meta-Wiki, but it may be a policy or guideline on other Wikimedia projects. Feel free to update this page as needed, or use the discussion page to propose major changes. Este es un ensayo. Este texto expresa opiniones e ideas de algunos usuarios, pero pueden no tener un amplio consenso. Esta no es una política de Meta pero puede sí serlo en otros proyectos. Usted tiene libertad para actualizar esta página o usar su página de discusión para proponer cambios mayores. See on essee. See tekst väljendab Meta-Wiki kasutajate ideid ja arvamusi, kuid sellel ei pruugi olla laiapõhjalist toetust. Tekst ei ole Meta-Wiki ametlik poliitika, aga võib olla ametlik poliitika või juhtnöör mõnes teises Wikimedia projektis. Vastavalt vajadusele võite seda lehte uuendada või kasutada arutelu lehte, et pakkuda välja suuremaid muudatusi. Jen eseo. Ĝi esprimas la opiniojn kaj ideojn de iuj Vikipediistoj aŭ uzantoj de Meta-Wiki, sed eble ne havus vastan subtenon. Ĝi ne estas la regularo de Meta-Wiki, sed ĝi eble estas regularo en aliaj projektoj de Wikipedia. Laŭvole ĝisdatigu ĉi tiun paĝon laŭ bezono, aŭ uzu la diskuto-paĝon por proponi grandajn ŝanĝojn. این صفحه یک انشا است. این صفحه نظر و ایدهٔ برخی از کاربران فراویکی را بیان می‌کند اما ممکن است از حمایت گسترده‌ای برخوردار نباشد. این صفحه یک سیاست در فراویکی نیست، اما ممکن است سیاست یا رهنمودی در دیگر پروژه‌های ویکی‌مدیا باشد. آزادانه آن را به روز کنید، و برای تغییرهای بزرگ از صفحهٔ بحث استفاده کنید. Tämä on essee. Se ilmaisee joidenkin wikimedialaisten tai Meta-Wikin käyttäjien mielipiteitä tai ajatuksia, mutta sillä ei välttämättä ole laajaa kannatusta. Tämä ei ole Meta-Wikin käytäntö, mutta saattaa olla käytäntö tai ohje muissa Wikimedia-hankkeissa. Päivitä tätä sivua tarpeen mukaan tai ehdota isoja muutoksia keskustelusivulla. Ceci est un essai. Il exprime les opinions et les idées de certains contributeurs de Meta-Wiki, mais peut ne pas rencontrer le soutien des autres. Il n'est ni une règle ou une recommandation sur Meta-Wiki, mais peut l'être sur d'autres projets Wikimédia. N'hésitez pas à modifier cette page si besoin est, ou à proposer des changements majeurs sur la page de discussion. Dit is in essay. It jout mieningen en ideeën wer fan guon meidoggers op Meta-Wiki, mar it is net sein dat eltsenien it der mei iens is. Dit is ek gjin offisjeel belied of rjochtline op Meta-Wiki, al kin dat wol sa wêze op oare Wikimedia-projekten. Fiel jo frij om dizze side wêr't dat nedich is bij te wurkjen of om grutte wizigings út te stellen op de oerlisside. Isto é un ensaio. Expresa as opinións e ideas dalgúns wikimedistas ou usuarios de Meta-Wiki pero poida que non teña un amplo apoio. Non é unha política en Meta-Wiki, pero si pode selo noutro dos proxectos da Wikimedia. Síntete libre de actualizar esta páxina se cómpre ou fai uso da páxina de conversa para propor grandes cambios. Des isch e Essay. Är druckt d Meinige un Idee vun e baar Meta-Wiki-Benutzer uus un wird unter Umständ nume vu wenig Benutzer unterstitzt. Des isch kei Richtlinie us em Meta-Wiki, cha aber Richtlinie oder Leitsatz in andere Wikimedia-Projäkt syy. Due der kei Zwang aa un due die Syte wänn netig aktualisiere, oder bruuch d Diskussionssyte go greßeri Veränderige vorschlaa. עברית: דף זה הוא מאמר. הדף מבטא את הדעות והרעיונות של חלק מהמשתמשים במיזמי קרן ויקימדיה או במטא־ויקי, אך ייתכן שאין להם תמיכה נרחבת. דף זה הוא לא דף מדיניות במטא־ויקי, אך ייתכן שהוא דף מדיניות או דף הנחיות במיזמי ויקימדיה אחרים. הרגישו חופשיים לעדכן את הדף לפי הצורך, או השתמשו בדף השיחה להצעת שינויים משמעותיים. Ovo je esej. Izražava mišljenja i zamisli nekih wikimedijaca ili nekih suradnika Meta-Wikija, ali ne mora nužno biti široko prihvaćenim niti imati veliku potporu. Ovo nije pravilom na Meta-Wikiju, ali može biti politikom ili smjernicom na drugim Wikimedijinim projektima. Slobodno ažurirajte ovu stranicu po potrebi ili rabite stranicu za razgovor radi predlaganja većih izmjena. Ez egy esszé. Néhány Wikimédia- vagy Meta-Wiki-felhasználó véleményét fejezi ki, de lehet, hogy nem kapott széles körű támogatást. Nem irányelv a Meta-Wikin, de irányelv vagy útmutató lehet más Wikimédia-projektekben. Szabadon frissítheted ezt a lapot, ha szükséges, vagy használd a vitalapot, ha nagyobb változtatást szeretnél javasolni. Isto es un essayo. Illo exprime le opiniones e ideas de alcun wikimedianos o usatores de Meta-Wiki, ma pote esser non appoiate per le consenso general. Isto non es un politica del Meta-Wiki, ma pote esser un politica o directiva in altere projectos de Wikimedia. Sia libere de actualisar iste pagina in caso de necessitate, o usa le pagina de discussion pro proponer major alterationes. Ini adalah sebuah esai. Esai ini menyatakan pendapat dan gagasan dari beberapa Wikimediawan atau pengguna Meta-Wiki dan mungkin tidak didukung oleh komunitas secara meluas. Esai ini bukan kebijakan Meta-Wiki, tapi mungkin saja merupakan kebijakan atau pedoman di proyek-proyek Wikimedia lainnya. Silakan memperbarui halaman ini seperlunya, atau gunakan halaman pembicaraan untuk mengusulkan perubahan besar. Questo è un saggio. Esprime le opinioni e le idee di alcuni utenti di Meta-Wiki, ma potrebbe non incontrare il sostegno di altri. Non è una raccomandazione o una linea guida di Meta-Wiki, ma potrebbe esserlo su altri progetti Wikimedia. Non esitate a modificare questa pagina, se occorre, o a proporre modifiche rilevanti nella sua pagina di discussione. この記事はエッセイです。何人かのメタウィキの利用者の意見と考えを表していますが、幅広い支持を得ているとは限りません。メタウィキの方針ではありませんが、他のウィキメディア・プロジェクトの方針かガイドラインであるかもしれません。必要に応じてこのページを遠慮なく編集し、大きな変更の提案にはこの記事のノートを使用してください。 이 문서는 수필입니다. 이것은 일부 사용자의 의견을 나타낸 것으로, 총의를 얻지 않았을 수 있습니다. 이 문서는 메타위키 정책은 아니지만, 다른 위키미디어 프로젝트에서 정책이나 지침으로 사용하고 있을 수도 있습니다. 이 문서를 편집하거나 주요 내용을 바꿔야 한다면 토론 문서를 이용해 주세요. Dat hee ess ënë Opsatz. Dat hejß, dat ët dë Mejnonge un Ideeë vun elke Wikimediaanere odër Meta-Wikie Benotzere widdërjiff, äwwër onger Ömständen kejne wejtrejschende Ongerstötzung jeneeß. Ët ess allsu kej Vürschreff op Meta-Wiki, künnt äwwer ë Fürschreff oder Reschtleenije op aandere Wikimedia-Projekten sinn. Ihr künnt jään dë Sigk aktuwaliseere, odër de Klaafsigk för öm wejtjrejfende Ändëronge vürzoschlaage. Tai yra Vikipedijos rašinys. Čia pateikta vieno ar keleto naudotojų (o gal ir visos bendruomenės) nuomonė kai kuriais Vikipedijos tvarkos klausimais. Jis skirtas ne pačiai meta viki o kitiems Vikipedijos projektams. Tokius rašinius gali taisyti visi, tačiau siūlytume esminius pakeitimus pirmiausia aptarti aptarimų puslapyje. Fanoharana no eto amin'ity pejy ity. Maneho ny hevitry ny mpandray anjara sasan'i Metawiki, ka mety vitsy ny mpanohana azy. Tsy manolotra fitsipika, na torohevitra ofisialy ny votoatin'ity pejy ity, fa mety ho izy eo amin'ny tetikasa Wikimedia sasany. Raha ilaina dia ovay ity pejy ity, na mikasa fanovana lehibe eo amin'ny pejin-dresany. Ова е есеј. Во него е искажано мислењето и идеите на извесни викимедијанци или корисници на Мета-Вики, но не значи дека тоа ужива широка поддршка. Ова не претставува правило на Мета-Вики, но може да виде правило или напатствие на други проекти на Викимедија. Најслободно менувајте ја страницава, или пак користете ја страницата за разговор ако сакате да предложите некои поголеми промени. ഇതൊരു പ്രബന്ധം ആണ്. വിക്കിമീഡിയയിലേയോ മെറ്റാ വിക്കിയിലേയോ ചിലരുടെ അഭിപ്രായം മാത്രം ആണ് ഇത്. ഇത് പൊതുവേ അംഗീകരിക്കപ്പെട്ടിട്ടുള്ള ഒരു മാർഗ്ഗരേഖ അല്ല. എങ്കിലും ഇതെ മറ്റേതെങ്കിലും ഒരു വിക്കിപ്പീഡിയയിലെ മാർഗ്ഗരേഖയായി കണക്കാക്കപ്പെടുന്നുണ്ടാകാം. ഈ താൾ താങ്കൾക്ക് സധൈര്യം തിരുത്താവുന്നതാണ്. എന്തെങ്കിലും മാറ്റങ്ങൾ നിർദ്ദേശിക്കാനുണ്ടെങ്കിൽ സംവാദം താളിൽ കുറിപ്പ് എഴുതുക. हा एक निबंध आहे. यामध्ये काही विकिपीडिया सदस्यांची किंवा मेटा-विकि सदस्यांची मते आणि कल्पना मांडण्यात आल्या आहेत. त्यांना बहुतांशांचा पाठिंबा असेलच असे नाही. हा निबंध मेटा-विकिवरील धोरण मांडत नाही, पण इतर काही विकिमीडिया प्रकल्पांमध्ये हा निबंध धोरण किंवा मार्गदर्शक तत्व म्हणून वापरला जात असणे शक्य आहे. आवश्यक असेल तेव्हा विनासंकोच हे पान संपादित करा किंवा काही मोठे बदल सुचविण्यासाठी चर्चा पानाचा उपयोग करा. Ini adalah sebuah karangan. Ia menyatakan pendapat serta buah fikiran sesetengah ahli wikimedia atau pengguna Meta-Wiki tetapi tidak semestinya mempunyai sokongan yang meluas. Ini bukannya polisi di Meta-Wiki, tetapi ia mungkin merupakan polisi atau garis panduan di projek-projek Wikimedia lain. Silakan mengemaskini laman ini jika perlu, atau gunakan laman perbincangannya untuk mengusulkan perubahan-perubahan yang besar. Dit is een essay. Het geeft de meningen en ideeën van enkele gebruikers op Meta-Wiki weer, maar wordt waarschijnlijk niet door iedereen gesteund. Dit is ook geen officieel beleid of richtlijn op Meta-Wiki, maar dat kan het wel zijn op andere Wikimedia-projecten. Voel u vrij om deze pagina als nodig bij te werken, of om de overlegpagina te gebruiken om grote wijzigingen voor te stellen. Dette er et essay. Det uttrykker meningene og ideene til enkelte wikimedianere eller Meta-Wiki-brukere, men har ikke nødvendivis stor støtte. Dette er ikke en retningslinje på Meta-Wiki, men kan være retningslinje på andre Wikimedia-prosjekter. Du er fri til å oppdatere siden om det trengs, eller skrive på diskusjonssiden for å foreslå større endringer. Dette er et essay. Det uttrykker meningene og ideene til enkelte wikimedianere eller Meta-Wiki-brukere, men har ikke nødvendivis stor støtte. Dette er ikke en retningslinje på Meta-Wiki, men kan være retningslinje på andre Wikimedia-prosjekter. Du er fri til å oppdatere siden om det trengs, eller skrive på diskusjonssiden for å foreslå større endringer. Aquò es una redaccion. Exprimís las opinions e las idèas d'unes contributors de MetaWiki, mas pòt rencontrar pas lo sosten dels autres. Es pas una règla o una recomandacion sus MetaWiki, mas o pòt èsser sus d'autres projèctes Wikimèdia. Esitetz pas a modificar aquesta pagina se fa mestièr, o a prepausar de cambiaments màgers sus la la pagina de discussion. Ten artykuł jest esejem. Wyrażone są w nim opinie i pomysły niektórych wikimedian lub użytkowników Meta-Wiki, ale niekoniecznie mają szersze poparcie. Nie jest to zasada obowiązująca na Meta-Wiki, ale może to być zasada lub zalecenie na innych projektach Wikimediów. Możesz aktualizować tę stronę w razie potrzeby lub skorzystaj ze strony dyskusji artykułu aby zaproponować większe zmiany. Isto é um ensaio. Ele expressa as opiniões e ideias de vários wikimedianos ou usuários do Meta-Wiki mas pode não ter grande respaldo. Isto não é uma política no Meta-Wiki, mas pode ser uma política ou orientação em outros projetos da Wikimedia. Sinta-se livre para atualizar esta página quando necessário, ou use a página de discussão para propor alterações maiores. Acesta este un eseu. Aici sînt exprimate opiniile şi ideile unor utilizatori de pe Meta-Wiki, dar este posibil să nu aibă accepţiune majoritară. Aceasta nu are titlu de politică pe Meta-Wiki, dar poate fi politică sau ghid de reguli pe alte proiecte ale Wikipediei. Poţi să îmbunătăţeşti această pagină după cum crezi adecvat, sau să foloseşti pagina de discuţie pentru a propune schimbări majore. Это эссе. Оно выражает мнения и идеи некоторых пользователей Мета-вики, но может не пользоваться широкой поддержкой. Эссе не является правилом Мета-вики, но, вероятно, может быть правилом или руководством в других проектах Викимедиа. Вы можете обновлять эту страницу как считаете нужным или воспользоваться страницей обсуждения, чтобы предложить значительные изменения. This is an essay. It expresses th' opinions 'n' ideas o' some wikimedians or Meta-Wiki users bit kin nae huv wide support. This insae policy on the Meta-Wiki, bit it kin be policy or guideline oan ither Wikimedia projects. Cop free tae update this page as needed, or uise th' collogue page page tae propose major changes. Toto je esej. Vyjadruje názory a námety niektorých wikimedianov alebo používateľov Meta-Wiki, ale nemusí mať širokú podporu. Toto nie je pravidlo Meta-Wiki, ale môže to byť pravidlo, odporúčanie či vodidlo na iných projektoch Wikimedia. Môžete túto stránku aktualizovať podľa potreby, alebo použite diskusnú stránku na návrhy väčších zmien. Ово је есеј. Садржи мисли и идеје неких корисника Мета-Викија, али не мора да буде широко прихваћен. Ово није правило на Мета-Викију, али може да буде правило или упутство на другим пројектима Викимедије. Не устручавајте се да промените ову страну по потреби или користите страну за разговор да бисте предложили веће промене. Den här sidan är en essä. Den är inte en av Wikimedias policys eller riktlinjer, och återspeglar kanske endast författarnas åsikter. Uppdatera sidan om det behövs eller diskutera innehållet på diskussionssidan. หน้านี้เป็นข้อเขียน แสดงถึงความคิดหรือไอเดียของผู้ใช้วิกิมีเดียหรือเมต้าวิกิบางคนซึ่งอาจจะยังไม่ได้รับการสนับสนุนกว้างอย่างขวางนัก นี่ไม่ใช่นโยบายบนเมต้าวิกิ, แต่อาจเป็นนโยบายหรือแนวทางของโครงการอื่น ๆ ของวิกิมีเดีย อย่ากังวลในการแก้ไขหน้านี้ตามที่คุณต้องการ หรือใช้หน้าอภิปรายในการเสนอการเปลี่ยนแปลงใหญ่ ๆ Це - есе. Воно виражає думки й ідеї деяких користувачів Мета-вікі, але може не користуватися широкою підтримкою. Есе не є правилом Мета-вікі, але, імовірно, може бути правилом або керівництвом в інших проектах Вікімедіа. Ви можете підкорегувати цю сторінку безпосередньо, якщо вважаєте за необхідно, або скористатися сторінкою обговорення, щоб запропонувати значні зміни. Đây là một bài luận. Nó thể hiện ý kiến và ý tưởng của một số thành viên Wikimedia hoặc Meta-Wiki và có thể không được đồng tình một cách rộng rãi. Đây không phải là quy định tại Meta-Wiki, nhưng nó có thể là quy định hoặc hướng dẫn tại các dự án khác của Wikimedia. Xin hãy thoải mái cập nhật trang này nếu cần, hoặc sử dụng trang thảo luận để đề xuất những thay đổi lớn. 这是一篇论述。它只表达了部分维基人或元维基使用者的意见及观点，此等观点可能未获得广泛支持。这不是元维基的政策，但可能是属于其他维基计划的政策或指引。如有需要，欢迎更新本页面，或在讨论页提出修改的建议。 这是一篇论述。它只表达了部分维基人或元维基使用者的意见及观点，此等观点可能未获得广泛支持。这不是元维基的政策，但可能是属于其他维基计划的政策或指引。如有需要，欢迎更新本页面，或在讨论页提出修改的建议。 這是一篇論述. 它只表達了部分維基人或元維基使用者的意見及觀點，此等觀點可能未獲得廣泛支持。 這不是元維基的政策，但可能是屬於其他維基計劃的政策或指引。如有需要，歡迎更新本頁面，或在討論頁提出修改的建議。 呢篇係一篇論述。佢只表達左部分維基人或者維基元使用者嘅意見同埋觀點，呢啲觀點可能未獲得廣泛支持。 呢個唔係元維基嘅政策，但可能係屬於其他維基計劃嘅政策或者指引。如果有需要，歡迎改呢版，或者係討論頁度提出修改嘅建議。 呢篇係一篇論述。佢只表達左部分維基人或者維基元使用者嘅意見同埋觀點，呢啲觀點可能未獲得廣泛支持。 呢個唔係元維基嘅政策，但可能係屬於其他維基計劃嘅政策或者指引。如果有需要，歡迎改呢版，或者係討論頁度提出修改嘅建議。 [translate]

This is a Guide to administrators of Wikimedia Foundation wikis for blocking IP version 6 addresses. Edits from IP version 6 addresses have been occurring from the World IP version 6 Launch day (2012-06-06) onwards. This guide deals with the various issues of blocking edits from such addresses with the MediaWiki blocking tool.

A quick précis:

• You'll have to recognize IP version 6 addresses properly; pseudonym accounts' usernames can resemble them.
• Range blocking for IP version 6 addresses is more complex and you'll have to know some range blocking basics.

How to recognize IP version 6 addresses

As you can see from §2.2 of RFC 4291, there is a fair degree of flexibility in the human-readable representation of an IP version 6 address. MediaWiki, being a piece of software, doesn't make use of this, for consistency purposes. All IP version 6 addresses in MediaWiki follow a regular form:

MediaWiki doesn't employ the :: abbreviations from point #2.

IP version 6 addresses always have the fully-spelled-out address, with all eight 16-bit groups and without squashing groups that are zeroes. You'll see IP addresses represented as User:2001:DB8:0:0:0:0:0:0, not User:2001:DB8::.

MediaWiki doesn't add unnecessary leading zeroes.

IP version 6 addresses will only have a zero in the first place for a 16-bit group whose value is zero. You'll see addresses spelled as User:2001:DB8:16:5:0:ACE:BD1:7BE, not User:2001:0DB8:0016:0005:0000:0ACE:0BD1:07BE.

MediaWiki uses uppercase hexadecimal.

You'll see IP version 6 addresses spelled out as User:2001:DB8:16:5:0:0:ABCD:EF00, not User:2001:db8:16:5:0:0:abcd:ef00.

If you see something that looks like an IP version 6 address, but that has :: or unnecessary leading zeroes, or that uses lowercase hexadecimal, or that lacks the full eight groups, then it's possibly a pseudonym account, not an IP address. Several pseudonym accounts have been registered (over the past decade) with names that resemble human-readable forms of IP version 6 addresses. There's a pseudonym account named User:2001:db8 on the English Wikipedia, for example, registered in 2011. Don't mistake such accounts for IP version 6 addresses.

What to block and what not to block

A short backgrounder on how IP version 6 address space is parcelled out

Congratulations! You can put more devices on your LAN, and give them IPv6 addresses, than there are Ethernet cards in existence.

— Jonathan de Boyne Pollard, 2012-01

IP version 6 addresses are 128 bits long, with the upper (most significant) $N$ bits being a prefix and the lower $128-N$ bits having a prefix-determined meaning — usually, but not always, an ID of some sort. The way that (global unicast) address space is parcelled out is as follows:

• The Internet Assigned Numbers Authority parcels out a short prefix, anywhere between 12 and 24 bits, to a Regional Internet registry (RIR) such as ARIN, APNIC, or RIPE.
• The RIR parcels out longer prefixes, commonly 32 bits in length and that begin with one of its assigned prefixes, to a Local Internet registry (LIR), which is usually an Internet Service Provider.
• The LIR parcels out even longer prefixes, anywhere between 48 and 64 bits (inclusively) and that begin with one of its assigned prefixes, to end user local area networks.

Don't rely upon stuff that's under the end-user's control.

Précis: End users have full control of everything following the prefix.

Technically, the remaining bits after the $N$-bit prefix are an interface identifier. Received wisdom is that that's a MAC address and that it's 64 bits long. Actually it isn't, for three reasons:

It isn't always, or even often, 64 bits.

All residential customers of AT&T, for example, are allocated a 60 bit prefix. So they control the bottom 68 bits of their IP version 6 addresses. Most commonly, their routers are "customer premises equipment" owned by AT&T, and the 60-bit prefix is remotely programmed into their routers by AT&T. They can theoretically have 16 LANs, with every Ethernet card in existence on each one.

The use of MAC addresses has been optional since 2001.

There's an alternative scheme for end-user machines to construct their IP version 6 addresses, that generates them in a way that is unpredictable from outside of the machine. It is outlined in Narten, Draves, and Krishnan (2007), which is itself a successor to Narten and Draves (2001).

The bottom 64 bits are (if they are generated in the pre-2001 way) a modified EUI-64 address.

It's derived from a MAC address, using a simple arithemetic transformation, but it isn't the actual MAC address. It has 16 more bits than a MAC address, for a start.

Simply put, the two forms that you'll see of the subset of IP version 6 addresses that you'll need to deal with (more on which in a following section) are:

• An IP v6 address with a "1" in bit #57 and FF:EF accross the 6th and 7th groups has a modified EUI-64 address in its bottom 64 bits. So, for example, User:2001:DB8:16:5:226:BBFF:FE12:2ACD is an IP version 6 address derived from the MAC address 00-26-BB-12-2A-CD.
• An IP v6 address with a "0" in bit #57 has been generated by an end user machine in a fashion that cannot be predicted. So, for example, User:2001:DB8:16:5:55F8:1F6C:3C60:6FD6 is an RFC 3041 address.

The whole point of this mechanism was to prevent people in exactly your situation from being able to draw a correspondence between one IP version 6 address and another, by comparing the bottom 64 bits of addresses and tracing people from place to place around Internet by their personal computers'/mobile telephones'/tablet computers' mEUI-64 addresses; and it has been around longer than any of these WMF wikis have.

Don't expect talk pages to be a reliable way to contact people.

Précis: If an end user is using a recent version of Microsoft Windows NT, they usually won't have the same user talk page for more than 7 days in a row, because their IP version 6 addresses change every 7 days.

Microsoft calls IP version 6 address generated in the RFC 3941 way "temporary address interface identifiers" (see Microsoft (2003a)). A Windows computer will calculate a new address on a regular basis. By default, that's every time that it is bootstrapped and every 7 days it is running thereafter. That means that every 7 days the bottom 64 bits will change, in a way that neither you nor anyone else apart from that machine's system administrator, can (practically) predict.

In Windows Server 2003, whose manual page was just referenced, this is a mechanism that is disabled by default, and that end-users have to turn on with the netsh interface ipv6 set privacy state=enabled command, as you can see from the manual.

In Windows Vista and Windows Server 2008, this changed. The default with Microsoft Windows is now, and has been since 2007, to use RFC 3941 by default. The use of modified EUI-64 addressing (the pre-2001 way of doing things that allows people to be traced around the Internet by their mEUI-64 addresses) is now something that has to be turned on, with the netsh interface ipv6 set global randomize­identifiers=disabled command.

Don't block "everything else".

Précis: Don't block any IP version 6 address whose most significant 16 bits (the first group of hexadecimal digits) are outside the range 2001 to 2C0F.

The only IP version 6 addresses that you'll need to block are so-called global unicast addresses. Don't block IP version 6 addresses that are not global unicast addresses. In theory, every IP version 6 address that doesn't begin with the following prefixes is a global unicast address:

• the 127-bit prefix of all zeros (0::/127)
• the 10-bit prefix 1111111010 binary (FE80::/10)
• the 8-bit prefix 11111111 binary (FF00::/8)
• the 7-bit prefix 1111110 (FC00::/7)

Do not ever block IP version 6 addresses with those prefixes.

However: In practice, now and probably for the next decade at least, IANA is only handing out prefixes that begin with the 3-bit prefix 001 binary (2000::/3). Only (approximately) one seventh of the potential global unicast addresses specified by RFC 4291 §2.4 will be in use as such by IANA. If you see an IP version 6 address whose most significant 16 bits (first 4 hexadecimal digits) are outside the range 2000 to 3FFF, then beware. Someone is mucking around. Indeed, as of 2012, IANA has not handed out any prefixes whose most significant 16 bits are outside the range 2001 to 2C0F.

Range blocking is the norm.

Précis: Always remember the /N suffix when you block, and N must be between 32 and 64, usually somewhere between 48 and 64 (inclusively) in practice.

As noted in the preceding backgrounder, LIRs parcel out prefixes ranging from 48 bits to 64 bits in length to end user customers. End users are assigned control of anywhere between the bottom 64 and the bottom 80 bits of their IP version 6 addresses. This is intentional. Whereas in the IP version 4 world LIRs handed out single IP version 4 addresses, and multiple ones only at a premium, in the IP version 6 world LIRs hand out to end users address space for at least a whole LAN (a 64 bit prefix with a 64-bit node identifier) or even multiple LANs (e.g. a 56 bit prefix with an 8 bit net ID and a 64-bit node identifier).

So it's pointless blocking a single, 128-bit, IP version 6 address. The person being blocked has more IP version 6 addresses to play with, and easily switch to, than there are Ethernet cards in existence. Range blocking is the norm, not the exception, for IP version 6, so get used to that.

The longest prefix that you'll have to range block in practice is 64 bits. As for the shortest prefix: Remember from the backgrounder that usually RIRs parcel out 32-bit prefixes to LIRs. You'll in practice never want to block anything higher up the hierarchy than an LIR (an ISP, a large business, or another large organization). If you do, you'll be range blocking entire continents. Indeed, it's rare that you'll want to block an entire LIR. So don't even consider prefix lengths shorter than 32 bits, and be very wary of considering prefix lengths shorter than 48 bits.

There's a whole load of new "sensitive" addresses to remember.

Here are some of them:

"Sensitive" IP version 6 addresses

Address(es)	Reason
2620:0:860::/46	The 46-bit prefix for IP version 6 addresses used by the Wikimedia Foundation. Bear in mind that this prefix terminates halfway through the last hexadecimal digit, so that last digit can be 0, 1, 2, or 3.
2002:1828:88FB:0:DCAD:BEFF:FEEF:202/128	Server Abscissa on ClueNet, which hosts English Wikipedia ClueBot.

Your wiki may have additional "sensitive" IP addresses that you should not block. The English Wikipedia, for example, has a list at Wikipedia:Blocking IP addresses#Sensitive IP addresses of governmental and other organizations that it would be politically embarrassing to block. Such lists will vary from wiki to wiki, according to readership, language, and other factors, and you'll need to check the specifics for the wiki that you are blocking on.

It is unfortunate that, as of June 2012, none of those wiki-local lists contain the IP version 6 addresses used by the organizations listed. So it is necessary to check first, by looking the IP version 6 address up in the various Internet Registry databases, the WWW lookup tools for some of which (depending from your wiki's administrators) may be conveniently hyperlinked on the contributions list page for the IP address. It is — alas! — also unfortunately the case that, as of June 2012, several Internet Registries do not provide IP version 6 lookup capability. So such database lookups are not as simple an exercise as is the case for IP version 4 addresses.

References

Sources used

• Number Resource Policy Manual. 2012-02-10. Version 2012.2
• R. Hinden and R. Haberman (2005). Unique Local IPv6 Unicast Addresses. RFC 4193. IETF.
• R. Hinden and S. Deering (2006). IP Version 6 Addressing Architecture. RFC 4291. IETF.
• S. Kawamura and M. Kawashima (2010). A Recommendation for IPv6 Address Text Representation. RFC 5952. IETF.
• T. Narten, G. Huston, and L. Roberts (2011-03). IPv6 Address Assignment to End Sites. BCP 157/RFC 6177. IETF.
• IANA (2012a). IPv6 Global Unicast Address Assignments. 2012-05-30.
• IANA (2012b). Internet Protocol Version 6 Address Space. 2012-05-30.
• Chase, Chris (2010-06-10). AT&T broadband transition to IPv6 using 6rd Google IPv6 Implementors Conference 2010.

Further reading

• T. Narten and R. Draves (January 2001). Privacy Extensions for Stateless Address Autoconfiguration in IPv6. RFC 3041. IETF.
• T. Narten, R. Draves, and S. Krishnan (September 2007). Privacy Extensions for Stateless Address Autoconfiguration in IPv6. RFC 4941. IETF.
• Microsoft corporation (2003). IPv6 interface identifiers. Windows Server 2003 product help.
• Davies, Joseph (2008). The Cable Guy IPv6 Autoconfiguration in Windows Vista. MSDN Magazine. Microsoft corporation.