From 7e58b46b049eab4438245e4d7afb1683e2ed6c5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=96zcan=20O=C4=9Fuz?= <ozcan@ozgurlesin.org>
Date: Wed, 22 Jul 2020 21:08:28 +0300
Subject: [PATCH] Add Let's Encrypt

---
 #CONTRIBUTING.md#                |  25 ++++++++++++++++
 README.md~                       |  34 +++++++++++++++++++++
 src/SUMMARY.md                   |   2 +-
 src/ag_guvenligi/certbot.png     | Bin 0 -> 15767 bytes
 src/ag_guvenligi/letsencrypt.md  |  50 +++++++++++++++++++++++++++++++
 src/ag_guvenligi/letsencrypt.svg |  38 +++++++++++++++++++++++
 6 files changed, 148 insertions(+), 1 deletion(-)
 create mode 100644 #CONTRIBUTING.md#
 create mode 100644 README.md~
 create mode 100644 src/ag_guvenligi/certbot.png
 create mode 100644 src/ag_guvenligi/letsencrypt.md
 create mode 100644 src/ag_guvenligi/letsencrypt.svg

diff --git a/#CONTRIBUTING.md# b/#CONTRIBUTING.md#
new file mode 100644
index 0000000..e2780b2
--- /dev/null
+++ b/#CONTRIBUTING.md#
@@ -0,0 +1,25 @@
+# Nasıl katkı verebilirim?
+
+Güvenlik rehberine katkı vermek istiyorsanız, aşağıdaki yönergeyi takip edebilirsiniz.
+
+* Öncelikle git.oyd.org.tr üzerinde bir kullanıcı hesabı oluşturun.
+* Depoyu çatallayın, "Çatalla" düğmesi sağ üst köşededir.
+* Kendi deponuzu yerelinize klonlayın. SSH anahtarınızı eklemeniz şiddetle tavsiye edilir. SSH anahtarınızı sağ üstteki avatarınıza tıklayıp, "Ayarlar" menüsündeki "SSH/GPG Anahtarları" adımından ekleyebilirsiniz. SSH kullanmazsanız, her işleminizde tekrardan parola girmeniz gerekecektir.
+
+```
+git clone git@git.oyd.org.tr:kullanici_adi/guvenlik # SSH ile
+git clone https://git.oyd.org.tr/kullanici_adi/guvenlik.git # HTTPS ile
+```
+
+* Güvenlik rehberi, [mdBook](https://github.com/rust-lang/mdbook) kullanmaktadır. mdBook'u nasıl kurabileceğinizi README dosyasından öğrenebilirsiniz.
+* İlgili değişiklikleri yaptıktan sonra, depo ana dizininde aşağıdaki komutu çalıştırıp, web tarayıcınızdan https://127.0.0.1:3000 adresine giderek değişikliklerinizin doğru olduğuna emin olun:
+
+```
+mdbook serve
+```
+
+
+* Değişikliklerinizi göndermek için, web tarayıcınızdan ana depoya gidip, "Değişiklik istekleri" kısmına girin.
+* "Yeni değişiklik isteği" düğmesine basın, değişiklik ayrıntılarını girip değişiklik isteğinizi açın.
+
+
diff --git a/README.md~ b/README.md~
new file mode 100644
index 0000000..48821bb
--- /dev/null
+++ b/README.md~
@@ -0,0 +1,34 @@
+# Özgür Yazılım Derneği Güvenlik Rehberi
+
+Bu depo, [https://guvenlik.oyd.org.tr] adresinde bulunan Güvenlik Rehberi'ni içerir. 
+
+## Kullanım ve test
+
+Güvenlik Rehberi, [mdBook](https://github.com/rust-lang/mdBook) ile oluşturulmuştur. 
+
+mdBook kurulumu:
+
+```
+wget https://github.com/rust-lang/mdBook/releases/download/v0.4.1/mdbook-v0.4.1-x86_64-unknown-linux-gnu.tar.gz -o mdbook.tar.gz
+tar xzvf mdbook.tar.gz
+sudo mv mdbook /usr/local/bin/
+```
+
+Yerel test:
+
+```
+git clone https://git.oyd.org.tr/oyd/guvenlik.git
+cd guvenlik
+mdbook serve
+```
+
+Deployment:
+
+## Katkıda bulunanlar
+
+TODO
+
+## Lisans
+
+
+[![CC BY-SA 4.0][https://licensebuttons.net/l/by-sa/4.0/88x31.png]][http://creativecommons.org/licenses/by-sa/4.0/]
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index c592b1f..612c68f 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -23,7 +23,7 @@
 - [Ağ Güvenliği](ag_guvenligi/README.md)
   - [Güvenli Bağlantılar](ag_guvenligi/guvenli_baglantilar.md)
   - [Güvenli Web Gezintisi](ag_guvenligi/guvenli_web_gezintisi.md)
-  - [Sertifikalar](ag_guvenligi/sertifikalar.md)
+  - [Let's Encrypt](ag_guvenligi/letsencrypt.md)
   - [StartTLS](ag_guvenligi/starttls.md)
   - [Tor](ag_guvenligi/tor.md)
   - [Vpn](ag_guvenligi/vpn/vpn.md)
diff --git a/src/ag_guvenligi/certbot.png b/src/ag_guvenligi/certbot.png
new file mode 100644
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diff --git a/src/ag_guvenligi/letsencrypt.md b/src/ag_guvenligi/letsencrypt.md
new file mode 100644
index 0000000..bd359a6
--- /dev/null
+++ b/src/ag_guvenligi/letsencrypt.md
@@ -0,0 +1,50 @@
+# Let's Encrypt
+
+![Let's Encrypt](letsencrypt.svg)  
+**Let's Encrypt**, kar amacı gütmeyen bir _sertifika otoritesidir_. Let's Encrypt sayesinde ücretsiz olarak SSL/TLS sertifikası edinebilirsiniz.
+
+SSL/TLS sertifikaları, normalde ortak olarak kabul edilmiş bilinen sertifika otoriteleri tarafından belirli bir ücret karşılığında edinilebilirdi. Let's Encrypt, SSL/TLS sertifikalarını herkes için erişilebilir hale getirmiştir. 2020 Şubat ayı itibarıyla, Let's Encrypt **1 milyar** sertifika dağıtmıştır. Firefox istatistiklerine göre, Let's Encrypt'ten önce erişilen web sitelerinin yalnızca %26'sı SSL/TLS sertifikasına sahipken, bugün bu oran %85'e ulaşmıştır. [^1]
+
+## Let's Encrypt ile SSL/TLS sertifikası almak
+
+Let's Encrypt ile sertifika edinmek için, [EFF](https://eff.org) tarafından geliştirilen [CertBot](https://certbot.eff.org) aracını kullanabilirsiniz. 
+
+CertBot, sertifikanızı otomatik olarak oluşturup gereken web sunucunuza kuracaktır.
+
+Öncelikle <https://certbot.eff.org> adresine girip, alt kısımda bulunan menüden web sunucunuzu ve kullandığınız işletim sistemini/dağıtımı seçin.
+
+**Not:** _Bu noktadan itibaren, Ubuntu üzerinde Nginx kullandığınız varsayılacaktır._
+
+![CertBot menü](certbot.png)
+
+Daha sonra gelen sayfadaki yönergeleri takip edebilirsiniz. 
+
+Sunucunuza SSH ile bağlandıktan sonra, sırasıyla aşağıdaki komutları çalıştırın:
+
+```
+sudo apt-get update
+sudo apt-get install software-properties-common
+sudo add-apt-repository universe
+sudo apt-get update
+sudo apt-get install certbot python3-certbot-nginx
+```
+
+Certbot sisteminize kurulacaktır. Nginx üzerindeki web sitenizin yapılandırmasında, `server_name`'inizin doğru ayarlandığına emin olun. Ayrıca, alan adınızın A kaydının Certbot'u çalıştırdığınız sunucuya yönlenmiş olduğuna emin olun.
+
+Daha sonra aşağıdaki komut ile Certbot'u çalıştırın:
+
+`sudo certbot --nginx`
+
+Certbot, size bir e-posta adresi soracaktır. Bu e-posta adresine, yenilenemeyen sertifikalarınızla ilgili bilgilendirmeler gönderilecektir. E-postanızı yazdıktan sonra, EFF bültenini almak isteyip istemediğiniz sorulacaktır, tercihinize göre cevaplayıp devam ettiğinizde Nginx yapılandırma dosyalarınızda bulunan alan adlarınız listelenecektir. 
+
+Bir sertifikaya, birden fazla alan adı tanımlanabilmektedir. Ama bu noktada, alan adlarınızdan herhangi birisi eğer düşerse, sertifikanızın yenilenmeyeceğini unutmayın. Dolayısıyla sadece alt alan adlarını tek sertifikada toplamanız tavsiye edilmektedir.
+
+Çıkan listedeki alan adlarının numaralarını virgülle ayırarak yazın, sertifikanız oluşturulacaktır.
+
+Bu noktada, alan adınızın varsayılan olarak HTTPS'e yönlendirmek isteyip istemediğinizi soracaktır. Özel bir sebebiniz yoksa, `2` yazarak yönlendirme yapmanız şiddetle tavsiye edilir.
+
+Tüm bu adımları tamamladığınızda, SSL/TLS sertifikanız oluşturulmuş olacak. Web tarayıcınıza <https://alanadiniz.tld> girerek sertifikanızın çalışıp çalışmadığını doğrulayabilirsiniz.
+
+Sertifikanız 90 gün süreyle verilir ve Certbot tarafından otomatik olarak yenilenir. Tebrik ederiz!
+ 
+[^1]: https://letsencrypt.org/stats/
diff --git a/src/ag_guvenligi/letsencrypt.svg b/src/ag_guvenligi/letsencrypt.svg
new file mode 100644
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