feat: finish converting md to org

1 files changed, 54 insertions, 40 deletions

diff --git a/blog/2023-10-15-alpine-ssh-hardening.org b/blog/2023-10-15-alpine-ssh-hardening.org
index 2ba483d..03a3ba7 100644
--- a/blog/2023-10-15-alpine-ssh-hardening.org
+++ b/blog/2023-10-15-alpine-ssh-hardening.org
@@ -1,60 +1,74 @@
-+++
-date = 2023-10-16T00:20:45+00:00
-title = "SSH Hardening for Alpine Linux"
-description = "A quick guide to hardening SSH on Alpine Linux."
-+++
-
-## Overview
+#+title: SSH Hardening for Alpine Linux
+#+date:  2023-10-16
 
+** Overview
+:PROPERTIES:
+:CUSTOM_ID: overview
+:END:
 This guide follows the standard
-[ssh-audit](https://www.ssh-audit.com/hardening_guides.html) hardening guide,
-tweaked for Alpine Linux.
-
-## Hardening Guide
+[[https://www.ssh-audit.com/hardening_guides.html][ssh-audit]] hardening
+guide, tweaked for Alpine Linux.
 
-These steps must be performed as root. You can try to use `doas` or `sudo`,
-but there may be issues.
+** Hardening Guide
+:PROPERTIES:
+:CUSTOM_ID: hardening-guide
+:END:
+These steps must be performed as root. You can try to use =doas= or
+=sudo=, but there may be issues.
 
 1. Re-generate the RSA and ED25519 keys
-```sh
+
+#+begin_src sh
 rm /etc/ssh/ssh_host_*
 ssh-keygen -t rsa -b 4096 -f /etc/ssh/ssh_host_rsa_key -N ""
 ssh-keygen -t ed25519 -f /etc/ssh/ssh_host_ed25519_key -N ""
-```
-2. Remove small Diffie-Hellman moduli
-```sh
+#+end_src
+
+2. [@2] Remove small Diffie-Hellman moduli
+
+#+begin_src sh
 awk '$5 >= 3071' /etc/ssh/moduli > /etc/ssh/moduli.safe
 mv /etc/ssh/moduli.safe /etc/ssh/moduli
-```
-3. Enable the RSA and ED25519 HostKey directives in the /etc/ssh/sshd_config
-file
-```sh
+#+end_src
+
+3. [@3] Enable the RSA and ED25519 HostKey directives in the
+   /etc/ssh/sshd_config file
+
+#+begin_src sh
 sed -i 's/^\#HostKey \/etc\/ssh\/ssh_host_\(rsa\|ed25519\)_key$/HostKey \/etc\/ssh\/ssh_host_\1_key/g' /etc/ssh/sshd_config
-```
-4. Restrict supported key exchange, cipher, and MAC algorithms
-```sh
+#+end_src
+
+4. [@4] Restrict supported key exchange, cipher, and MAC algorithms
+
+#+begin_src sh
 echo -e "\n# Restrict key exchange, cipher, and MAC algorithms, as per sshaudit.com\n# hardening guide.\nKexAlgorithms sntrup761x25519-sha512@openssh.com,curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha256\nCiphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr\nMACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,umac-128-etm@openssh.com\nHostKeyAlgorithms ssh-ed25519,ssh-ed25519-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256,rsa-sha2-256-cert-v01@openssh.com" > /etc/ssh/sshd_config.d/ssh-audit_hardening.conf
-```
-5. Include the /etc/ssh/sshd_config.d directory
-```sh
+#+end_src
+
+5. [@5] Include the /etc/ssh/sshd_config.d directory
+
+#+begin_src sh
 echo -e "Include /etc/ssh/sshd_config.d/*.conf" > /etc/ssh/sshd_config
-```
-6. Restart OpenSSH server
-```sh
-rc-service sshd restart
-```
+#+end_src
+
+6. [@6] Restart OpenSSH server
 
-## Testing SSH
+#+begin_src sh
+rc-service sshd restart
+#+end_src
 
-You can test the results with the `ssh-audit` python script.
+** Testing SSH
+:PROPERTIES:
+:CUSTOM_ID: testing-ssh
+:END:
+You can test the results with the =ssh-audit= python script.
 
-```sh
+#+begin_src sh
 pip3 install ssh-audit
 ssh-audit localhost
-```
+#+end_src
 
-If everything succeeded, the results will show as all green. If anything is
-yellow, orange, or red, you may need to tweak additional settings.
+If everything succeeded, the results will show as all green. If anything
+is yellow, orange, or red, you may need to tweak additional settings.
 
-![ssh audit](https://img.cleberg.net/blog/20231015-ssh-hardening/ssh-audit.png
-"ssh-audit")
+#+caption: ssh audit
+[[https://img.cleberg.net/blog/20231015-ssh-hardening/ssh-audit.png%20%22ssh-audit%22]]