From 7f15b61f23f589c8a3afc3ec5f75c3b5e8b3a0ca Mon Sep 17 00:00:00 2001
From: David Kebler <dgkebler@gmail.com>
Date: Sat, 3 Aug 2024 14:51:11 -0700
Subject: [PATCH] add new module sshd-dns which can process sshd conf files
 substituing IPs for hostnames

---
 modules/sshd-dns.mod | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 modules/sshd-dns.mod

diff --git a/modules/sshd-dns.mod b/modules/sshd-dns.mod
new file mode 100644
index 0000000..3de79e1
--- /dev/null
+++ b/modules/sshd-dns.mod
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+sshd_dns () {
+local dir	
+local dnsconf
+local conf
+dir=${1:-"/etc/ssh/sshd_config.d"}
+pushd "$dir" 1>/dev/null || return;
+for dnsconf in *.conf.dns; do
+    [[ -f "$dnsconf" ]] || break
+    conf=$(basename $dnsconf .dns)
+    echo "----- processing sshd file $dnsconf to $conf ----"
+    sudo cp $dnsconf $conf
+    cat $conf
+    echo -e "\n------------"
+	for host in $(sed -e 's/[ ,]/\n/g' $conf | sed -n 's/[Dd][Nn][Ss]://p'); do
+	echo found host $host, substituting $(dig +short $host) 
+	sudo sed -i 's/[Dd][Nn][Ss]:'$host'/'$(dig +short $host)'/g' $conf
+	done
+    echo "----- created sshd conf file $conf ----"
+    cat $conf
+    echo -e "\n------------"
+  done
+echo restart ssh service daemon to enable these changes  
+popd 1>/dev/null || return 
+
+}
+
+
+