mirror of
https://github.com/Security-Onion-Solutions/securityonion.git
synced 2025-12-06 17:22:49 +01:00
94 lines
2.3 KiB
Bash
Executable File
94 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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. /usr/sbin/so-common
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if [[ $1 =~ ^(-q|--quiet) ]]; then
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quiet=true
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fi
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before=
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after=
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reload_required=false
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print_sshd_t() {
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local string=$1
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local state=$2
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echo "${state}:"
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local grep_out
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grep_out=$(sshd -T | grep "^${string}")
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if [[ $state == "Before" ]]; then
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before=$grep_out
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else
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after=$grep_out
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fi
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echo $grep_out
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}
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print_msg() {
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local msg=$1
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if ! [[ $quiet ]]; then
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printf "%s\n" \
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"----" \
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"$msg" \
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"----" \
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""
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fi
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}
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if ! [[ $quiet ]]; then print_sshd_t "ciphers" "Before"; fi
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sshd -T | grep "^ciphers" | sed -e "s/\(3des-cbc\|aes128-cbc\|aes192-cbc\|aes256-cbc\|arcfour\|arcfour128\|arcfour256\|blowfish-cbc\|cast128-cbc\|rijndael-cbc@lysator.liu.se\)\,\?//g" >> /etc/ssh/sshd_config
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if ! [[ $quiet ]]; then
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print_sshd_t "ciphers" "After"
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echo ""
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fi
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if [[ $before != $after ]]; then
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reload_required=true
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fi
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if ! [[ $quiet ]]; then print_sshd_t "kexalgorithms" "Before"; fi
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sshd -T | grep "^kexalgorithms" | sed -e "s/\(diffie-hellman-group14-sha1\|ecdh-sha2-nistp256\|diffie-hellman-group-exchange-sha256\|diffie-hellman-group1-sha1\|diffie-hellman-group-exchange-sha1\|ecdh-sha2-nistp521\|ecdh-sha2-nistp384\)\,\?//g" >> /etc/ssh/sshd_config
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if ! [[ $quiet ]]; then
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print_sshd_t "kexalgorithms" "After"
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echo ""
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fi
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if [[ $before != $after ]]; then
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reload_required=true
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fi
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if ! [[ $quiet ]]; then print_sshd_t "macs" "Before"; fi
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sshd -T | grep "^macs" | sed -e "s/\(hmac-sha2-512,\|umac-128@openssh.com,\|hmac-sha2-256,\|umac-64@openssh.com,\|hmac-sha1,\|hmac-sha1-etm@openssh.com,\|umac-64-etm@openssh.com,\|hmac-sha1\)//g" >> /etc/ssh/sshd_config
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if ! [[ $quiet ]]; then
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print_sshd_t "macs" "After"
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echo ""
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fi
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if [[ $before != $after ]]; then
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reload_required=true
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fi
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if ! [[ $quiet ]]; then print_sshd_t "hostkeyalgorithms" "Before"; fi
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sshd -T | grep "^hostkeyalgorithms" | sed "s|ecdsa-sha2-nistp256,||g" | sed "s|ssh-rsa,||g" >> /etc/ssh/sshd_config
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if ! [[ $quiet ]]; then
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print_sshd_t "hostkeyalgorithms" "After"
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echo ""
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fi
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if [[ $before != $after ]]; then
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reload_required=true
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fi
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if [[ $reload_required == true ]]; then
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print_msg "Reloading sshd to load config changes..."
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systemctl reload sshd
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fi
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{% if grains['os'] != 'CentOS' %}
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print_msg "[ WARNING ] Any new ssh sessions will need to remove and reaccept the ECDSA key for this server before reconnecting."
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{% endif %}
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