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Code Issues Releases Activity

Added remote Bad ASN Check for Spamhaus DNSBL

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This commit is contained in:
DerLinkman 2023-07-28 20:33:12 +02:00
commit 020cb21b35
3 changed files with 64 additions and 13 deletions
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37
data/Dockerfiles/postfix/postfix.sh
View File

@ -393,6 +393,7 @@ query = SELECT goto FROM spamalias
AND validity >= UNIX_TIMESTAMP()
EOF
echo -e "\e[33mChecking if ASN for your IP is listed for Spamhaus Bad ASN List...\e[0m"
if [ -n "$SPAMHAUS_DQS_KEY" ]; then
echo -e "\e[32mDetected SPAMHAUS_DQS_KEY variable from mailcow.conf...\e[0m"
echo -e "\e[33mUsing DQS Blocklists from Spamhaus!\e[0m"
@ -431,7 +432,8 @@ if [ -n "$SPAMHAUS_DQS_KEY" ]; then
EOF
else
if curl -s http://fuzzy.mailcow.email/asn_list.txt | grep $(whois -h whois.radb.net $(curl -s http://ipv4.mailcow.email) | grep -i origin | tr -s " " | cut -d " " -f2 | head -1) > /dev/null; then
response=$(curl --connect-timeout 15 --retry 5 --max-time 30 -s -o /dev/null -w "%{http_code}" "https://asn-check.mailcow.email")
if [ "$response" -eq 403 ]; then
echo -e "\e[31mThe AS of your IP is listed as a banned AS from Spamhaus!\e[0m"
echo -e "\e[33mNo SPAMHAUS_DQS_KEY found... Skipping Spamhaus blocklists entirely!\e[0m"
cat <<EOF > /opt/postfix/conf/dns_blocklists.cf
@ -461,7 +463,7 @@ else
dnsbl.sorbs.net=127.0.0.6*2
dnsbl.sorbs.net=127.0.0.9*2
EOF
else
elif [ "$response" -eq 200 ]; then
echo -e "\e[32mThe AS of your IP is NOT listed as a banned AS from Spamhaus!\e[0m"
echo -e "\e[33mUsing the open Spamhaus blocklists.\e[0m"
cat <<EOF > /opt/postfix/conf/dns_blocklists.cf
@ -495,6 +497,37 @@ EOF
zen.spamhaus.org=127.0.0.3*4
zen.spamhaus.org=127.0.0.2*3
EOF
else
echo -e "\e[31mWe couldn't determine your AS... (maybe DNS/Network issue?) Response Code: $response\e[0m"
echo -e "\e[33mDeactivating Spamhaus DNS Blocklists to be on the safe site!\e[0m"
cat <<EOF > /opt/postfix/conf/dns_blocklists.cf
# Autogenerated by mailcow
postscreen_dnsbl_sites = wl.mailspike.net=127.0.0.[18;19;20]*-2
hostkarma.junkemailfilter.com=127.0.0.1*-2
list.dnswl.org=127.0.[0..255].0*-2
list.dnswl.org=127.0.[0..255].1*-4
list.dnswl.org=127.0.[0..255].2*-6
list.dnswl.org=127.0.[0..255].3*-8
ix.dnsbl.manitu.net*2
bl.spamcop.net*2
bl.suomispam.net*2
hostkarma.junkemailfilter.com=127.0.0.2*3
hostkarma.junkemailfilter.com=127.0.0.4*2
hostkarma.junkemailfilter.com=127.0.1.2*1
backscatter.spameatingmonkey.net*2
bl.ipv6.spameatingmonkey.net*2
bl.spameatingmonkey.net*2
b.barracudacentral.org=127.0.0.2*7
bl.mailspike.net=127.0.0.2*5
bl.mailspike.net=127.0.0.[10;11;12]*4
dnsbl.sorbs.net=127.0.0.10*8
dnsbl.sorbs.net=127.0.0.5*6
dnsbl.sorbs.net=127.0.0.7*3
dnsbl.sorbs.net=127.0.0.8*2
dnsbl.sorbs.net=127.0.0.6*2
dnsbl.sorbs.net=127.0.0.9*2
EOF
fi
fi

28
generate_config.sh
View File

@ -21,7 +21,7 @@ if grep --help 2>&1 | head -n 1 | grep -q -i "busybox"; then echo "BusyBox grep
if cp --help 2>&1 | head -n 1 | grep -q -i "busybox"; then echo "BusyBox cp detected, please install coreutils, \"apk add --no-cache --upgrade coreutils\""; exit 1; fi
if sed --help 2>&1 | head -n 1 | grep -q -i "busybox"; then echo "BusyBox sed detected, please install gnu sed, \"apk add --no-cache --upgrade sed\""; exit 1; fi
for bin in openssl curl docker git awk sha1sum grep cut whois; do
for bin in openssl curl docker git awk sha1sum grep cut; do
if [[ -z $(which ${bin}) ]]; then echo "Cannot find ${bin}, exiting..."; exit 1; fi
done
@ -59,19 +59,29 @@ else
fi
detect_bad_asn() {
if curl -s http://fuzzy.mailcow.email/asn_list.txt | grep $(whois -h whois.radb.net $(curl -s http://ipv4.mailcow.email) | grep -i origin | tr -s " " | cut -d " " -f2 | head -1) > /dev/null; then
if ! $SPAMHAUS_DQS_KEY; then
echo -e "\e[31mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS blocklists for Postfix."
echo -e "\e[31mmailcow did not detected a value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf!"
echo -e "\e[33mDetecting if your IP is listed on Spamhaus Bad ASN List...\e[0m"
response=$(curl --connect-timeout 15 --retry 5 --max-time 30 -s -o /dev/null -w "%{http_code}" "https://asn-check.mailcow.email")
if [ "$response" -eq 403 ]; then
if [ -z "$SPAMHAUS_DQS_KEY" ]; then
echo -e "\e[33mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS public blocklists for Postfix.\e[0m"
echo -e "\e[33mmailcow did not detected a value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf!\e[0m"
sleep 2
echo ""
echo -e "\e[33mTo use the Spamhaus DNS Blocklists again, you will need to create a FREE account for their Data Query Service (DQS) at: https://www.spamhaus.com/free-trial/sign-up-for-a-free-data-query-service-account\e[0m"
echo -e "\e[33mOnce done, enter your DQS API key in mailcow.conf and mailcow will do the rest for you!\e[0m"
echo ""
echo -e "\e[31mTo use the Spamhaus DNS Blocklists again, you will need to create a FREE account for their Data Query Service (DQS) at: https://www.spamhaus.com/free-trial/sign-up-for-a-free-data-query-service-account"
echo -e "\e[31mOnce done, enter your DQS API key in mailcow.conf and mailcow will do the rest for you!"
sleep 2
else
echo -e "\e[31mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS blocklists for Postfix."
echo -e "\e[33mmailcow detected a Value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf. Postfix will use DQS with the given API key..."
echo -e "\e[33mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS public blocklists for Postfix.\e[0m"
echo -e "\e[32mmailcow detected a Value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf. Postfix will use DQS with the given API key...\e[0m"
fi
elif [ "$response" -eq 200 ]; then
echo -e "\e[33mCheck completed! Your IP is \e[32mclean\e[0m"
elif [ "$response" -eq 429 ]; then
echo -e "\e[33mCheck completed! \e[31mYour IP seems to be rate limited on the ASN Check service... please try again later!\e[0m"
else
echo -e "\e[31mCheck failed! \e[0mMaybe a DNS or Network problem?\e[0m"
fi
}

12
update.sh
View File

@ -256,7 +256,9 @@ fi
}
detect_bad_asn() {
if curl -s http://fuzzy.mailcow.email/asn_list.txt | grep $(whois -h whois.radb.net $(curl -s http://ipv4.mailcow.email) | grep -i origin | tr -s " " | cut -d " " -f2 | head -1) > /dev/null ; then
echo -e "\e[33mDetecting if your IP is listed on Spamhaus Bad ASN List...\e[0m"
response=$(curl --connect-timeout 15 --retry 5 --max-time 30 -s -o /dev/null -w "%{http_code}" "https://asn-check.mailcow.email")
if [ "$response" -eq 403 ]; then
if [ -z "$SPAMHAUS_DQS_KEY" ]; then
echo -e "\e[33mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS public blocklists for Postfix.\e[0m"
echo -e "\e[33mmailcow did not detected a value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf!\e[0m"
@ -271,6 +273,12 @@ detect_bad_asn() {
echo -e "\e[33mYour server's public IP uses an AS that is blocked by Spamhaus to use their DNS public blocklists for Postfix.\e[0m"
echo -e "\e[32mmailcow detected a Value for the variable SPAMHAUS_DQS_KEY inside mailcow.conf. Postfix will use DQS with the given API key...\e[0m"
fi
elif [ "$response" -eq 200 ]; then
echo -e "\e[33mCheck completed! Your IP is \e[32mclean\e[0m"
elif [ "$response" -eq 429 ]; then
echo -e "\e[33mCheck completed! \e[31mYour IP seems to be rate limited on the ASN Check service... please try again later!\e[0m"
else
echo -e "\e[31mCheck failed! \e[0mMaybe a DNS or Network problem?\e[0m"
fi
}
@ -320,7 +328,7 @@ umask 0022
unset COMPOSE_COMMAND
unset DOCKER_COMPOSE_VERSION
for bin in curl docker git awk sha1sum grep cut whois; do
for bin in curl docker git awk sha1sum grep cut; do
if [[ -z $(command -v ${bin}) ]]; then
echo "Cannot find ${bin}, exiting..."
exit 1;