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cloudron-firewall: add retry for xtables lock

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cloudron-firewall.sh[30679]: ==> Setting up firewall
cloudron-firewall.sh[30693]: iptables: Chain already exists.
cloudron-firewall.sh[30694]: ip6tables: Chain already exists.
cloudron-firewall.sh[30699]: ipset v7.5: Set cannot be created: set with the same name already exists
cloudron-firewall.sh[30702]: ipset v7.5: Set cannot be created: set with the same name already exists
cloudron-firewall.sh[30740]: Another app is currently holding the xtables lock. Perhaps you want to use the -w option?
This commit is contained in:
Girish Ramakrishnan
2022-02-20 17:42:20 -08:00
parent c55d1f6a22
commit 8ef5e35677
1 changed files with 25 additions and 21 deletions
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setup/start/cloudron-firewall.sh
+25 -21
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@@ -6,9 +6,13 @@ echo "==> Setting up firewall"
has_ipv6=$(cat /proc/net/if_inet6 >/dev/null 2>&1 && echo "yes" || echo "no")
# wait for 120 seconds for xtables lock, checking every 1 second
readonly iptables="iptables --wait 120 --wait-interval 1"
readonly ip6tables="ip6tables --wait 120 --wait-interval 1"
function ipxtables() {
iptables "$@"
[[ "${has_ipv6}" == "yes" ]] && ip6tables "$@"
$iptables "$@"
[[ "${has_ipv6}" == "yes" ]] && $ip6tables "$@"
}
ipxtables -t filter -N CLOUDRON || true
@@ -20,16 +24,16 @@ ipset create cloudron_blocklist6 hash:net family inet6 || true
/home/yellowtent/box/src/scripts/setblocklist.sh
iptables -t filter -A CLOUDRON -m set --match-set cloudron_blocklist src -j DROP
$iptables -t filter -A CLOUDRON -m set --match-set cloudron_blocklist src -j DROP
# the DOCKER-USER chain is not cleared on docker restart
if ! iptables -t filter -C DOCKER-USER -m set --match-set cloudron_blocklist src -j DROP; then
iptables -t filter -I DOCKER-USER 1 -m set --match-set cloudron_blocklist src -j DROP
if ! $iptables -t filter -C DOCKER-USER -m set --match-set cloudron_blocklist src -j DROP; then
$iptables -t filter -I DOCKER-USER 1 -m set --match-set cloudron_blocklist src -j DROP
fi
ip6tables -t filter -A CLOUDRON -m set --match-set cloudron_blocklist6 src -j DROP
$ip6tables -t filter -A CLOUDRON -m set --match-set cloudron_blocklist6 src -j DROP
# there is no DOCKER-USER chain in ip6tables, bug?
ip6tables -D FORWARD -m set --match-set cloudron_blocklist6 src -j DROP || true
ip6tables -I FORWARD 1 -m set --match-set cloudron_blocklist6 src -j DROP
$ip6tables -D FORWARD -m set --match-set cloudron_blocklist6 src -j DROP || true
$ip6tables -I FORWARD 1 -m set --match-set cloudron_blocklist6 src -j DROP
# allow related and establisted connections
ipxtables -t filter -A CLOUDRON -m state --state RELATED,ESTABLISHED -j ACCEPT
@@ -73,8 +77,8 @@ if [[ -f "${ldap_allowlist_json}" ]]; then
# ldap server we expose 3004 and also redirect from standard ldaps port 636
ipxtables -t nat -I PREROUTING -p tcp --dport 636 -j REDIRECT --to-ports 3004
iptables -t filter -A CLOUDRON -m set --match-set cloudron_ldap_allowlist src -p tcp --dport 3004 -j ACCEPT
ip6tables -t filter -A CLOUDRON -m set --match-set cloudron_ldap_allowlist6 src -p tcp --dport 3004 -j ACCEPT
$iptables -t filter -A CLOUDRON -m set --match-set cloudron_ldap_allowlist src -p tcp --dport 3004 -j ACCEPT
$ip6tables -t filter -A CLOUDRON -m set --match-set cloudron_ldap_allowlist6 src -p tcp --dport 3004 -j ACCEPT
fi
# turn and stun service
@@ -83,12 +87,12 @@ ipxtables -t filter -A CLOUDRON -p udp -m multiport --dports 3478,5349 -j ACCEPT
ipxtables -t filter -A CLOUDRON -p udp -m multiport --dports 50000:51000 -j ACCEPT
# ICMPv6 is very fundamental to IPv6 connectivity unlike ICMPv4
iptables -t filter -A CLOUDRON -p icmp --icmp-type echo-request -j ACCEPT
iptables -t filter -A CLOUDRON -p icmp --icmp-type echo-reply -j ACCEPT
ip6tables -t filter -A CLOUDRON -p ipv6-icmp -j ACCEPT
$iptables -t filter -A CLOUDRON -p icmp --icmp-type echo-request -j ACCEPT
$iptables -t filter -A CLOUDRON -p icmp --icmp-type echo-reply -j ACCEPT
$ip6tables -t filter -A CLOUDRON -p ipv6-icmp -j ACCEPT
ipxtables -t filter -A CLOUDRON -p udp --sport 53 -j ACCEPT
iptables -t filter -A CLOUDRON -s 172.18.0.0/16 -j ACCEPT # required to accept any connections from apps to our IP:<public port>
$iptables -t filter -A CLOUDRON -s 172.18.0.0/16 -j ACCEPT # required to accept any connections from apps to our IP:<public port>
ipxtables -t filter -A CLOUDRON -i lo -j ACCEPT # required for localhost connections (mysql)
# log dropped incoming. keep this at the end of all the rules
@@ -96,8 +100,8 @@ ipxtables -t filter -A CLOUDRON -m limit --limit 2/min -j LOG --log-prefix "Pack
ipxtables -t filter -A CLOUDRON -j DROP
# prepend our chain to the filter table
iptables -t filter -C INPUT -j CLOUDRON 2>/dev/null || iptables -t filter -I INPUT -j CLOUDRON
ip6tables -t filter -C INPUT -j CLOUDRON 2>/dev/null || ip6tables -t filter -I INPUT -j CLOUDRON
$iptables -t filter -C INPUT -j CLOUDRON 2>/dev/null || $iptables -t filter -I INPUT -j CLOUDRON
$ip6tables -t filter -C INPUT -j CLOUDRON 2>/dev/null || $ip6tables -t filter -I INPUT -j CLOUDRON
# Setup rate limit chain (the recent info is at /proc/net/xt_recent)
ipxtables -t filter -N CLOUDRON_RATELIMIT || true
@@ -127,21 +131,21 @@ done
# docker translates (dnat) 25, 587, 993, 4190 in the PREROUTING step
for port in 2525 4190 9993; do
iptables -A CLOUDRON_RATELIMIT -p tcp --syn ! -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 50 -j CLOUDRON_RATELIMIT_LOG
$iptables -A CLOUDRON_RATELIMIT -p tcp --syn ! -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 50 -j CLOUDRON_RATELIMIT_LOG
done
# msa, ldap, imap, sieve, pop3
for port in 2525 3002 4190 9993 9995; do
iptables -A CLOUDRON_RATELIMIT -p tcp --syn -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 500 -j CLOUDRON_RATELIMIT_LOG
$iptables -A CLOUDRON_RATELIMIT -p tcp --syn -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 500 -j CLOUDRON_RATELIMIT_LOG
done
# cloudron docker network: mysql postgresql redis mongodb
for port in 3306 5432 6379 27017; do
iptables -A CLOUDRON_RATELIMIT -p tcp --syn -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 5000 -j CLOUDRON_RATELIMIT_LOG
$iptables -A CLOUDRON_RATELIMIT -p tcp --syn -s 172.18.0.0/16 -d 172.18.0.0/16 --dport ${port} -m connlimit --connlimit-above 5000 -j CLOUDRON_RATELIMIT_LOG
done
iptables -t filter -C INPUT -j CLOUDRON_RATELIMIT 2>/dev/null || iptables -t filter -I INPUT 1 -j CLOUDRON_RATELIMIT
ip6tables -t filter -C INPUT -j CLOUDRON_RATELIMIT 2>/dev/null || ip6tables -t filter -I INPUT 1 -j CLOUDRON_RATELIMIT
$iptables -t filter -C INPUT -j CLOUDRON_RATELIMIT 2>/dev/null || $iptables -t filter -I INPUT 1 -j CLOUDRON_RATELIMIT
$ip6tables -t filter -C INPUT -j CLOUDRON_RATELIMIT 2>/dev/null || $ip6tables -t filter -I INPUT 1 -j CLOUDRON_RATELIMIT
# Workaround issue where Docker insists on adding itself first in FORWARD table
ipxtables -D FORWARD -j CLOUDRON_RATELIMIT || true