diff options
| -rwxr-xr-x | roles/common/files/usr/local/sbin/update-firewall.sh | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/roles/common/files/usr/local/sbin/update-firewall.sh b/roles/common/files/usr/local/sbin/update-firewall.sh index 36c12c6..8ef3ab9 100755 --- a/roles/common/files/usr/local/sbin/update-firewall.sh +++ b/roles/common/files/usr/local/sbin/update-firewall.sh @@ -254,7 +254,7 @@ run() { # DROP bogus TCP packets. iptables -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j DROP iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROP - iptables -A INPUT -p tcp \! --syn -m state --state NEW -j DROP + iptables -A INPUT -p tcp \! --syn -m state --state NEW -j REJECT --reject-with tcp-reset # Allow all input/output to/from the loopback interface. local localhost=$(inet46 $f '127.0.0.1/8' '::1/128') @@ -299,8 +299,8 @@ run() { while read dir proto dport sport; do # We add two entries per config line: we need to accept the new # connection, and latter the reply. - local stNew=NEW,ESTABLISHED - local stEst=ESTABLISHED + local stNew=NEW,ESTABLISHED,RELATED + local stEst=ESTABLISHED,RELATED # In-Out means full-duplex [[ "$dir" =~ ^inout ]] && stEst="$stNew" @@ -327,7 +327,15 @@ run() { iptables $iptNew $if -p $proto $optsNew -m state --state $stNew -j ACCEPT iptables $iptEst $if -p $proto $optsEst -m state --state $stEst -j ACCEPT done - iptables -A OUTPUT -o $if -j REJECT + + iptables -A OUTPUT -o $if -p tcp -j REJECT --reject-with tcp-reset + iptables -A OUTPUT -o $if -p udp -j REJECT --reject-with port-unreach + if [ "$f" = "4" ]; then + iptables -A OUTPUT -o $if -p icmp -j REJECT --reject-with icmp-host-unreachable + iptables -A OUTPUT -o $if -j REJECT --reject-with icmp-host-prohibited + else + iptables -A OUTPUT -o $if -j REJECT + fi ######################################################################## commit |