From 41d9636d16f8e59ac1362e1a37f1ec120b9c8438 Mon Sep 17 00:00:00 2001 From: Bob Mottram Date: Sun, 23 Feb 2014 21:19:53 +0000 Subject: [PATCH] Drop UDP --- beaglebone.txt | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/beaglebone.txt b/beaglebone.txt index 66b6660d..7ad0b204 100644 --- a/beaglebone.txt +++ b/beaglebone.txt @@ -462,8 +462,8 @@ Set the following properties: TCP_PORTS="1,7,9,11,15,79,109,110,111,119,138,139,512,513,514,515,540,635,1080,1524,2000,2001,4000,4001,5742,6000,6001,6667,12345,12346,20034,27665,30303,32771,32772,32773,32774,31337,40421,40425,49724,54320" UDP_PORTS="1,7,9,66,67,68,69,111,137,138,161,162,474,513,517,518,635,640,641,666,700,2049,31335,27444,34555,32770,32771,32772,32773,32774,31337,54321" -ADVANCED_EXCLUDE_TCP="113,139,70,80,443,143,6670,5060,5061,25,465,22,5222,5223,5269,5280,5281,8444" -ADVANCED_EXCLUDE_UDP="520,138,137,67,70,80,443,143,6670,5060,5061,25,465,22,5222,5223,5269,5280,5281,8444" +ADVANCED_EXCLUDE_TCP="113,139,70,80,443,143,6670,993,5060,5061,25,465,22,5222,5223,5269,5280,5281,8444" +ADVANCED_EXCLUDE_UDP="520,138,137,67,70,80,443,143,6670,993, 5060,5061,25,465,22,5222,5223,5269,5280,5281,8444" SCAN_TRIGGER="2" @@ -511,10 +511,14 @@ iptables -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP # Incoming malformed NULL packets: iptables -A INPUT -p tcp --tcp-flags ALL NONE -j DROP -# limit ssh logins to no more than 3 per min +# drop UDP to used ports +iptables -A INPUT -p udp --match multiport --dports 70,80,443,143,6670,993,5060,5061,25 -j DROP +iptables -A INPUT -p udp --match multiport --dports 465,22,5222,5223,5269,5280,5281,8444 -j DROP + +# limit ssh logins iptables -A INPUT -p tcp --dport 22 -m limit --limit 3/minute --limit-burst 1 -j ACCEPT -# Limit web connections to 20 per min +# Limit web connections iptables -A INPUT -p tcp --dport 80 -m limit --limit 10/minute --limit-burst 1 -j ACCEPT iptables -A INPUT -p tcp --dport 443 -m limit --limit 10/minute --limit-burst 1 -j ACCEPT @@ -529,6 +533,7 @@ iptables -A INPUT -p tcp --dport 70 -m limit --limit 10/minute --limit-burst 1 - # Limit IMAP connections iptables -A INPUT -p tcp --dport 143 -m limit --limit 10/minute --limit-burst 1 -j ACCEPT +iptables -A INPUT -p tcp --dport 993 -m limit --limit 10/minute --limit-burst 1 -j ACCEPT # Limit SIP connections iptables -A INPUT -p tcp --dport 5060:5061 -m limit --limit 10/minute --limit-burst 1 -j ACCEPT