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linux自动屏蔽IP工具
另存为 firewall.sh 给执行的权限 XHYVcwmDz- MB!$s_~o#L #!/bin/sh ~]C m
# this program is used to check tcp/ip connections /5r!Fhx # and block those ip with excessive connections tY0C& u2 Y4,LXuQ # my version Uv%?z0F<C myver="1.0RC1" |iGfWJ^+
HN~ # wake up every 120s if last check found abuse client /p7-D; wakeup_time_min=120 KV]8
o' d!#qBn$*[ # wake up every 300s if last check found no abuse client Hl b%/& wakeup_time_max=300 HRF;qR9v qJq2Z.>hy # rule timeout 3600s pqnZ:'V rule_timeout=3600 #b5V/)K U]W+ers # check port list E'wJ+X9 + portlist="80" #azD&6` uwhb-.w # max established connection per ip 9Netnzv% max_active_conn=8 ZI NqIfc iR6w
) # iptables chain name 3|9
U`@ iptables_chain_name="RH-Lokkit-0-50-INPUT" kSq1Q#Bxq Qz9*o # log facility z-;2)RkV2 log_facility="local0" 0OAHD ' RT$.r5l_@ # Block policy ~.L\f%< ipchains_block_policy="DENY" '98 0. iptables_block_policy="REJECT" wR*>9LjeG (S=RFd # myself )[d>?%vfd myself=`basename $0` 2c4x=% 4 g}'/ mylogger_info() ?O.1HEr { <C6*-j1oz logger -p $log_facility.info -t $myself $@ 2>/dev/null s+l3]Hd } 6
x 8P}? ERQc1G]3Dd mylogger_debug() :^[HDI-[2 { Ccx1#^` logger -p $log_facility.debug -t $myself $@ 2>/dev/null b w2KD7 } X
cDu&6Dy jt? .g' mylogger_notice() M)v4>Rw+ { %=GF logger -p $log_facility.notice -t $myself $@ 2>/dev/null ;%_s4 } MrGq{,6C h.ln%6:d dotimeout() 7\xGMC
ctM { .vJlTg mylogger_info "reset firewall when timeout arrives" OqcM3# case "$firewall" in ~R!M.gY[rK ipchains) ]#*S. r] /etc/init.d/ipchains restart 1>/dev/null 2>/dev/null 5gZ6H/. if [ $? = 0 ] ; then <*'%Xgm mylogger_info "ipchains restarted" f}C$!Lhs else o&Vti"fpC mylogger_notice "ipchains restart failed" 2uln)] fi O7of9F~" ;; b2<((H iptables) *@1(!A /etc/init.d/iptables restart 1>/dev/null 2>/dev/null 6J""gyK. if [ $? = 0 ] ; then E@(nKe&6T_ mylogger_info "iptables restarted" jr`;H else <Mq vGXI mylogger_notice "iptables restart failed" V }?MP-.c fi XGCjB{IV ;; yPXa *) %UXmWXF4$ mylogger_notice "neither ipchains nor iptables" fb*h.6^y9 ;; :H(w
W
esac H,q-*Kk 9m+ejTK{U } !-cK@>.pE 1&.q#,EMn( blockclient() N7 ox#=g { ,%X"Caz if [ -z "$1" ] || [ -z "$2" ]; then WM8])}<
L mylogger_notice "blockclient() missing client or port to block" &)ED||r, return .:I^O[k fi Q*54!^l+_r local ip port vKFEA7 lK%)a +2 ip=$1 ;BmPP, port=$2 VYw<8AEFY !~_6S*~ case "$firewall" in ym;I(TC+ ipchains) V
M{Sng mylogger_notice "blocking $1 to $2 via ipchains" lKBI3oYn found=`ipchains -nL | egrep "^$ipchains_block_policy.*[[:space:]]+$ip[[:space:]]+.*[[:space:]]+\->[[:space:]]+$port"` Y1-=H)G if [ -z "$found" ] ; then m`9P5[m#x> cmd="ipchains -I input 1 -p tcp -s $ip -d 0/0 $port -j $ipchains_block_policy 1>/dev/null 2>/dev/null" m}32ovpw mylogger_debug "cmd: $cmd" +#Ga}eCM `ipchains -I input 1 -p tcp -s $ip -d 0/0 $port -j $ipchains_block_policy 1>/dev/null 2>/dev/null` 6ee1^> if [ $? != 0 ] ; then [5;_XMj% mylogger_notice "$cmd call failed" /:ju/~R} return 4K0Fc^- fi ?`3G5at)9f new_block=1 y3Ul}mVhA ever_block=1 C
{G647 else l{8t;!2t mylogger_info "$ip already blocked to $port" Z5`
U+ ( fi [H=l#W@ ;; ?OBB)hj iptables) G7k.YtW mylogger_notice "blocking $1 to $2 via iptables" :a*F>S! found=`iptables -nL | egrep "^$iptables_block_policy.*[[:space:]]+$ip[[:space:]]+.*[[:space:]]+dpt:$port[[:space:]]+"` Z|BOuB^ if [ -z "$found" ] ; then 5|g#>sx>`q cmd="iptables -I $iptables_chain_name 1 -p tcp -m tcp -s $ip --dport $port -j $iptables_block_policy 1>/dev/null 2>/dev/null" !|-:"hE1h mylogger_debug "cmd: $cmd" J:dNV<A^ `iptables -I $iptables_chain_name 1 -p tcp -m tcp -s $ip --dport $port -j $iptables_block_policy 1>/dev/null 2>/dev/null` (AT)w/ if [ $? != 0 ] ; then :auq#$B mylogger_notice "$cmd call failed" NC%)SG \ return yJ2A!id fi s@K #M new_block=1 [(iJj3s! ever_block=1 66'AaA;0^i else V&R_A | |