鐃緒申鐃緒申
鐃緒申鐃緒申文鐃熟では￥申iptables鐃緒申箸辰鐃緒申僖鐃緒申奪肇侫鐃緒申襯随申鐃藷グの器申単鐃緒申鐃緒申鐃緒申了鐃緒申鐃緒申鐃述介してわ申鐃殉わ申鐃緒申鐃術ワ申鐃獣トフワ申鐃暑タ鐃緒申鵐阿亮尊櫃留鐃緒申僂亡悗鐃緒申討漏銅鐃緒申鐃緒申鐃叔わ申鬚�種申蠅�鐃緒申鐃緒申鐃緒申鐃緒申筆鐃峻は逸申鐃准わ申鐃緒申任鐃緒申鐃初い鐃殉わ申鐃藷。まわ申鐃緒申鐃銃は￥申2001年10鐃庶現鐃淳のわ申里任鐃緒申鐃緒申膿鐃緒申両鐃緒申鐃緒申鐃緒せ鐃銃種申鐃緒申鐃緒申鐃暑こ鐃夙をおわ申鐃緒申鐃潤し鐃殉わ申鐃緒申
鐃旬種申
鐃緒申鐃緒申鐃緒申鐃銃ワ申鐃緒申佑鐃緒申董鐃�ssh鐃緒申tcp_wrapper鐃緒申箸辰討鐃緒申襦�鐃夙わ申鐃緒申鐃粛は結構鐃緒申鐃暑か鐃夙思わ申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃銃ワ申鐃緒申多鐃舜わ申鐃宿御が必鐃竣でわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃術随申鐃緒申鐃銃わ申鐃所す鐃緒申鐃緒申鐃夙わ申鐃緒申鐃緒申鐃夙はわ申鐃緒申泙鐃緒申鵝�わ申辰箸皀鰹申鐃緒申箸鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申抒鐃緒申襪件申討六箸鐃緒申襯件申鐃緒申謄鐃祝はなわ申泙鐃緒申鵝２鐃緒申鐃緒申鐃緒申鐃緒申辰僂淵鐃緒申鐃緒申鐃緒申謄鐃緒申鐃緒申鐃緒申謄鐃祝居申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾逸申弔任鐃緒申鐃緒申僖鐃緒申奪肇侫鐃緒申襯随申鐃藷グでは￥申必鐃竣なワ申鐃緒申鐃俊ワ申鐃塾わ申鐃緒申離僖鐃緒申奪箸鐃緒申未鐃緒申鐃緒申鐃緒申鐃淑鰹申鐃塾パワ申鐃獣トわ申鐃緒申任鐃緒申襪鰹申箸鐃渋醐申鐃緒申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申飮鐃緒申鐃緒申鐃緒申泙泙妊鐃緒申鐃緒申鐃緒申謄鐃緒申鐃緒申鐃緒申鐃緒申任鐃緒申鐃緒け鐃叔わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃淑わ申鐃緒申呂鐃緒申鐃殉わ申鐃藷。わ申鐃緒申鐃緒申Linux kernel 2.4鐃緒申導鐃緒申鐃緒申鐃曙たnetfilter鐃緒申箸辰董鐃緒申僖鐃緒申奪肇侫鐃緒申襯随申鐃藷グにわ申鐃緒申匹鐃縦わ申鐃緒申鐃緒申法鐃塾器申鐃旬わ申鐃緒申鐃緒申鐃緒申鐃殉わ申鐃緒申
鐃銃デワ申鐃緒申鐃夙ワ申咼紂種申鐃緒申鐃緒申離僖奪鐃緒申鐃緒申鐃緒申妊鐃緒申鵐好函鐃緒申鐃叔わ申鐃緒申鐃緒申麓鐃緒申鐃祝わ申鐃緒申鐃緒申任鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申任魯鐃緒申鐃緒申鐃緒申鐃緒申薀わ申鵐好函鐃緒申襪刻申鐃緒申鐃祝￥申砲弔鐃緒申撞鐃緒申劼鐃緒申討鐃緒申泙鐃緒申鐃緒申泙鐃緒申鐃�netfilter鐃塾ペ￥申鐃緒申鐃祝わ申鐃獣わ申tar ball鐃薯おとわ申鐃銃わ申鐃殉わ申鐃緒申鐃緒申鐃塾後、
%tar xvzf /some/where/iptables-1.2.2.tar.gz%cd iptables-1.2.2%./configure && make%su#make install
鐃叔ワ申鐃藷スト￥申鐃暑し鐃殉わ申鐃緒申
鐃緒申鐃緒申kernel鐃緒申胴鐃緒申曚鐃緒申泙鐃緒申鐃宿�鐃竣でわ申鐃緒申弌鐃�iptables鐃緒申鐃緒申鐃循に含まわ申討鐃緒申鐃�(鐃緒申鐃塾わ申鐃緒申kernel鐃祝含まわ申討鐃緒申覆鐃�)patch鐃薯あてまわ申鐃緒申
#cd patch-o-matic#./runme
鐃緒申属鐃塾ドワ申鐃緒申鐃緒申函鐃緒申泪縫絅�鐃緒申鐃緒申椶鐃緒申未鐃緒申討鐃緒申鐃緒申鐃緒申鐃緒申鐃�HOWTO鐃緒申FAQ鐃淑ども参鐃粛になわ申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃叔緒申分鐃緒か鐃獣てわ申鐃殉わ申鐃出￥申鐃緒申鐃緒申文鐃熟の以降はまっわ申鐃緒申鐃宿わ申必鐃竣はわ申鐃緒申泙鐃緒申鵝０焚鐃緒申任魯鐃緒申泪鐃宿のワ申鐃竣ワ申鐃緒申鐃緒申鐃緒申呂錣�鐃緒申/調鐃駿わ申鐃暑こ鐃夙わ申鐃緒申鐃緒申箸鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申澆覆鐃緒申蕁∧件申狼鐃緒申鐃縦わ申鐃緒申任鐃初う鐃塾わ申鐃緒申鐃緒申鐃叔わ申鐃緒申
鐃夙りあ鐃緒申鐃緒申IP masquerade鐃緒申箸鐃緒申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申鐃緒申砲麓鐃緒申里茲�鐃祝わ申鐃殉わ申鐃緒申
#iptables -t nat -A POSTROUTING -o $PPPINTERFACE -j MASQUERADE#echo 1 > /proc/sys/net/ipv4/ip_forward
$PPPINTERFACE鐃緒申ppp鐃緒申interface(ppp0鐃淑わ申)鐃叔わ申鐃緒申2鐃緒申鐃旬わ申ip_forward鐃緒申鐃緒申鐃緒申鐃祝削申鐃緒申譴�鐃緒申鐃淑のわ申鐃緒申鐃春わ申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃緒申
鐃緒申鐃緒申鐃緒申鐃銃ワ申鐃緒申佑鐃緒申鐃緒申鐃祝はポリシ鐃緒申鐃夙わ申鐃緒申鐃緒申里鐃緒申鐃緒申必鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃緒申匹里茲�鐃緒申鐃縮随申鐃緒申鐃緒申鐃緒申鐃緒申鐃熟っわ申鐃緒申鐃緒申覆鐃緒申箸鐃緒申鐃緒申泙鐃緒申鵝�わ申鐃塾わ申鐃緒申砲呂鐃緒申離泪鐃緒申鵑�どのよう鐃緒申鐃緒申的鐃祝使わ申鐃暑か鐃緒申呂辰鐃緒申蠅居申鐃緒申覆鐃緒申討呂鐃緒申鐃緒申泙鐃緒申鵝�まわ申鐃緒申鐃緒申鐃緒申的鐃淑ワ申鐃初イ鐃緒申鐃緒申箸任鐃緒申鐃夙わ申鐃殉わ申鐃緒申
鐃緒申鐃祝ネットワー鐃緒申鐃緒申由鐃叔わ申鐃暑こ鐃夙をずらず鐃緒申鐃渋べてみまわ申鐃緒申web, mail, ftp, ssh鐃緒申鐃純え鐃出わ申鐃緒申4鐃縦わ申鐃叔緒申砲鐃緒申鐃夙わ申鐃殉わ申鐃緒申ssh鐃緒申daemon鐃盾起動鐃緒申鐃緒申討鐃緒申蝓�鐃緒申鐃緒申鐃緒申鐃�login鐃緒申鐃緒申鐃緒申鐃緒申箸砲鐃緒申泙鐃緒申鐃緒申个討鐃緒申鐃緒申鐃緒申離僖鐃緒申奪箸呂覆砲發件申覆鐃緒申鐃緒申箸砲鐃緒申董鐃緒申鐃緒申鐃緒申鐃緒申鐃獣てわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃渋をするこ鐃夙わ申佑鐃緒申泙鐃緒申鐃�
鐃術ワ申鐃獣トフワ申鐃暑タ鐃緒申鵐阿任蓮鐃緒申襦種申襪�鐃緒申鐃所さ鐃緒申討鐃緒申蝓�鐃緒申鐃獣てわ申鐃緒申僖鐃緒申奪箸鮓〆鐃緒申鐃緒申董鐃緒申鐃緒申蠅件申鐃緒申襦種申鐃祝緒申鐃獣て￥申鐃縮わ申鐃緒申鐃所、鐃縮わ申鐃淑わ申鐃獣わ申鐃所し鐃殉わ申鐃緒申鐃緒申鐃塾ルー鐃緒申鬚海譴�鐃緒申鐃緒申鐃所し鐃銃わ申鐃緒申鐃殉わ申鐃緒申鐃宿のルー鐃緒申砲鐃殉ッワ申鐃緒申鐃淑わ申鐃術ワ申鐃獣トはデフワ申鐃緒申箸離櫂螢件申鐃緒申砲鐃獣て緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申任泙鐃緒申鐃緒申離妊侫鐃緒申鐃夙のポリシ鐃緒申鐃緒申鐃緒申鐃所し鐃殉わ申鐃緒申
#iptables -P INPUT DROP#iptables -P OUTPUT ACCEPT#iptables -P FORWARD ACCEPT
鐃叔フワ申鐃緒申箸任魯僖鐃緒申奪箸呂覆砲劼箸勅鐃緒申鐃緒申箸鐃殉わ申鐃藷。わ申鐃緒申鐃緒申鐃銃わ申鐃緒申鐃銃￥申鐃縮わ申鐃術ワ申鐃獣トわ申鐃緒申鐃緒申的鐃祝誌申鐃所し鐃銃わ申鐃緒申鐃殉わ申鐃緒申鐃縮わ申鐃術ワ申鐃獣トわ申脳鐃緒申造砲鐃緒申襪鰹申箸鐃緒申鐃緒申鐃叔わ申鐃緒申
鐃緒申鐃緒申鐃緒申鐃獣てわ申鐃緒申里鐃緒申鐃縦わ申鐃緒申僖鐃緒申奪箸鐃緒申鐃所す鐃緒申襦種申鐃緒申鐃緒申鐃所し鐃殉わ申鐃緒申鐃殉わ申鐃緒申lo interface鐃緒申鐃縮わ申僖鐃緒申奪箸鐃緒申未鐃緒申泙鐃緒申鐃�
#iptables -A INPUT -i lo -j ACCEPT
鐃緒申鐃祝￥申鐃緒申鐃緒申connection鐃緒申張鐃緒申鐃銃わ申鐃緒申鐃縮随申鐃緒申鐃緒申弔鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申connection鐃緒申呂襪随申鐃緒申bind鐃緒申鐃緒申鐃楯￥申鐃夙わ申鐃緒か鐃緒申覆鐃緒申討鐃術ワ申鐃獣トわ申流鐃緒申鐃緒申鐃緒申弔任鐃緒申泙鐃緒申鐃�web,mail,ssh(client)鐃祝つわ申鐃銃はわ申鐃緒申能鐃淑�鐃叔わ申鐃緒申
#iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
鐃緒申鐃緒申state鐃祝わ申鐃術ワ申鐃獣トフワ申鐃暑タ鐃緒申鵐阿呂箸討盒�鐃熟で￥申2.4鐃緒申netfilter鐃塾誌申物鐃叔わ申鐃緒申conntrack鐃夙わ申鐃緒申鐃緒申鐃緒申鐃祝わ申蝓�established(鐃緒申続鐃緒申鐃緒申立鐃緒申鐃銃わ申鐃緒申)鐃淑パワ申鐃獣トはわ申箸鐃所、related(鐃緒申続鐃緒申鐃緒申弔鐃緒申鐃緒申僖鐃緒申奪箸離廛鐃緒申肇鐃緒申鐃祝器申連鐃塾わ申鐃緒申ftp-data鐃塾よう鐃淑パワ申鐃獣ワ申)鐃緒申鐃緒申続鐃緒申鐃緒申弔任鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申icmp鐃緒申鐃緒申弔鐃緒申泙鐃緒申鐃緒申鐃緒申鐃熟ポリシ鐃緒申鐃祝わ申鐃塾わ申鐃峻居申鐃縦にわ申鐃緒申戮鐃緒申幣鐃緒申發�鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申里任鐃緒申鐃緒申錣�鐃緒申笋刻申鐃緒申鐃緒申鐃緒申函鐃�ping鐃緒申鐃縮わ申鐃緒申鐃縮わ申鐃淑わ申鐃緒申鐃叔わ申鐃緒申鐃緒申ECHO鐃淑どわ申鐃庶し鐃銃わ申FRAG_NEEDED鐃緒申鐃縮わ申鐃処う鐃祝わ申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃祝￥申
#iptables -A INPUT -p icmp -d $MYSELF -j ACCEPT
$MYSELF鐃熟種申分鐃緒申IP address鐃叔わ申鐃緒申鐃緒申鐃緒申的鐃緒申IP鐃緒申鐃緒申蠅刻申鐃緒申broadcast鐃祝は縁申鐃緒申鐃淑わ申鐃淑わ申泙鐃緒申鐃緒申鐃緒申里鐃緒申鐃緒申鐃緒申櫂螢件申鐃緒申砲鐃緒申泙鐃緒申鐃�
鐃緒申鐃銃￥申鐃縦ってわ申里鐃�ftp鐃緒申ssh(daemon)鐃叔わ申鐃緒申鐃緒申鐃緒申鐃緒申呂匹鐃緒申鐃緒申connection鐃薯こわ申鐃初か鐃緒申呂鐃塾ではなわ申鐃緒申鐃緒申鐃緒申鐃縦わ申鐃緒申必鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃�sshd鐃緒申鐃緒申鐃緒申単鐃祝わ申鐃殉まわ申鐃縮わ申ACCEPT鐃緒申鐃緒申鐃緒申鐃緒申任鐃緒申鐃�ftp鐃緒申鐃緒申鐃熟￥申passive鐃叔なわ申ftp-data connection鐃緒申鐃緒申鐃緒申弔鐃緒申鐃塾でわ申鐃緒申鐃緒申鐃緒申鐃緒申肋鐃述わ申related鐃祝わ申辰鐃緒申未鐃緒申鐃緒申箸鐃緒申任鐃緒申泙鐃�(鐃緒申ip_conntrack_ftp, ip_nat_ftp)鐃緒申鐃叔わ申鐃緒申鐃初、
#iptables -A INPUT -p tcp -d $MYSELF --dport ssh -j ACCEPT
鐃叔わ申鐃緒申鐃緒申鐃夙になわ申泙鐃緒申鐃�
鐃緒申離僖鐃緒申奪函鐃緒申磴�鐃出￥申telnet鐃叔つなわ申鐃叔わ申鐃処う鐃夙わ申鐃緒申鐃術ワ申鐃獣トなどは捨てわ申鐃殉わ申鐃緒申DROP鐃熟捨ててもエ鐃初ー鐃薯示わ申鐃術ワ申鐃獣トわ申鐃瞬わ申鐃殉わ申鐃緒申鐃瞬わ申鐃処う鐃祝わ申鐃緒申鐃緒申鐃�REJECT鐃緒申箸鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申亮里討鐃緒申鐃術ワ申鐃獣トわ申鐃緒申鐃緒申砲箸辰討鐃緒申鐃緒申箸茲わ申任鐃緒申腓�鐃緒申鐃緒申鐃緒申鐃祝とわ申砲麓鐃緒申里茲�鐃祝わ申鐃殉わ申鐃緒申
#iptables -A INPUT -j LOG --log-prefix "Bad packet: "
鐃緒申鐃塾ネットワー鐃緒申鐃緒申鐃緒申離僖鐃緒申奪箸肇鐃緒申鐃緒申鐃緒申鐃粛ットワー鐃緒申鐃緒申鐃緒申離僖鐃緒申奪箸箸任楼鐃緒申鐃緒申鐃緒申僂鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申鐃緒申箸呂茲�鐃緒申鐃暑こ鐃夙でわ申鐃順う鐃緒申鐃緒申鐃緒申砲鐃�chain鐃緒申鐃術わ申鐃殉わ申鐃緒申chain鐃熟ワ申鐃瞬ルー鐃緒申鐃緒申澆鐃緒申鐃緒申覆鐃塾で￥申鐃殉ッワ申鐃緒申鐃緒申鐃術ワ申鐃獣トわ申target鐃祝書かれ、鐃緒申鐃緒申chain鐃塾逸申連鐃塾ルー鐃暑が適鐃術わ申鐃緒申泙鐃緒申鐃�chain鐃塾緒申端鐃殉でわ申鐃緒申函鐃緒申鐃夙わ申chain鐃塾種申鐃塾ルー鐃暑か鐃緒申泪奪鐃緒申鐃銃鰹申鐃緒申鐃殉わ申鐃緒申鐃渋わ申INPUT,OUTPUT,FORWARD鐃緒申chain鐃緒申鐃緒申鐃縮わ申built-in chain鐃淑どと呼ばわ申泙鐃緒申鐃�
鐃殉わ申chain鐃緒申鐃緒申泙鐃緒申鐃�
#iptables -N localnet
鐃緒申鐃緒申鐃緒申鐃緒申優奪肇錙種申鐃緒申鐃緒申鐃塾パワ申鐃獣トを、わ申鐃緒申chain鐃祝移らせ鐃緒申砲麓鐃緒申里茲�鐃祝わ申鐃殉わ申鐃緒申
#iptables -A INPUT -s $MYNET -d $MYSELF -j localnet
鐃緒申鐃緒申鐃緒申鐃緒申優奪肇錙種申鐃緒申鐃緒申鐃�sunrpc鐃舜のパワ申鐃獣トわ申鐃緒申弔鐃緒申鐃祝は種申鐃塾よう鐃祝わ申鐃殉わ申鐃緒申
#iptables -A localnet --dport sunrpc -j ACCEPT
鐃緒申鐃緒申鐃緒申鐃緒申優奪肇錙種申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申僖鐃緒申奪鐃緒申鐃緒申鐃緒申鐃緒申未鐃緒申任鐃緒申鐃緒申鐃縦とわ申鐃緒申鐃緒申鐃緒申鬚垢鐃塾は楽でわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申任鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申離泪鐃緒申鵑�器申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒害鐃緒申鐃緒申鐃順し鐃銃わ申鐃殉わ申鐃緒申鐃緒申任鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃粛ットワー鐃緒申鐃緒申鐃緒申離僖鐃緒申奪箸箸鐃緒申鐃緒申匹鐃緒申未鐃緒申僖鐃緒申奪箸郎鐃緒申鐃渋わ申鐃殉わ申鐃緒申鐃緒申鐃緒申鬚靴討鐃緒申鐃緒申鐃緒申鐃緒申鐃�
鐃緒申鐃緒申鐃叔は￥申鐃緒申鐃緒申他鐃塾わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃藷げてわ申鐃緒申鐃殉わ申鐃緒申鐃殉わ申鐃緒申web server鐃叔わ申鐃緒申鐃緒申呂匹鐃緒申鐃緒申鐃出わ申鐃緒申鐃叔わ申鐃順う鐃緒申鐃緒申単鐃叔わ申鐃緒申www port鐃緒申鐃緒申鐃緒申弔鐃緒申鐃処う鐃祝わ申鐃殉わ申鐃緒申
#iptables -A INPUT -p tcp -d $MYSELF --dport www -j ACCEPT
鐃緒申鐃暑さ鐃緒申netbios鐃塾パワ申鐃獣トわ申鐃縮わ申鐃銃なわ申鐃塾はわ申鐃緒申鐃塾でわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申多鐃緒申鐃銃削申鐃緒申弔鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃重�鐃緒申DROP鐃緒申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申丱鐃緒申鐃緒申砲箸鐃緒申泙鐃緒申鐃�
#iptables -A INPUT -d $MYSELF --dport netbios-ns -j DROP#iptables -A INPUT -d $MYSELF --dport netbios-dgm -j DROP#iptables -A INPUT -d $MYSELF --dport netbios-ssn -j DROP
IRC鐃緒申DCC鐃叔￥申鐃竣ライ鐃駿￥申鐃夙ワ申鐃宿レス鐃緒申鐃緒申鐃緒申鐃渋鰹申弋鐃熟わ申鐃塾ままでわ申鐃縮わ申泙鐃緒申鵝�わ申鐃緒申鐃夙わ申鐃緒申鐃緒申鐃夙わ申鐃緒申鐃緒申鐃熟￥申ftp鐃塾よう鐃緒申鐃緒申鐃術わ申module鐃緒申箸鐃宿�鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃�module鐃緒申2.4.7鐃緒申鐃淳￥申kernel鐃祝とりこ鐃殉わ申討泙鐃緒申鐃�iptables鐃緒申patch-o-matic鐃緒申箸鐃宿�鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃�IRC鐃緒申連鐃緒申patch鐃薯あてて￥申kernel鐃緒申鐃緒申鐃所し鐃銃再刻申鐃循わ申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�IRC鐃緒申server鐃緒申port鐃緒申鐃緒申蠅件申鐃�module鐃緒申鐃夙み刻申鐃淳まわ申鐃緒申port鐃熟ワ申鐃緒申泙廼鐃緒申擇辰鐃淑ｏ申鐃緒申鐃緒申鐃叔わ申鐃殉わ申鐃緒申
#modprobe -k ip_nat_irc ports=6667#modprobe -k ip_conntrack_irc ports=6667
鐃竣ライ鐃駿￥申鐃宿ワ申鐃宿レス鐃緒申鐃緒申辰鐃�client鐃緒申鐃術ワ申鐃獣トフワ申鐃暑タ鐃緒申鵐阿鬚靴討鐃緒申鐃祝わ申ip_conntrack_irc鐃緒申鐃緒申鐃緒申鐃緒申鐃宿わ申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�related鐃緒申鐃縮わ申茲�鐃祝なわ申泙鐃緒申鐃�
kernel鐃祝わ申他鐃祝もセ鐃緒申鐃緒申鐃銃ワ申鐃祝関わ申鐃緒申鐃緒申鐃所が鐃緒申鐃緒申鐃縦わ申鐃叔わ申鐃殉わ申鐃緒申鐃純え鐃出￥申IP spoofing鐃緒申鐃宿わ申rp_filter鐃緒申syn cookie鐃淑どわ申鐃緒申鐃緒申泙鐃緒申鐃�syn cookie鐃緒申kernel鐃緒申鐃緒申鐃所し鐃銃わ申default鐃叔わ申有鐃緒申鐃祝なわ申泙鐃緒申鵝０焚鐃緒申里茲�鐃祝わ申鐃殉わ申鐃緒申
if [ -f /proc/sys/net/ipv4/tcp_syncookies ]; then echo 1 > /proc/sys/net/ipv4/tcp_syncookies fi