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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">I want to ask about FWaaS iptables rule implementation.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">firewall rule are deployed as iptables rules in network node , and ACCEPT target is set at second rule(*).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">----<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Chain neutron-l3-agent-iv431d7bfbc (1 references)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">pkts bytes target prot opt in out source destination<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 state INVALID<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED (*)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 neutron-l3-agent-liA31d7bfbc tcp -- * * 172.16.2.0/23 1.2.3.4 tcp spts:1025:65535 dpt:80</span><span style="font-size:10.0pt;font-family:"$B#M#S(B $B%4%7%C%/(B"">$B!!!!!!(B</span><span lang="EN-US" style="font-size:10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 neutron-l3-agent-liA31d7bfbc tcp -- * * 172.16.6.0/24 1.2.3.4 tcp spts:1025:65535 dpt:80</span><span style="font-size:10.0pt;font-family:"$B#M#S(B $B%4%7%C%/(B"">$B!!!!!!(B</span><span lang="EN-US" style="font-size:10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 neutron-l3-agent-liA31d7bfbc tcp -- * * 1.2.3.4 172.16.14.0/24 tcp spts:1025:65535 dpt:11051</span><span style="font-size:10.0pt;font-family:"$B#M#S(B $B%4%7%C%/(B"">$B!!(B</span><span lang="EN-US" style="font-size:10.0pt">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 neutron-l3-agent-liA31d7bfbc tcp -- * * 10.3.0.0/24 1.2.3.4 tcp spts:1025:65535 dpt:22</span><span style="font-size:10.0pt;font-family:"$B#M#S(B $B%4%7%C%/(B"">$B!!!!!!(B</span><span lang="EN-US" style="font-size:10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"> 0 0 neutron-l3-agent-liD31d7bfbc all -- * * 0.0.0.0/0 0.0.0.0/0</span><span style="font-size:10.0pt;font-family:"$B#M#S(B $B%4%7%C%/(B"">$B!!(B</span><span lang="EN-US" style="font-size:10.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">----<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">Why is ACCEPT rule set at second in iptables rule. Performance reason(ICMP or other protocol such as UDP/TCP)?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">This causes some wrong scenario for example...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">[outside openstack cloud] ---> Firewall(FWaaS) --> [inside openstack cloud]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">1) admin create Firewall and create Filrewall rule accepting ICMP request from outside openstack cloud, and
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">2) ICMP request packets incoming from outside to inside, and<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">3) someday, admin detects that ICMP rule is security vulnerability and create Firewall rule blocking ICMP request from outside.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt">but ICMP request packets still incoming due to ACCEPT rule(*), because ICMP connection still hit rule at second(*).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">Thanks.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">kazuhiro MIYASHITA<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt"><o:p> </o:p></span></p>
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