Mario, personnally, following a DoS REGISTER attack I had recently, I configured some rate-limiting on REGISTER attempts. Here is the result, in "iptables-save" format: -A INPUT -d YOUR_FS_IP -p udp -m udp --dport YOUR_FS_PORT -m string -- string "REGISTER" --algo kmp --from 20 --to 60 -j dos-filter-register- external -A dos-filter-register-external -m hashlimit --hashlimit 5/sec -- hashlimit-burst 8 --hashlimit-mode srcip --hashlimit-name REGISTER -- hashlimit-htable-size 24593 --hashlimit-htable-expire 90000 -j RETURN -A dos-filter-register-external -j REJECT --reject-with icmp-admin- prohibited This will ratelimit REGISTER packets coming to YOUR_FS_IP:YOUR_FS_PORT to 5 per second for each source IP. PS: thanks to the experienced people on #freeswitch for the help provided to setup this filter. David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34 Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. IPeva décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur. Le 05/10/2010 à 20:55, Mario a écrit :
After working 4 hours I found that FS was hosed due to someone from 208.109.87.234 sending tons of traffic to FS. I blocked the IP address. Not only did it overload the connection but stopped FS from working, meaning no phones. This had not happened with the SPA9000. I listed on on a FS conference call discussing this issue. Is there someplace that has a list of things to do to prevent/reduce this? I did have ports, etc. blocked in the firewall. Thanks. Mario
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