*BSDThis forum is for the discussion of all BSD variants.
FreeBSD, OpenBSD, NetBSD, etc.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
My question is:
I have freebsd server with 2 network cards, i use it for nat and i would like to know how module DUMMYNET can be helpful in filtering imcp "smurf". Does omeone know how to limit icmp smurf but allow normal ping to my host?
Type sysctl -a | grep icmp to see all kernel variables related to ICMP. You have icmplim which limit the number of ICMP packets by second and log_redirect, drop_redirect ...
In the same way, look in the kernel configuration file (in /usr/src/sys/i386/conf), you'll find ICMP options.
In IPFW, you'll only find parameters to drop or not ICMP packets.
I think DUMMYNET is only for TCP not for ICMP.
Hope it helps
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.
IPFW Firewall pppd based
