Paul Murphy wrote: > > Does anyone know of a way to get Firewall-1 NG on IPSO (Nokia platform) > to respond to broadcast pings?
Since it's FreeBSD based, does it have a, net.inet.icmp.bmcastecho sysctl(8)? Set it to '1' to enable responses. > While at the same time not being vulnerable to smurf attacks. Responding to broadcast echo requests is a necessary, but not sufficient, condition to be a smurf amplifier. You must have directed broadcasts enabled in the router. AFAIK, FreeBSD, and thus IPSO, never does directed broadcasts. You should also make sure it is disabled in all other routers. > I would like to set this on a per interface level, but preferably at a > host level (ie only respond to broadcast pings from a particular source > address). It cannot be set in the IP implementation at the kernel level. There is however, nothing stopping you from putting in firewall rule to block the incoming echo requests with a specific broadcast destination. They will be blocked before they reach ICMP processing. -- Crist J. Clark [EMAIL PROTECTED] Globalstar Communications (408) 933-4387 The information contained in this e-mail message is confidential, intended only for the use of the individual or entity named above. If the reader of this e-mail is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any review, dissemination, distribution or copying of this communication is strictly prohibited. If you have received this e-mail in error, please contact [EMAIL PROTECTED] ================================================= To set vacation, Out Of Office, or away messages, send an email to [EMAIL PROTECTED] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [EMAIL PROTECTED] =================================================
