Ben,
i have two mxes, both relaying mail, via lmtp, to amavis, running on a third server. i'm wondering how i can configure $os_fingerprint_method to use the p0f data from both mail servers.
If you supply an asterisk '*' in place of an IP address in the setting of $os_fingerprint_method, it will be replaced by an IP address from which a connection to amavisd was received, i.e. your MX MTA. So the p0f query from amavisd will connect to a p0f service on your MTA which supplied the message currently being processed. Another option for more complex setups is through the use of policy banks. The os_fingerprint_method is a dynamic config parameter, as such it is a member of policy banks. You can configure amavisd to listen on multiple TCP ports, associate a policy bank with a dedicated os_fingerprint_method setting with each policy bank, then let each of your MX connect to its dedicated amavisd port. Mark
