Simple mod_perl Question

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I just wanted to verify that there weren't any hidden gotchas by doing
the following:

    # set actual ip of host doing the requesting instead of the proxy
    my ($actual_remote_ip) = split /,/, $r->header_in('X-Forwarded-For');
    $r->connection->remote_ip($actual_remote_ip) if $actual_remote_ip;

I just wanted to make sure there would be any conditions that the above 
code wouldn't handle.

-- Jeff Bisbee / mod_perl-users@xxxxxxx.xxx / jbisbee.com