FreeBSD deny 'unusual' IP-addresses?

From: Васенин Александр aka BlackSir (blacksir_at_number.ru)
Date: 01/17/04

  • Next message: Patrik Forsberg: "RE: FreeBSD deny 'unusual' IP-addresses?" 
    To: <freebsd-isp@freebsd.org>
Date: Sat, 17 Jan 2004 13:24:13 +0300

    I work in a small ISP company. We are using FreeBSD machines for routing and
    counting traffic of our clients. I faced with subject 'feature' twise:

    1) FreeBSD Server with a real ip in external interface and a lot of IPs like
    10.1.1.1/24, 172.16.13.1/24 (NOT ANY 192.168...!)on internal interface. If
    someone tries to up an ANY address like 192.168.0.1/24 - our server always
    talk that this address is already in use. Those clients need these
    addresses, becouse they use our LAN as transport beetween two offices. I
    solved this problem by upping 192.168.1.1/16 on internal server interface .

    2) One of our client use our LAN for testing their experimental hardware
    device (i don`t know what that thing do, but in connected to network). For
    some unknown reason that device use a real IP-address that not belongs to
    me, but they don't want to change the address(why? - I don't know). Our
    server swears that this address is already in use.

    I understand, that using such thing is not compliant to standarts, but maybe
    someone knows how to switch off those kind of alarms?
            Vasenin Alexander aka BlackSir

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