kern/75634: The proxy arp wrong functionality

[Alexander Haidukov]

>Number:         75634
>Category:       kern
>Synopsis:       The proxy arp wrong functionality
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Dec 29 20:30:30 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Alexander Haidukov
>Release:        5.2.1
>Organization:
SWsoft Inc.
>Environment:
FreeBSD router 5.2.1-RELEASE-p12 FreeBSD 5.2.1-RELEASE-p12 #2: Tue Dec 14 21:47:56 MSK 2004     sanek at router:/usr/src/sys/i386/compile/ROUTER  i386

>Description:
      I have /28 real IP. I tryed setup my router with "proxy arp" with arp -s command. Router have two interfaces: one with real IP and second with fake IP. And i have one IP from /28 range on one of my interlal host. This host have a Windows 2000 AS operating system. So, if i setup IP to internal host until make my router with "proxy arp" all is ok - the "proxy arp" work properly. If i setup first "proxy arp" on router and after setup IP on Windows machine i have a address conflict, i.e. my router arp reply to Windows machine (connected to internal iface) and Windows saying that her IP use another host with external iface MAC address of my router. 
>How-To-Repeat:
See documentations, try find how to setup FreeBSD with "proxy arp".
>Fix:
I don't known how fix problem.
>Release-Note:
>Audit-Trail:
>Unformatted: