bin/81775: pppd(8) and tcpdump(8) no longer accept 'outbound' keyword.

[trasz]

>Number:         81775
>Category:       bin
>Synopsis:       pppd(8) and tcpdump(8) no longer accept 'outbound' keyword.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 01 19:40:01 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     trasz
>Release:        5.4
>Organization:
>Environment:
FreeBSD traszkan.ds7 5.4-RELEASE FreeBSD 5.4-RELEASE #2: Wed May 11 19:24:26 CEST 2005     trasz at traszkan.ds7:/usr/obj/usr/src/sys/TRASHCAN  i386

>Description:
      in freebsd-4.11 i used to use pppd in on-demand mode, with active-filter containing 'outbound' keyword, so that connection could be held up only by packets sent from my host, not from the outside.  that's to prevent some malicious attempts to held it up.  after migration to freebsd-5.4, the 'outbound' keyword is no longer accepted by pppd(8), nor tcpdump(8) - it fails with 'inbound/outbound not supported on linktype 9'.

>How-To-Repeat:
      tcpdump -i ppp0 outbound
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: