kern/147191: Problems with ppp -nat [pppoe], ipfw, dummynet

[Jose M Rodriguez]

>Number:         147191
>Category:       kern
>Synopsis:       Problems with ppp -nat [pppoe], ipfw, dummynet
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat May 29 15:40:06 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Jose M Rodriguez
>Release:        FreeBSD 8.1-PRERELEASE amd64
>Organization:
Redes JM
>Environment:
System: FreeBSD mag.animas.redesjm.priv 8.1-PRERELEASE FreeBSD 8.1-PRERELEASE #0: Thu May 27 06:34:54 UTC 2010 root at mag.animas.redesjm.priv:/usr/obj/usr/src/sys/GENERIC amd64

>Description:
	Machine running as internet gateway (ipv4 only)
	just one inet interface nfe0
	used both for internal lan and pppoe connection to adsl bridge
	ppp used for pppoe, again over nfe0, with nat enable
	ipfw used with dummynet for firewalling and traffic sharper
	I can send requested config on demand

	- I have Internet conectivity
	- pppoe seems working, nat included, even opened ports
	- internal lan seems ok, both in and out
	- traffic received via tun0 seems working

	- In lan workstations have correct inet access
	- In lan p2p working ok (bitcomet)
	- transmission-bt working ok on server

	But, traffic sharp doesnt work as spected
	After all short of test, seems that:

	- traffic from local lan to tun0 pass out without hit on fw rules
	- after log enable, I can see ONLY local traffic xmit tun0

	tested with/without tx/rx checksuming aids an tso, no luck
	any clues are wellcome

>How-To-Repeat:

	All sort of test done in fw rules, without any hit detected,
	so I suspect traffic from lan is going directly to tun0
	without hitting dummynet.

>Fix:

	Well, this is not the case

>Release-Note:
>Audit-Trail:
>Unformatted: