Packages with the wrong source

[Vladislav V. Prodan]

I have two channels on the Internet PPPoE - tun1 and tun2.
When you start ntpd, incoming packets begin to crumble with the first
ISP, although requests come from the 2-nd ISP

23:40:53.548840 IP (tos 0x40, ttl 58, id 0, offset 0, flags [DF], proto
UDP (17), length 76)
    192.168.30.1.ntp > <my IP>.ntp: [udp sum ok] NTPv3, length 48
        symmetric active, Leap indicator:  (0), Stratum 3, poll 4s,
precision -19
        Root Delay: 0.021423, Root dispersion: 0.086944, Reference-ID:
Te.NeT.UA
          Reference Timestamp:  3460219701.661973714 (2009/08/25 23:08:21)
          Originator Timestamp: 3460221653.546850204 (2009/08/25 23:40:53)
          Receive Timestamp:    3460221653.552442133 (2009/08/25 23:40:53)
          Transmit Timestamp:   3460221653.552893817 (2009/08/25 23:40:53)
            Originator - Receive Timestamp:  +0.005591936
            Originator - Transmit Timestamp: +0.006043639

And these packages bandwidth demands grow to 2MBps
Only helps to turn off ntpd.
The only problem with the ntp packets
The problem suddenly appears and as suddenly disappears.
There are ideas on how to fix this problem?


# uname -a
FreeBSD mary-teresa.xxxxxxxxxxx 8.0-BETA4 FreeBSD 8.0-BETA4 #0: Sun Sep
13 03:05:09 EEST 2009
vlad11 at mary-teresa.xxxxxxxxxxx:/usr/obj/usr/src/sys/mary-teresa.18  amd64


# ntptrace -n 192.168.30.1
192.168.30.1: stratum 3, offset -0.000105, root distance 0.012885
[2-nd ISP]
195.138.zzz.34: stratum 2, offset 0.000140, root distance 0.012610
62.149.0.30: stratum 1, offset 0.000000, root distance 0.000000, refid 'GPS'

# netstat -rn | grep 192.168.
10.0.0.0/8         192.168.61.250     UGS         0   375059    vr1
192.168.0.0/16     192.168.61.250     UGS         0 48072705    vr1
192.168.60.0/23    link#3             U           0      790    vr1
192.168.60.194     link#4             UHS         0     3491    lo0

# netstat -rn | grep UGS
default            89.209.95.254      UGS         0 232097628   tun1
10.0.0.0/8         192.168.61.250     UGS         0   375120    vr1
192.168.0.0/16     192.168.61.250     UGS         0 49891561    vr1


1-st ISP <--- tun1 <-- vr0 -- [router] -- vr1 --> tun2 --> 2-nd ISP

# ifconfig vr0
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=2808<VLAN_MTU,WOL_UCAST,WOL_MAGIC>
        ether 00:11:95:ff:a7:c0
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
# ifconfig vr1
vr1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0
mtu 1500
        options=2808<VLAN_MTU,WOL_UCAST,WOL_MAGIC>
        ether 00:02:44:8b:89:40
        inet 192.168.60.194 netmask 0xfffffe00 broadcast 192.168.61.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
# ifconfig tun1
tun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1492
        inet 89.209.sss.sss --> 89.209.95.254 netmask 0xffffffff
        Opened by PID 1582
# ifconfig tun2
tun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1492
        inet 85.238.sss.sss --> 195.138.80.134 netmask 0xffffffff
        Opened by PID 97047