src address issue

[Дмитрий Замураев (Dmitriy Zamuraev)]

you  use  default  route  from  R.E.A.L  IP, configure static route to
network/host 10.11.19.1 via you 10.11.8.X gate.

> Why with configured ip addresses
> fastvpn# ifconfig sis0
> sis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=82008<VLAN_MTU,WOL_MAGIC,LINKSTATE>
>         ether 00:0b:6a:a6:0c:f0
>         inet 10.11.8.18 netmask 0xffffff00 broadcast 10.11.8.255
>         inet6 fe80::20b:6aff:fea6:cf0%sis0 prefixlen 64 scopeid 0x1
>         inet R.E.A.L netmask 0xfffffffc broadcast XX.XX.XX.XX
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect (100baseTX <full-duplex>)
>         status: active

> on other machine I got:
> kes# tcpdump -n -i rl0 port 1812
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on rl0, link-type EN10MB (Ethernet), capture size 96 bytes
> 22:12:02.309034 IP R.E.A.L.19280 > 10.11.19.1.1812: RADIUS, Access Request (1), id: 0x38 length: 271
> ^C

> How to stick mpd5 on fastvpn to send ip from 10.11.8.18 and not from R.E.A.L?

> PS. This seem not mpd problem, this is kernel issue, I think.