[pp@cyb-a-tech ppp]$ uname -a
Linux cyb-a-tech 4.3.3-slx-20151216-1 #1 SMP Wed Dec 16 23:06:01 EST 2015 x86_64 x86_64 x86_64 GNU/Linux

[pp@cyb-a-tech ppp]$ cat /etc/redhat-release
Fedora release 21 (Twenty One)

Интерфейсы
[pp@cyb-a-tech ppp]$ ifconfig 
eno1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 00:0b:ab:a5:03:40  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 20  memory 0xf7c00000-f7c20000  

enp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 00:0b:ab:a5:03:41  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device memory 0xf7900000-f79fffff  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 800  bytes 44004 (42.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 800  bytes 44004 (42.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
        inet 10.105.192.245  netmask 255.255.255.255  destination 10.64.64.64
        ppp  txqueuelen 3  (Point-to-Point Protocol)
        RX packets 14  bytes 4084 (3.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 85  bytes 7217 (7.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 46:85:05:43:7d:35  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.88.29  netmask 255.255.255.0  broadcast 192.168.88.255
        inet6 fe80::4a51:b7ff:fe41:d3ae  prefixlen 64  scopeid 0x20<link>
        ether 48:51:b7:41:d3:ae  txqueuelen 1000  (Ethernet)
        RX packets 93246  bytes 93232653 (88.9 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 44090  bytes 5468285 (5.2 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Нужно что бы работали одновременно ppp0 (соединение идёт через 3g модем PCI-Ex) и wlp4s0 (Wi-Fi) 

По отдельности всё работает при включение 3g (ifup ppp0)
соединение во внешку идёт через 3g 

[pp@cyb-a-tech ppp]$ ping -I wlp4s0 8.8.8.8
PING 8.8.8.8 (8.8.8.8) from 192.168.88.29 wlp4s0: 56(84) bytes of data.
^C
--- 8.8.8.8 ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 5999ms

После отключения ifdown ppp0 Wi-Fi нормально подымаеться.

Как я понимаю проблемма в dns где и как прописпть правила ????