Простите, что не написал все конфиги-был не рядом с серваком, а ответ хотелось получить до того, как рядом окажусь.
Вобщем, исходная ситуация такая. Есть две машины. На одной стоит 14.04.01. Вот с такими вот сетевухами:
lo Link encap:Локальная петля (Loopback)
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:49265 errors:0 dropped:0 overruns:0 frame:0
TX packets:49265 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2980867 (2.9 MB) TX bytes:2980867 (2.9 MB)
p4p1 Link encap:Ethernet HWaddr c4:a8:1d:7e:30:3c
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::c6a8:1dff:fe7e:303c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:32936471 errors:0 dropped:0 overruns:0 frame:0
TX packets:26385945 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:40841434763 (40.8 GB) TX bytes:4187301495 (4.1 GB)
p5p1 Link encap:Ethernet HWaddr c4:a8:1d:7e:2f:2d
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::c6a8:1dff:fe7e:2f2d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:27573501 errors:0 dropped:1451 overruns:0 frame:0
TX packets:33349299 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4502541793 (4.5 GB) TX bytes:40853221264 (40.8 GB)
И вот с таким файлом /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto p4p1
iface p4p1 inet dhcp
#auto p4p1
#iface p4p1 inet static
# address 10.54.99.34
# netmask 255.255.255.224
# gateway 10.54.99.34
# # dns-* options are implemented by the resolvconf package, if installed
# dns-nameservers 217.70.106.5 217.70.96.34
auto p5p1
iface p5p1 inet static
address 192.168.0.1
netmask 255.255.255.0
post-up /etc/nat
post-up /etc/sheiper.sh
Всё на ней работает, интернет раздается исправно, на самой машине Интернет есть
А есть вторая машина, на которой стоит 16.04.01 стакими вот сетевухами:
enp2s0 Link encap:Ethernet HWaddr 94:de:80:fa:18:e1
inet addr:10.54.99.34 Bcast:10.54.99.63 Mask:255.255.255.224
inet6 addr: fe80::96de:80ff:fefa:18e1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:855057 errors:0 dropped:7129 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:76434956 (76.4 MB) TX bytes:648 (648.0 B)
enp3s0 Link encap:Ethernet HWaddr c4:a8:1d:7e:30:36
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::c6a8:1dff:fe7e:3036/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:560 errors:0 dropped:0 overruns:0 frame:0
TX packets:121 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:90355 (90.3 KB) TX bytes:17088 (17.0 KB)
enp4s0 Link encap:Ethernet HWaddr c4:a8:1d:7e:2f:99
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Локальная петля (Loopback)
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:1 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:49 (49.0 B) TX bytes:49 (49.0 B)
И таким вот файлом /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto enp2s0
iface enp2s0 inet static
address 10.54.99.34
netmask 255.255.255.224
gateway 10.54.99.34
network 10.54.99.0
#dns-nameservers 217.70.106.5 217.70.96.34
auto enp3s0
iface enp3s0 inet static
address 192.168.0.1
netmask 255.255.255.0
auto enp4s0
iface enp4s0 inet static
address 192.168.2.1
netmask 255.255.255.0
И на этой машине интернета нет