Раздать инет с одной сетевой картой

На компе который будет раздавать инет:

# ifconfig eth0:1 10.0.1.11/16

# echo 1 > /proc/sys/net/ipv4/ip_forward

На компе который будет принимать инет:

# route add default gw 10.10.1.11

10.10.1.11 - IP адрес сервера который раздает (на eth0)
10.0.1.11 - IP адрес алиаса (eth0:1)

D-LINK DGE-528T

 # lspci -s 02:04.0 -vv
02:04.0 Ethernet controller: D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10)
    Subsystem: D-Link System Inc DGE-528T Gigabit Ethernet Adapter
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR-
    Latency: 32 (8000ns min, 16000ns max), Cache Line Size: 128 bytes
    Interrupt: pin A routed to IRQ 16
    Region 0: I/O ports at a000 [size=256]
    Region 1: Memory at fb000000 (32-bit, non-prefetchable) [size=256]
    [virtual] Expansion ROM at 30000000 [disabled] [size=128K]
    Capabilities: [dc] Power Management version 2
        Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
        Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
    Kernel driver in use: r8169
 
Device Drivers --->
[*] Network device support --->
[*] Ethernet (1000 Mbit) --->
<*> Realtek 8169 gigabit ethernet support