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CentOS poslužitelj s dualnim NIC-om instaliranim u LAN-u i povezan s dualnim intranet segmentom može ostvariti istodobni pristup dualnom IP-u putem prosljeđivanja usmjernika na ruter.

2019-11-11 17:09:37

oznaka: CentOS, dual network interfaces, ip command, Dual NIC, dual NIC usmjeravanje, dual javni IP

Scenarij: Poslužitelj je u LAN-u i pruža usluge putem mapiranja rutera usmjerivača.Služitelj je opremljen dualnim mrežnim karticama, koje pripadaju različitim intranet segmentima. Svaki mrežni segment ima javnu IP adresu preslikanu na poslužitelj.

Simptom: Javna IP adresa koja odgovara zadanom NIC-u u dva NIC-a poslužitelja može normalno pristupiti poslužitelju, a drugoj IP adresi ne može se pristupiti.

Rješenje: Za pristup poslužitelju morate konfigurirati dvije javne IP adrese. Pretpostavimo da su dva mrežna segmenta: 192.168.0 i 192.168.1, a IP adrese poslužitelja na dva mrežna segmenta su: 192.168.0.9 i 192.168.1.9, a nazivi mrežnih kartica su: enp2s0 i enp3s0. Konfiguracija usmjeravanja je sljedeća:
echo "101 Net1" >> /etc/iproute2/rt_tables
echo "102 Net2" >> /etc/iproute2/rt_tables

ip route add default via 192.168.0.1 dev enp2s0 table Net1
ip route add default via 192.168.1.1 dev enp3s0 table Net2

ip rule add from 192.168.0.9 table Net1
ip rule add from 192.168.1.9 table Net2

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