GUIDE: set default gateway eth0 or eth1

FreePBX Networking
1

eth0 - lan2wan - ethernet
eth1 - ISP 10/8 NAT - SIP/trunk

rote add default via 100.64.0.1 eth0

service network restart

ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
64 bytes from 1.1.1.1: icmp_seq=554 ttl=57 time=6.10 ms
64 bytes from 1.1.1.1: icmp_seq=555 ttl=57 time=6.40 ms
64 bytes from 1.1.1.1: icmp_seq=556 ttl=57 time=5.22 ms
From 10.x.x.x. icmp_seq=557 Destination Host Unreachable
From …

This will help you save time and attempts to set up routing.

cd /etc/sysconfig/network-scripts

ll

[root@VoIP network-scripts]# ll
total 224
-rwxr-xr-x 1 root root 296 Feb 4 11:05 ifcfg-eth0
-rwxr-xr-x 1 root root 218 Feb 4 11:05 ifcfg-eth1
-rw-r–r-- 1 root root 281 Feb 2 21:08 ifcfg-lo
lrwxrwxrwx. 1 root root 24 Feb 1 21:05 ifdown → …

nano ifcfg-eth0

DEVICE=eth0
DEFROUTE=yes
BOOTPROTO=static
…

nano ifcfg-eth1

DEVICE=eth1
DEFROUTE=no
BOOTPROTO=dhcp
ONBOOT=‘yes’

service network restart

congrats you just saved your time

route

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default pfSense.lan.vit 0.0.0.0 UG 0 0 0 eth0
10.155.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
100.64.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
link-local 0.0.0.0 255.255.0.0 U 1002 0 0 eth0
link-local 0.0.0.0 255.255.0.0 U 1003 0 0 eth1

ping 1.1.1.1

PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=57 time=5.70 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=57 time=5.56 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=57 time=5.75 ms
64 bytes from 1.1.1.1: icmp_seq=4 ttl=57 time=5.70 ms
64 bytes from 1.1.1.1: icmp_seq=5 ttl=57 time=5.99 ms
64 bytes from 1.1.1.1: icmp_seq=6 ttl=57 time=5.72 ms
64 bytes from 1.1.1.1: icmp_seq=7 ttl=57 time=5.68 ms
64 bytes from 1.1.1.1: icmp_seq=8 ttl=57 time=5.84 ms
64 bytes from 1.1.1.1: icmp_seq=9 ttl=57 time=6.08 ms

traceroute 1.1.1.1

traceroute to 1.1.1.1 (1.1.1.1), 30 hops max, 60 byte packets
1 pfSense.lan.vitko-core.ru (100.64.0.1) 1.078 ms 0.905 ms 0.413 ms
2 …
7 cloudflare.mdix.net (193.17.78.13) 6.028 ms 5.946 ms 5.547 ms
8 one.one.one.one (1.1.1.1) 5.258 ms 5.208 ms 5.079 ms

1 Like
2

and don’t forget to DHCP add GATEWAY= - yeah static for dhcp method

ifcfg-eth1
FreePBX Sysadmin Generated network configuration.
#This file was generated at 2023-02-02T18:57:55+00:00
DEVICE=eth1
DEFROUTE=no
BOOTPROTO=dhcp
ONBOOT=‘yes’
PEERDNS=no
IPV6_PEERDNS=no
ZONE=external
DESCRIPTION=“IDC”

GATEWAY=10.155.0.1

traceroute 10.155.0.1

traceroute to 10.155.0.1 (10.155.0.1), 30 hops max, 60 byte packets
1 10.155.0.1 (10.155.0.1) 5.310 ms * *

eth0 for Freepbx update and acces to WAN
eth1 for ISP 10.0.0.0/8/NAT

P.S. i know 10.155.0.0/255.255.0.0 != 10.0.0.0/8 it is 10.155.0.0/14 just showing that this is the provider’s network

3

BOOTPROTO=dhcp

Is almost always a bad choice if you are in control of your network.

4

it is my bridge with ISP SIP DHCP

image
image795×1080 122 KB

5

Does it ever change? (Probably not)

6

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