A daemon, running in background on a Linux router or firewall, monitoring the state of multiple internet uplinks/providers and changing the routing accordingly. LAN/DMZ internet traffic is load balanced between the uplinks.
Uplink LAN: ping 208.67.222.222... bind: Cannot assign requested address
error
Uplink LAN: ping 4.2.2.3... bind: Cannot assign requested address
error
Uplink LAN: ping 8.8.8.8... bind: Cannot assign requested address
error
Uplink LAN: ping 8.8.4.4... bind: Cannot assign requested address
error
Uplink LAN: ping 208.67.220.220... bind: Cannot assign requested address
error
Uplink LAN: avoiding more tests because too many have been failed
Uplink LAN: 0 successful tests, 5 unsuccessful tests, state down
Uplink Internal Wi-Fi: ping 4.2.2.2... bind: Cannot assign requested address
error
Uplink Internal Wi-Fi: ping 208.67.220.220... bind: Cannot assign requested address
error
Uplink Internal Wi-Fi: ping 208.67.222.222... bind: Cannot assign requested address
error
Uplink Internal Wi-Fi: ping 4.2.2.3... bind: Cannot assign requested address
error
Uplink Internal Wi-Fi: ping 8.8.8.8... bind: Cannot assign requested address
error
Uplink Internal Wi-Fi: avoiding more tests because too many have been failed
Uplink Internal Wi-Fi: 0 successful tests, 5 unsuccessful tests, state down
Choosing default route: available uplinks:
Choosing default route: highest priority group uplinks:
Choosing default route: no available uplinks, no need for an update
No waiting, because all of the priority group members are down
...
And there's my config:
#see https://github.com/drsound/fault_tolerant_router for a complete parameter
#description
#add as many uplinks as needed, in this example ppp0 is used as default route only if both eth1 and eth2 are down
uplinks:
- interface: enp2s0
type: static
ip: 192.168.1.16
gateway: 192.168.1.1
description: LAN
priority_group: 1
- interface: wlp4s0
type: static
ip: 192.168.1.116
gateway: 192.168.1.1
description: Internal Wi-Fi
downlinks:
lan: eth0
#leave blank if you have no DMZ
dmz:
tests:
#an array of IP addresses to ping to verify the uplinks state. You can add as
#many as you wish. Predefined ones are Google DNS, OpenDNS DNS, other public
#DNS. Every time an uplink is tested the IP addresses are shuffled, so listing
#order is not important.
ips:
- 8.8.8.8
- 8.8.4.4
- 208.67.222.222
- 208.67.220.220
- 4.2.2.2
- 4.2.2.3
#number of successfully pinged IP addresses to consider an uplink to be
#functional
required_successful: 2
#number of ping retries before giving up on an IP
ping_retries: 1
#seconds between a check of the uplinks and the next one
interval: 60
log:
#file: "/var/log/fault_tolerant_router.log"
file: "/tmp/fault_tolerant_router.log"
#maximum log file size (in bytes). Once reached this size, the log file will
#be rotated.
max_size: 1024000
#number of old rotated files to keep
old_files: 10
email:
send: false
sender: router@domain.com
recipients:
- user1@domain.com
- user2@domain.com
- user3@domain.com
#see http://ruby-doc.org/stdlib-2.3.1/libdoc/net/smtp/rdoc/Net/SMTP.html
smtp_parameters:
address: smtp.gmail.com
port: 587
#domain: domain.com
authentication: :login
enable_starttls_auto: true
user_name: user@gmail.com
password: secret-password
#base IP route table number, just need to change if you are already using
#multiple routing tables
base_table: 1
#just need to change if you are already using ip policy routing, to avoid
#overlapping, must be higher than 32767 (the default routing table priority,
#see output of "ip rule" command)
base_priority: 40000
#just need to change if you are already using packet marking, to avoid
#overlapping
base_fwmark: 1
I've configured my adapters in the config while, and whenever I
monitor, I get something like this:And here's the output with
--debug:And there's my config: