Bird-lg-go

An alternative implementation for bird-lg written in Go. Both frontend and backend (proxy) are implemented, and can work with either the original Python implementation or the Go implementation.

The code on master branch no longer support BIRDv1. Branch "bird1" is the last version that supports BIRDv1.

Table of Contents

• Bird-lg-go
  • Table of Contents
  • Build Instructions
    • Build Docker Images
  • Frontend
  • Proxy
  • Advanced Features
    • Display names
    • IP addresses
    • API
    • Telegram Bot Webhook
  • Credits
  • License

Build Instructions

You need to have Go 1.16 or newer installed on your machine.

Run make to build binaries for both the frontend and the proxy.

Optionally run make install to install them to /usr/local/bin (bird-lg-go and bird-lgproxy-go).

Build Docker Images

Use the Dockerfiles in frontend and proxy directory.

Frontend

The frontend directory contains the code for the web frontend, where users see BGP states, do traceroutes and whois, etc. It's a replacement for "lg.py" in original bird-lg project.

Features implemented:

• Show peering status (show protocol command)
• Query route (show route for ..., show route where net ~ [ ... ])
• Whois and traceroute
• Work with both Python proxy (lgproxy.py) and Go proxy (proxy dir of this project)
• Visualize AS paths as picture (bgpmap feature)

Usage: all configuration is done via commandline parameters or environment variables, no config file.

Parameter	Environment Variable	Description
--servers	BIRDLG_SERVERS	server name prefixes, separated by comma
--domain	BIRDLG_DOMAIN	server name domain suffixes
--listen	BIRDLG_LISTEN	address bird-lg is listening on (default "5000")
--proxy-port	BIRDLG_PROXY_PORT	port bird-lgproxy is running on (default 8000)
--whois	BIRDLG_WHOIS	whois server for queries (default "whois.verisign-grs.com")
--dns-interface	BIRDLG_DNS_INTERFACE	dns zone to query ASN information (default "asn.cymru.com")
--bgpmap-info	BIRDLG_BGPMAP_INFO	the infos displayed in bgpmap, separated by comma, start with : means allow multiline (default "asn,as-name,ASName,descr")
--title-brand	BIRDLG_TITLE_BRAND	prefix of page titles in browser tabs (default "Bird-lg Go")
--navbar-brand	BIRDLG_NAVBAR_BRAND	brand to show in the navigation bar (default "Bird-lg Go")
--navbar-brand-url	BIRDLG_NAVBAR_BRAND_URL	the url of the brand to show in the navigation bar (default "/")
--navbar-all-servers	BIRDLG_NAVBAR_ALL_SERVERS	the text of "All servers" button in the navigation bar (default "ALL Servers")
--navbar-all-url	BIRDLG_NAVBAR_ALL_URL	the URL of "All servers" button (default "all")
--net-specific-mode	BIRDLG_NET_SPECIFIC_MODE	apply network-specific changes for some networks, use "dn42" for BIRD in dn42 network
--protocol-filter	BIRDLG_PROTOCOL_FILTER	protocol types to show in summary tables (comma separated list); defaults to all if not set

Example: the following command starts the frontend with 2 BIRD nodes, with domain name "gigsgigscloud.dn42.lantian.pub" and "hostdare.dn42.lantian.pub", and proxies are running on port 8000 on both nodes.

./frontend --servers=gigsgigscloud,hostdare --domain=dn42.lantian.pub --proxy-port=8000

Example: the following docker-compose.yml entry does the same as above, but by starting a Docker container:

services:
  bird-lg:
    image: xddxdd/bird-lg-go
    container_name: bird-lg
    restart: always
    environment:
      - BIRDLG_SERVERS=gigsgigscloud,hostdare
      - BIRDLG_DOMAIN=dn42.lantian.pub
    ports:
      - "5000:5000"

Demo: https://lg.lantian.pub

Proxy

The proxy directory contains the code for the "proxy" for bird commands and traceroutes. It's a replacement for "lgproxy.py" in original bird-lg project.

Features implemented:

• Sending queries to BIRD
• Sending "restrict" command to BIRD to prevent unauthorized changes
• Executing traceroute command on Linux, FreeBSD and OpenBSD
• Source IP restriction

Usage: all configuration is done via commandline parameters or environment variables, no config file.

Parameter	Environment Variable	Description
--allowed	ALLOWED_IPS	IPs allowed to access this proxy, separated by commas. Don't set to allow all IPs. (default "")
--bird	BIRD_SOCKET	socket file for bird, set either in parameter or environment variable BIRD_SOCKET (default "/var/run/bird/bird.ctl")
--listen	BIRDLG_PROXY_PORT	listen address, set either in parameter or environment variable BIRDLG_PROXY_PORT(default "8000")
--traceroute_bin	BIRDLG_TRACEROUTE_BIN	traceroute binary file, set either in parameter or environment variable BIRDLG_TRACEROUTE_BIN(default "traceroute")
--traceroute_raw	BIRDLG_TRACEROUTE_RAW	whether to display traceroute outputs raw (default false)

Example: start proxy with default configuration, should work "out of the box" on Debian 9 with BIRDv1:

./proxy

Example: start proxy with custom bird socket location:

./proxy --bird /run/bird.ctl

Example: the following docker-compose.yml entry does the same as above, but by starting a Docker container:

services:
  bird-lgproxy:
    image: xddxdd/bird-lgproxy-go
    container_name: bird-lgproxy
    restart: always
    volumes:
      - "/run/bird.ctl:/var/run/bird/bird.ctl"
    ports:
      - "192.168.0.1:8000:8000"

You can use source IP restriction to increase security. You should also bind the proxy to a specific interface and use an external firewall/iptables for added security.

Advanced Features

Display names

The server parameter is composed of server name prefixes, separated by comma. It also supports an extended syntax: It allows to define display names for the user interface that are different from the actual server names.

For instance, the two servers from the basic example can be displayed as "Gigs" and "Hostdare" using the following syntax (as known from email addresses):

./frontend --servers="Gigs<gigsgigscloud>,Hostdare<hostdare>" --domain=dn42.lantian.pub

IP addresses

You may also specify IP addresses as server names when no domain is specified. IPv6 link local addresses are supported, too.

For example:

./frontend --servers="Prod<prod.mydomain.local>,Test1<fd88:dead:beef::1>,Test2<fe80::c%wg0>" --domain=

These three servers are displayed as "Prod", "Test1" and "Test2" in the user interface.

API

The frontend provides an API for running BIRD/traceroute/whois queries.

See API docs for detailed information.

Telegram Bot Webhook

The frontend can act as a Telegram Bot webhook endpoint, to add BGP route/traceroute/whois lookup functionality to your tech group.

See Telegram docs for detailed information.

Credits

• Everyone who contributed to this project (see Contributors section on the right)
• Mehdi Abaakouk for creating the original bird-lg project
• Bootstrap as web UI framework

License

GPL 3.0