lbd Usage Example

Test to see if the target domain ( is using a load balancer:

root@kali:~# lbd

lbd - load balancing detector 0.1 - Checks if a given domain uses load-balancing.
Written by Stefan Behte (
Proof-of-concept! Might give false positives.

Checking for DNS-Loadbalancing: NOT FOUND
Checking for HTTP-Loadbalancing [Server]:
ECS (sea/55ED)
ECS (sea/1C15)

Packages and Binaries:


Checks if a given domain uses load-balancing.

Installed size: 15 KB
How to install: sudo apt install lbd

root@kali:~# lbd -h
host: illegal option -- h
Usage: host [-aCdilrTvVw] [-c class] [-N ndots] [-t type] [-W time]
            [-R number] [-m flag] [-p port] hostname [server]
       -a is equivalent to -v -t ANY
       -A is like -a but omits RRSIG, NSEC, NSEC3
       -c specifies query class for non-IN data
       -C compares SOA records on authoritative nameservers
       -d is equivalent to -v
       -l lists all hosts in a domain, using AXFR
       -m set memory debugging flag (trace|record|usage)
       -N changes the number of dots allowed before root lookup is done
       -p specifies the port on the server to query
       -r disables recursive processing
       -R specifies number of retries for UDP packets
       -s a SERVFAIL response should stop query
       -t specifies the query type
       -T enables TCP/IP mode
       -U enables UDP mode
       -v enables verbose output
       -V print version number and exit
       -w specifies to wait forever for a reply
       -W specifies how long to wait for a reply
       -4 use IPv4 query transport only
       -6 use IPv6 query transport only

Updated on: 2021-Oct-14