Master Network Troubleshooting with nali, dig, mtr, and tsunami

nali

nali ("where" in Chinese) is a tool that identifies IP addresses and adds geographic location information using the pure QQWry.dat database. After installation it provides several commands:

nali

nali-dig

nali-nslookup

nali-traceroute

nali-tracepath

nali-ping

The database is updated with

nali-update

, and all queries are performed locally, offering fast results.

Example outputs are shown in the accompanying screenshots.

dig

dig (Domain Information Groper) queries DNS records. It is included in the

bind-utils

package, so installing that package provides dig.

By default dig returns a single record; adding options returns all records. Common options include:

-c set class (IN, CH, HS)

-f read queries from a file

-4 or -6 force IPv4 or IPv6

-t specify query type (A, MX, etc.)

-q specify the domain name

-x reverse lookup (IP to domain)

+trace trace the query from the root

+nocmd suppress version info

+short output concise answer

Sample command outputs are illustrated with screenshots.

mtr

mtr combines traceroute and ping, using ICMP packets (and optionally TCP mode to bypass firewalls) to provide real‑time network path diagnostics.

Typical options:

-r generate a report

-w use wide hostnames

-c set packet count (default 10)

-i set interval between packets (default 1 s)

The tool displays loss percentage, sent packets, and latency statistics (Last, Avg, Best, Worst, StDev) for each hop, helping identify packet loss or routing issues.

Example screenshots demonstrate the interface and output.

tsunami

tsunami is a UDP‑based high‑speed transfer tool that uses TCP for control and UDP for data, reducing overhead and achieving fast transfers.

After downloading, compile with the provided

recompile.sh

script (requires autoconf and automake). The program has client and server modes; the server runs

tsunamid

with a filename or "*" to serve all files, while the client runs

tsunami

to connect and interact.

Typical client commands include

connect

,

dir

, and

get

. Screenshots show the interactive session and transfer speeds exceeding 100 Mbps.

Download URLs:

nali source: http://www.dwhd.org/wp-content/uploads/2015/08/nali-0.2.tar.gz

mtr source: https://github.com/traviscross/mtr.git

tsunami source: https://github.com/cheetahmobile/tsunami-udp.git