---
name: "mfsnetdump"
section: "8"
platform: "linux"
package: "moosefs"
version: "4.59.2-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/mfsnetdump"
---

# mfsnetdump(8)

dump network traffic as mfs packets

## NAME

mfsnetdump - dump network traffic as mfs packets

## SYNOPSIS

**mfsnetdump** \[**-r** *PCAP\_FILE*\] \[**-i** *INTERFACE*\] \[**-p** *PORT\_RANGE*\] \[**-f** *PCAP\_FILTER*\] \[**-c** *PCOUNT*\] \[**-s** *MBYTES*\] \[**-e** *COMMANDS*\] \[**-o** *COMMANDS*\] \[**-x**\] \[**-y**\] \[**-n**\]

## DESCRIPTION

**mfsnetdump** is an internal diagnostic tool similar to tcpdump, but specialized for MooseFS.

## OPTIONS

- **-r**

  specify PCAP file to read packets from

- **-i**

  dump packets using given network interface

- **-p**

  show only packets from given port range (default range is 9419-9422, so by default only MFS packets are shown)

- **-f**

  define pcap filter to filter packets

- **-c**

  dump only *PCOUNT* packets and exit

- **-s**

  dump only first *MBYTES* bytes of each packet

- **-e**

  do not display given commands

- **-o**

  show only given commands

- **-x**

  do not display mfs maintenance commands (such as CSTOMA\_SPACE or CLTOMA\_FUSE\_TIME\_SYNC)

- **-y**

  do not display open/close connections packets

- **-n**

  show ANTOAN\_NOP command (disabled by default)

## REPORTING BUGS

Report bugs to \<bugs@moosefs.com\>.

## COPYRIGHT

Copyright (C) 2026 Jakub Kruszona-Zawadzki, Saglabs SA

This file is part of MooseFS.

MooseFS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 (only).

MooseFS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, see \<https://www.gnu.org/licenses/\>.