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axlisten - Online in the Cloud

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This is the command axlisten that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



axlisten - monitor AX.25 traffic


axlisten [-8] [-a] [-c] [-h] [-i] [-p port] [-r] [-t] [-v]


Axlisten uses SOCK_PACKET facilities to provide a network monitor of all AX.25 traffic
heard by the system. Since KISS is implicitly promiscuous no special driver configurations
are needed.

This version displays standard AX.25, PE1CHL extended AX.25, NET/ROM, Rose, ARP, IP, ICMP,
TCP and UDP. It also displays IP, TCP, ICMP, TCP and UDP encapsulated within NET/ROM
frames. The program also displays AX.25 and IP encapsulated within an IP frame, but see
RFC1326 for reasons not to do so.

Axlisten makes an attempt at decoding some of the more common routing protocols. RSPF and
RIP (both “normal” and G8BPQs RIP98) are traced. JNOS style NET/ROM node polls are also

Axlisten can use colors to make the output more readable. The ncurses library is used to
accomplish this. Color support defaults to being disabled, and the -c parameter is used
to enable it.


-8 Indicates that the terminal is capable of printing 8-bit characters. This
parameter is required for the -i parameter to work.

-a Allow for the monitoring of outgoing frames as well as incoming ones.

-c Enable color support.

-h Dump the data portion of the packet in both hexadecimal and ASCII. The default
is to display data as ASCII only.

-i Map IBM codepage 437 characters 128-158 to their ISO-Latin-1 equivalents. This
is a hack for scandinavian users. This parameter is only valid when used with
the -8 and -c parameters.

-p port Monitor only those frames received on a particular port, by default all AX.25
devices are monitored.

-r Dump the data portion in a "readable" fashion, which is more suitable for
tracing plaintext AX.25 traffic. CR-LF conversion is done.

-t Displays a timestamp with each packet received.

-v Display the version.

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