Chapter 6 – RouteFinder Software
Multi-Tech Systems, Inc. RouteFinderVPN RF760/660/600VPN User Guide (PN S000323D)
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Statistics & Logs > Networks
Network Connections
Click the
Network Connections
button to display the status of all current (active) network connections to or
from your RouteFinder. Information on the active protocol, receive queue, send queue, local address, foreign
address, and current state is shown for each of the RouteFinder‘s active Internet connections. It also shows
you all of the established TCP sessions and all of the TCP and UDP ports that the RouteFinder is listening to
for incoming connections. (Connections through the RouteFinder are not shown).
TCP Connections Example
Proto
Recv-Q
Send-Q
Local Address
Foreign Address
State
tcp
0
0
0.0.0.0:22
0.0.0.0:*
LISTEN
This output tells you that your RouteFinder is listening (
LISTEN
) at all (
0.0.0.0
) interfaces for incoming requests to
port 22 (ssh); the remote IP address is
ANY
(
0.0.0.0
) and the remote port does not care (the
*
in the
Foreign
Address
column indicates
ANY
).
How to Read the Active Internet Connections part of the table
Proto
Protocol - TCP or UDP (RAW sockets are not supported).
Recv-Q
Receive Queue - An entry here means that the IP stack had received data at the moment you
requested the output.
Send-Q
Send Queue - An entry here means that the IP stack had sent data at the moment you requested the
output.
Local Address
Shows the local (Servers) IP address and the port separated by a colon (
:
). If you find here, for
example,
192.168.2.43:443
, you know that there is an active HTTPS session.
Foreign Address
The destination IP address and port (for example
192.168.2.40:1034
).
State
Status of the connection – Sets of possible states reported are, for example:
LISTEN, ESTABLISHED. TIME_WAIT.
UNIX Connections Example
Proto
RefCnt
Flags
Type
State
PID Program name
UNIX
3
ACC
SOCK_STREAM
CONNECTED
609/syslog-ng
Proto
Protocol: UNIX
RefCnt
Reference Count – Attached processes via this socket.
Flags
Flags Displayed – Flags displayed are SO-ACCEPTON (displayed as ACC), SO_WAITDATA (W), or
SO_NOSPACE (N). SO-ACCEPTON is used on unconnected sockets if their corresponding
processes are waiting for a connect request. The other flags are not of normal interest.
Type
Shows types of socket access:
SOCK_DGRAM – The socket is used in Datagram (connectionless) mode.
SOCK_STREAM – This is a stream (connection) socket.
SOCK_RAW – The socket is used as a raw socket.
SOCK_RDM – This one serves reliably-delivered messages.
SOCK_SEQPACKET – This is a sequential packet socket.
SOCK_PACKET – Raw interface access socket.
UNKNOWN
State
This field contains one of the following keywords:
FREE – The socket is not allocated.
LISTENING – The socket is listening for a connection request. Such sockets are only included in the
output if you specify
- - listening (-I )
or
- -all (-a)
option.
CONNECTING – The socket is about to establish a connection.
CONNECTED – The socket is connected.
DISCONNECTING – The socket is disconnecting.
(empty) – The socket is not connected to another one.
PID/Program Name
Process ID (PID) and process name of the process that has the socket open.
