Hi,
Users are connecting thru a KCML Client to UNIX machine, and I want to know which TCP/UDP port that client uses? How can I check the port of a user logged in?
Regards,
Tayyab (2 Replies)
hi guys
My linux server have SNMP configure port by default is 161 (UDP)
now my monitor team - who are using Nagios - say the server are not being monitor
so check netstat -lnu and I see all is OK and snmp service is running fine
what else should I check about this port 161? to see if it is... (0 Replies)
May I know what is the TCP/UCP port range for any default AIX NFS? Based on rpcinfo -p, I got the following output:
program vers proto port service
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100000 4 ... (4 Replies)
Hello,
I'm trying to write a small c application to test a tcp port. This works fine for the most part but the default timeout on the connect is very long. I have been reading many posts but and it looks like I need to set the socket to be non-blocking and poll for a result. I have been totally... (2 Replies)
Hi ,
Currently DELL OMSA SNMP sends data through default udp port 161.I want my custom SNMP MIB also to send data in the same udp port 161.Whether its possible.If yes where to configure .I tried starting my custom MIB in udp port 161,but it throws port already in use.Kindly guide. (0 Replies)
Hi ,
Currently DELL OMSA SNMP sends data through default udp port 161.I want my custom SNMP MIB also to send data in the same udp port 161.Whether its possible.If yes where to configure .I tried starting my custom MIB in udp port 161,but it throws port already in use.Kindly guide. (1 Reply)
Hi,
I am trying to set up a dev environment and I have Ubuntu server (10.16.1.92) and a CentOS VM (10.16.3.235) on this. On the CentOS I have a program running on port 5433. Now my problem is that I am unable to telnet this port from another Windows server whereas I can telnet port 22 from... (5 Replies)
I want to test the connectivity to an IP with Port number = xxxx.
I only know telnet can do it. For example, telnet <IP> <port>.
But I don't have telnet installed (no package) on my Red Hat Linux server.
I searched the Internet and realized that I will need either the installation media which... (2 Replies)
Hello,
I am pretty unskilled in bash and I need some script and my skills ale limited (yet) I am learning but situation now needs some more skills.
is there possibility to simply check IP address with ports from csv file?
My csv has hundred of IPs in this format
... (9 Replies)
Discussion started by: Keagan
9 Replies
LEARN ABOUT DEBIAN
udp
UDP(4) BSD Kernel Interfaces Manual UDP(4)NAME
udp -- Internet User Datagram Protocol
SYNOPSIS
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int
socket(AF_INET, SOCK_DGRAM, 0);
DESCRIPTION
UDP is a simple, unreliable datagram protocol which is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP
sockets are connectionless, and are normally used with the sendto(2) and recvfrom(2) calls, though the connect(2) call may also be used to
fix the destination for future packets (in which case the recv(2) or read(2) and send(2) or write(2) system calls may be used).
UDP address formats are identical to those used by TCP. In particular UDP provides a port identifier in addition to the normal Internet
address format. Note that the UDP port space is separate from the TCP port space (i.e., a UDP port may not be ``connected'' to a TCP port).
In addition broadcast packets may be sent (assuming the underlying network supports this) by using a reserved ``broadcast address''; this
address is network interface dependent.
Options at the IP transport level may be used with UDP; see ip(4).
ERRORS
A socket operation may fail with one of the following errors returned:
[EISCONN] when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the desti-
nation address specified and the socket is already connected;
[ENOTCONN] when trying to send a datagram, but no destination address is specified, and the socket has not been connected;
[ENOBUFS] when the system runs out of memory for an internal data structure;
[EADDRINUSE] when an attempt is made to create a socket with a port which has already been allocated;
[EADDRNOTAVAIL] when an attempt is made to create a socket with a network address for which no network interface exists.
MIB VARIABLES
The udp protocol implements a number of variables in the net.inet branch of the sysctl(3) MIB.
UDPCTL_CHECKSUM (udp.checksum) Enable udp checksums (enabled by default).
UDPCTL_MAXDGRAM (udp.maxdgram) Maximum outgoing UDP datagram size
UDPCTL_RECVSPACE (udp.recvspace) Maximum space for incoming UDP datagrams
udp.log_in_vain For all udp datagrams, to ports on which there is no socket listening, log the connection attempt (disabled by default).
udp.blackhole When a datagram is received on a port where there is no socket listening, do not return an ICMP port unreachable message.
(Disabled by default. See blackhole(4).)
SEE ALSO getsockopt(2), recv(2), send(2), socket(2), blackhole(4), inet(4), intro(4), ip(4)HISTORY
The udp protocol appeared in 4.2BSD.
BSD June 5, 1993 BSD