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Full Discussion: Telnet failed to localhost.
Top Forums UNIX for Beginners Questions & Answers Telnet failed to localhost. Post 303011618 by drysdalk on Saturday 20th of January 2018 05:50:56 PM
Old 01-20-2018
Hi,

Port 514 is the port for the syslog service, as you seem to have already determined. However, in those instances where a local logging service is configured to listen for incoming connections on port 514 it almost always uses UDP rather than TCP, so you can't test this by attempting to telnet to the port.

Exactly how you'd configure this all to work depends on your exact version of UNIX/your Linux distribution, what software you're using for logging, and of course if there is some external firewall that could be in the way even if your own local firewall definitely is not. But the best way to test it is to try to generate a logged event on a remote system that you have configured to log to your syslog server, and see if something gets logged or not.
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LEARN ABOUT SUSE

nfsd

rpc.nfsd(8)						      System Manager's Manual						       rpc.nfsd(8)

NAME

       rpc.nfsd - NFS server process

SYNOPSIS

       /usr/sbin/rpc.nfsd [options] nproc

DESCRIPTION

       The  rpc.nfsd  program  implements the user level part of the NFS service. The main functionality is handled by the nfsd kernel module. The
       user space program merely specifies what sort of sockets the kernel service should listen on, what NFS versions it should support, and  how
       many kernel threads it should use.

       The rpc.mountd server provides an ancillary service needed to satisfy mount requests by NFS clients.

OPTIONS

       -d  or  --debug
	      enable logging of debugging messages

       -H  or  --host hostname
	      specify  a  particular hostname (or address) that NFS requests will be accepted on. By default, rpc.nfsd will accept NFS requests on
	      all known network addresses.  Note that lockd (which performs file locking services for NFS) may still accept request on	all  known
	      network addresses.  This may change in future releases of the Linux Kernel.

       -p  or  --port port
	      specify a diferent port to listen on for NFS requests. By default, rpc.nfsd will listen on port 2049.

       -N  or  --no-nfs-version vers
	      This option can be used to request that rpc.nfsd does not offer certain versions of NFS. The current version of rpc.nfsd can support
	      both NFS version 2,3 and the newer version 4.

       -s  or  --syslog
	      By default, rpc.nfsd logs error messages (and debug messages, if enabled) to stderr. This option makes rpc.nfsd log  these  messages
	      to syslog instead. Note that errors encountered during option processing will still be logged to stderr regardless of this option.

       -T  or  --no-tcp
	      Disable rpc.nfsd from accepting TCP connections from clients.

       -U  or  --no-udp
	      Disable rpc.nfsd from accepting UDP connections from clients.

       nproc  specify  the  number of NFS server threads. By default, just one thread is started. However, for optimum performance several threads
	      should be used. The actual figure depends on the number of and the work load created by the NFS clients, but a useful starting point
	      is 8 threads. Effects of modifying that number can be checked using the nfsstat(8) program.

       Note  that  if  the NFS server is already running, then the options for specifying host, port, and protocol will be ignored.  The number of
       processes given will be the only option considered, and the number of active nfsd processes will be increased or decreased  to  match  this
       number.	In particular rpc.nfsd 0 will stop all threads and thus close any open connections.

NOTES

       If  the	program  is  built with TI-RPC support, it will enable any protocol and address family combinations that are marked visible in the
       netconfig database.

SEE ALSO

       rpc.mountd(8), exports(5), exportfs(8), rpc.rquotad(8), nfsstat(8), netconfig(5).

AUTHOR

       Olaf Kirch, Bill Hawes, H. J. Lu, G. Allan Morris III, and a host of others.

								    7 Aug 2006							       rpc.nfsd(8)
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