Bizzare TCP/IP problem Post: 302493806

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Top Forums UNIX for Advanced & Expert Users Bizzare TCP/IP problem Post 302493806 by methyl on Thursday 3rd of February 2011 06:08:03 PM

02-03-2011

Registered User

If it is a MTU problem, try ftp with the parameter "-B 1". I have seen dramatic speed improvements because "-B 1" prevents "jumbo packets" which can be extremely slow unless every software and hardware component in the network was expecting this "enhancement" to the TCP/IP protocol.

Quote:

A while ago we had another fellow with a similar-looking problem -- he could connect on FTP, but the socket would transfer a few kilobytes then timeout, because his client's MTU was too large.

@Corona688
Hmm sounds like a classic unix-to-Microsoft ftp problem. It is a firewall problem because Imho Microsoft don't implement ftp correctly. In unix you can transmit small files on port 21 but need port 20 open to transmit large files. Nuff said.

If it's unix-to-unix lowering the MTU with the "-B" parameter to "ftp" can produce serious speed improvements on a mixed-manufacturer network.

Last edited by methyl; 02-03-2011 at 07:21 PM.. Reason: lots of afterhoughts

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LEARN ABOUT REDHAT

ssh-keysign

SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME

     ssh-keysign -- ssh helper program for hostbased authentication

SYNOPSIS

     ssh-keysign

DESCRIPTION

     ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during hostbased authentication with
     SSH protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the the global client configuration file /etc/ssh/ssh_config by setting
     HostbasedAuthentication to ``yes''.

     ssh-keysign is not intended to be invoked by the user, but from ssh(1).  See ssh(1) and sshd(8) for more information about hostbased authen-
     tication.

FILES

     /etc/ssh/ssh_config
	     Controls whether ssh-keysign is enabled.

     /etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key
	     These files contain the private parts of the host keys used to generate the digital signature.  They should be owned by root, read-
	     able only by root, and not accessible to others.  Since they are readable only by root, ssh-keysign must be set-uid root if hostbased
	     authentication is used.

SEE ALSO

     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)

AUTHORS

     Markus Friedl <markus@openbsd.org>

HISTORY

     ssh-keysign first appeared in OpenBSD 3.2.

BSD
								   May 24, 2002 							       BSD