07-30-2010
A few things to check from the basic to the more obscure.
1) Can you ftp within the server both to localhost and the server name?
ftp localhost
ftp localservername
2) Is the server name and IP address consistent?
Check on every machine:
nslookup servername1
nslookup servername2
3) Are there rogue .netrc files ?
Search each source computer for .netrc files and inspect permissions and contents.
4) FTP can be crippled by certain physical network configuration issues
No network port on the server, switch or hub should be set to auto-detect or auto-negotiate. The mess this can create is very difficult to detect but a common symptom is connections dropping to half-duplex and CRC errors.
A cold start of network components and then servers will often cure these symptoms for a while. A random order cold start (e.g. after a power failure) will often cause these symptoms. Re-patching a network connection is another way of causing these symptoms.
5) FTP does not like the "jumbo packets" setting in any network components and will often hang.
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LEARN ABOUT OPENSOLARIS
netrc
netrc(4) File Formats netrc(4)
NAME
netrc - file for ftp remote login data
DESCRIPTION
The .netrc file contains data for logging in to a remote host over the network for file transfers by ftp(1). This file resides in the
user's home directory on the machine initiating the file transfer. Its permissions should be set to disallow read access by group and oth-
ers. See chmod(1).
Tokens can be separated by SPACE, TAB, or NEWLINE characters. The following tokens are supported:
account string Supply an additional account password. If this token is present, the auto-login process supplies the specified string if
the remote server requires an additional account password. If the remote server does not require an additional account
password, the auto-login process initiates an ACCT command.
default Same as machine name, except that default matches any name. There can be only one default token, and it must be after
all machine tokens. The default token is normally used as follows:
default login anonymous password user@site
Such an entry gives the user automatic anonymous ftp login to machines not specified in .netrc.
login name Identify a user on the remote machine. If this token is present, the auto-login process initiates a login using the
specified name.
machine name Identify a remote machine name. The auto-login process searches the .netrc file for a machine token that matches the
remote machine specified on the ftp command line or as an open command argument. Once a match is made, the subsequent
.netrc tokens are processed, stopping when the EOF is reached or another machine token is encountered.
macdef name Define a macro. This token functions the same as ftp macdef. A macro is defined with the specified name; its contents
begin with the next .netrc line and continue until a null line (consecutive NEWLINE characters) is encountered. If a
macro named init is defined, it is automatically executed as the last step in the auto-login process.
password string Supply a password. If this token is present, the auto-login process supplies the specified string if the remote server
requires a password as part of the login process. If this token is present in the .netrc file, ftp aborts the auto-login
process if the .netrc is readable by anyone besides the user.
skipsyst Skip the SYST command that is sent by default to all remote servers upon connection. The system command is what enables
the automatic use of binary mode rather than the protocol default ascii mode.
As some older servers cannot handle the ftp command, this directive is provided to allow inter-operability with these
servers.
EXAMPLES
Example 1 A Sample .netrc File
A .netrc file containing the following line:
machine ray login demo password mypassword
allows an autologin to the machine ray using the login name demo with password mypassword.
FILES
~/.netrc
SEE ALSO
chmod(1), ftp(1), in.ftpd(1M)
SunOS 5.11 25 Aug 2006 netrc(4)