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Operating Systems Solaris Unable to open remote connections Post 302130923 by red_crab on Wednesday 8th of August 2007 09:49:40 AM
Old 08-08-2007
Unable to open remote connections

Hello everybody,
This is an unusual problem that I am facing on my Solaris 9 on Sun Blade 150 workstation. I can ping remote machines (outside subnet) but I can't open up a connection/port on those machines.

For example, `ping ftp.xyz.com` gives ftp.xyz.com is alive but if I do a `ftp ftp.xyz.com` or `telnet ftp.xyz.com 21`; it just gives "Trying ftp.xyz.com..." and fails. This holds true for ALL remote machines for all services (ftp, telnet, http). Gateway/routing is not the problem since pinging works. Name resolution in not a problem since `dig` also works. I haven't configured TCP wrappers or ipfilters. So where can be the problem?

Am I missing something?

Interesting part of the problem is that I can successfully telnet or ftp TO this machine (from a remote machine). But here also, there is a problem: Incoming connections (telnet or FTP) get dropped automatically after a minute or so. Although I can reconnect immediately.

Problem Summary: Outgoing connections are blocked and incoming connections work but get get dropped after some time.

Can anybody come up with something helpful at earliest? Thanks in advance.
 

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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)). The following tokens are recognized; they may be separated by SPACE, TAB, or NEWLINE characters: 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. 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 will initiate a login using the specified name. password string Supply a password. If this token is present, the auto-login process will supply the specified string if the remote server requires a password as part of the login process. Note: if this token is present in the .netrc file, ftp will abort the auto-login process if the .netrc is readable by anyone besides the user. 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 will initiate an ACCT command. 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. 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 5.10 3 Jul 1990 netrc(4)
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