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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)						     Kernel Interfaces Manual							  netrc(4)

NAME
netrc, .netrc - Specifies automatic login information for ftp SYNOPSIS
$HOME/.netrc DESCRIPTION
The .netrc file contains the information used by the automatic login (autologin) feature of the ftp command. It is a hidden file in your home directory and must be owned by the user logging in, or by the root user. If the .netrc file contains a login password, the file's permissions must be set to 600 (read and write by owner only). The .netrc file can contain the following entries (separated by spaces, tabs, or newlines): Where host is the name of a remote host. This entry begins the definition of the autologin process for the specified host. All following entries up to the next machine entry or the end of the file apply to that host. This is the same as machine, except that default matches any name. There can be only one default token, and it must appear after all machine tokens. This is normally used as follows: default login anonymous password user@site The preceding command line gives the user automatic anonymous ftp login to machines not specified in .netrc. This can be overriden by using the -n flag to disable autologin. Where user is the username to use at the remote host. If this entry is found, the autologin process initiates a login using the specified name. If this entry is missing, the autologin process fails. Where password is the login password to be used. The autologin process supplies this password to the remote server. A login password must be established at the remote host and that pass- word must be entered in this file, or the autologin process fails and you are prompted for the login password. Where password is the account password to be used. If this entry is found and an account password is required at the remote host, the autologin process supplies the password to the remote server. If the remote host requires an account password but this entry is missing, the autologin process prompts for the account password. Where macro is the name of an ftp subcommand macro. The macro definition starts on the following line and is defined to contain all of the following ftp subcommands up to the next blank line. If the macro is named init, ftp executes the macro upon successful completion of the autologin process. FILES
Contains automatic login information. RELATED INFORMATION
Commands: ftp(1). delim off netrc(4)
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