Unable to open remote connections


 
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Operating Systems Solaris Unable to open remote connections
# 1  
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.
# 2  
Old 08-08-2007
checked the firewall rules. Try to do iptables -F and give it a try.

Also, check the port using nmap

nmap hostname
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