Hi, Even I am in the same opinion as Tapani. `nc` or `nmap` actually shows only whether the port is open or not. But what I need is to check if an SMTP server is listening in that port. So I guess the best tool is telnet and to check 220 status. I don't think that I'll have to use KILL as there won't be any firewall block in between two machines. `nc` is a wonderful tool and with -w option works perfect. But I think I ll go with `telnet`. Regards, Kurian Thayil. On Thu, 2009-04-16 at 17:07 +0300, Tapani Tarvainen wrote: > Neater, yes, but the functionality is not equivalent. > As I understood it, OP specifically wanted to test if they > can connect to the mail server, not just if port 25 is open. > > Also, common though nc nowadays is, it's still not present > in every system, and if you have to install a new program > for the purpose you might as well install swaks. > > Finally, irrelevant though it may be to Debian, portability > will suffer from every new external program you need. > Ugly though that kill hack is, it'll work in more or less > every *ix-related box, as it only uses standard POSIX tools. > -- Kurian Mathew Thayil. (GPG KeyID: E232394F)
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