telnet , ftp response very very slow

telnet , ftp response very very slow

Post by Harinde » Sat, 25 Sep 1999 04:00:00



When i telnet or  ftp to my linux machine, i get very very slow response.
IBM Netfinity 300 with Redhat 6.0 running Oracle 8.0.5 with 384 Mb RAM.

The client shows that it has connected but I donot get the username prompt!

If I keep waiting for long enough, then it appears...

And also, once I have been able to do a telnet or an ftp, the session
continues fine.

 
 
 

telnet , ftp response very very slow

Post by Peter Greenwo » Sat, 25 Sep 1999 04:00:00




Quote:>When i telnet or  ftp to my linux machine, i get very very slow response.
..
>The client shows that it has connected but I donot get the username prompt!
>If I keep waiting for long enough, then it appears...

I've had this; in my case it turned out that named was trying to connect
off site, over a dial-up link that was down.  When it timed out, with
an unimportant error, the telent or ftp session came up.

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telnet , ftp response very very slow

Post by Jack Met » Sat, 25 Sep 1999 04:00:00


It could possibly be DNS...  If you have a valid /etc/resolv.conf,
remove it temporarily then try your ftp or telnet.





>>When i telnet or  ftp to my linux machine, i get very very slow response.
>..
>>The client shows that it has connected but I donot get the username prompt!
>>If I keep waiting for long enough, then it appears...

>I've had this; in my case it turned out that named was trying to connect
>off site, over a dial-up link that was down.  When it timed out, with
>an unimportant error, the telent or ftp session came up.

 
 
 

telnet , ftp response very very slow

Post by Ed All » Sun, 26 Sep 1999 04:00:00




>It could possibly be DNS...  If you have a valid /etc/resolv.conf,
>remove it temporarily then try your ftp or telnet.





>>>When i telnet or  ftp to my linux machine, i get very very slow response.
>>..
>>>The client shows that it has connected but I donot get the username prompt!
>>>If I keep waiting for long enough, then it appears...

>>I've had this; in my case it turned out that named was trying to connect
>>off site, over a dial-up link that was down.  When it timed out, with
>>an unimportant error, the telent or ftp session came up.

Or, better, list the IP and name of the machine you are telnetting from
in /etc/hosts.

Microsoft telnet asks the machine it is telnetting into to tell it what
name it will be known by, a reverse lookup (Never found where they use
the returned name).

/etc/hosts is checked before a DNS query starts so you can short circuit
the timeout without disturbing /etc/resolv.conf.

 
 
 

1. Slow Telnet response, fast rlogin response

I am running solaris 2.5 on a Sparc20, and I am using DNS for name service.  
When I Telnet to the machine from a remote site, I get very poor response.  It
works for about 1 minute, then hangs for ~1 minute.  If I Telnet to another
machine on our local ethernet, and rlogin to the Solaris 2.5 machine, the
response is fine.  This leads me to believe that it is not a problem with the
connection into my site.  Is there something I need to adjust.

Thanks,
                      Bryan Franz

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