In general, it is very possible to ping a system that you cannot telnet to.
Telnet is just a service. Many systems (mine, for example,if they are
connected to the Internet), do not run telnetd, the daemon that provides the
telnet service. The service can fail without the entire server failing.
In your specific case, obviously telnetd (or an equivalent daemon) was
running initially. Without knowing a lot more than you have told us, I can't
suggest why telnet stopped working -- more rpecisely, I can suggest an
enormous number of possibilities, but each individually is low probability.
Maybe something happened to telnetd. Maybe something happened to inetd.
Maybe the system will allow only 1 telnet session at a time from a given IP
address, and it hadn't finished closing your interrupted session. Maybe the
process table was full. Maybe ... you get the idea.
If you actually told us what the "some stats" were from your ping, that
might suggest some possibility. Similarly, information about *how* telnet
failed -- what message it gave you -- might be informative. But I don't do
troubleshooting based on a report of what messages were "like" ... it
involves too much guesswork.
Really, this is a question best posed to the sysadmin you spoke to.
At 09:36 AM 5/3/00 +0530, Rajesh P K wrote:
>Hi all,
>Lately i was running a program on a server by telneting,the program was
>running without a break,i tried to stop it with
>crtl-c,crtl-z etc but of no use ,i just closed the telnet window to solve
>it,but when i tried to telnet immediately after that ,i could not do it,i
>wonder if a program can crash a server like this.When i consulted the admin
>he pinged to the machine succesfully and thaught it was working perfect ,i
>could also ping from my machine ,it gave some stats like 33% error free
>etc ,My doubt is how is it possible to ping while you cannot telnet to the
>system\
------------------------------------"Never tell me the odds!"---
Ray Olszewski -- Han Solo
Palo Alto, CA [EMAIL PROTECTED]
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