question about trace routes - 未名空间MITBBS历史存档

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question about trace routes

question about trace routes# Unix - 噫吁兮，危乎高哉

b*y2003-10-06 07:10

1 楼

how do you know the machine that you traced to was non-existent instead of
just down or not responding?
Thanks very much

m*e2003-10-06 07:10

2 楼

You don't know.

【在 b****y 的大作中提到】

: how do you know the machine that you traced to was non-existent instead of
: just down or not responding?
: Thanks very much

c*t2003-10-06 07:10

3 楼

If you were given an IP. Then in general, you don't know.
If is a domain name, it is possible to use nslookup to figure out if
it is fake name if DNS says it does not exist.
If you read news, Net Finder by VeriSign is defeating this mechanism
by always respond it and redirect any traffic of mispelled .com and
.net address to its advertisement server. Fortunately, it is temporarily
down for now. This service is very bad also because it looks as if
VeriSign owns all the domain names even if the

【在 b****y 的大作中提到】

: how do you know the machine that you traced to was non-existent instead of
: just down or not responding?
: Thanks very much