Ruby 中的反向 DNS?
我所处的环境中有很多计算机尚未使用过 正确盘点。 基本上,没有人知道哪个 IP 与哪个 IP 对应 MAC 地址和主机名。 所以我写了以下内容:
# This script goes down the entire IP range and attempts to
# retrieve the Hostname and mac address and outputs them
# into a file. Yay!
require "socket"
TwoOctets = "10.26"
def computer_exists?(computerip)
system("ping -c 1 -W 1 #{computerip}")
end
def append_to_file(line)
file = File.open("output.txt", "a")
file.puts(line)
file.close
end
def getInfo(current_ip)
begin
if computer_exists?(current_ip)
arp_output = `arp -v #{current_ip}`
mac_addr = arp_output.to_s.match(/..:..:..:..:..:../)
host_name = Socket.gethostbyname(current_ip)
append_to_file("#{host_name[0]} - #{current_ip} - #{mac_addr}\n")
end
rescue SocketError => mySocketError
append_to_file("unknown - #{current_ip} - #{mac_addr}")
end
end
(6..8).each do |i|
case i
when 6
for j in (1..190)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
when 7
for j in (1..255)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
when 8
for j in (1..52)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
end
end
除了找不到反向 DNS 之外,一切正常。
我得到的示例输出是这样的:
10.26.6.12 - 10.26.6.12 - 00:11:11:9B:13:9F
10.26.6.17 - 10.26.6.17 - 08:00:69:9A:97:C3
10.26.6.18 - 10.26.6.18 - 08:00:69:93:2C:E2
如果我执行 nslookup 10.26.6.12 ,那么我会得到正确的反向 DNS,所以 这表明我的机器正在查看 DNS 服务器。
我尝试过Socket.gethostbyname
、gethostbyaddr
,但不起作用。
任何指导将不胜感激。
I'm in an environment with a lot of computers that haven't been
properly inventoried. Basically, no one knows which IP goes with which
mac address and which hostname. So I wrote the following:
# This script goes down the entire IP range and attempts to
# retrieve the Hostname and mac address and outputs them
# into a file. Yay!
require "socket"
TwoOctets = "10.26"
def computer_exists?(computerip)
system("ping -c 1 -W 1 #{computerip}")
end
def append_to_file(line)
file = File.open("output.txt", "a")
file.puts(line)
file.close
end
def getInfo(current_ip)
begin
if computer_exists?(current_ip)
arp_output = `arp -v #{current_ip}`
mac_addr = arp_output.to_s.match(/..:..:..:..:..:../)
host_name = Socket.gethostbyname(current_ip)
append_to_file("#{host_name[0]} - #{current_ip} - #{mac_addr}\n")
end
rescue SocketError => mySocketError
append_to_file("unknown - #{current_ip} - #{mac_addr}")
end
end
(6..8).each do |i|
case i
when 6
for j in (1..190)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
when 7
for j in (1..255)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
when 8
for j in (1..52)
current_ip = "#{TwoOctets}.#{i}.#{j}"
getInfo(current_ip)
end
end
end
Everything works except it does not find a Reverse DNS.
Sample output that I'm getting is this:
10.26.6.12 - 10.26.6.12 - 00:11:11:9B:13:9F
10.26.6.17 - 10.26.6.17 - 08:00:69:9A:97:C3
10.26.6.18 - 10.26.6.18 - 08:00:69:93:2C:E2
If I do nslookup 10.26.6.12
then I get the correct reverse DNS so
that shows that my machine is seeing the DNS server.
I have tried Socket.gethostbyname
, gethostbyaddr
, but it doesn't work.
Any guidance will be much appreciated.
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评论(3)
这也有效:
我不确定为什么 gethostbyaddr 也不起作用。
This also works:
I'm not sure why
gethostbyaddr
didn't also work.今天我还需要反向 DNS 查找,我发现了非常简单的标准解决方案:
它似乎使用超时,这在困难的情况下很有帮助。
Today I also needed reverse DNS lookup and I've found very simple standard solution:
It seems it uses timeout which helps in rough cases.
我会查看
getaddrinfo
。 如果将行: 替换为:
getaddrinfo 函数将返回数组的数组。 您可以在以下位置阅读更多相关信息:
Ruby Socket文档
I would check out
getaddrinfo
. If you replace the line:with:
The
getaddrinfo
function returns an array of arrays. You can read more about it at:Ruby Socket Docs