不知道如果IP在LAN或INET上 [英] At a loss figuring out if an IP is on LAN or INET
问题描述
我正在编写一个与内部和外部计算机通信的应用程序
我的路由器。所以我需要通过远程主机的IP地址确定是否需要
来发送我的局域网IP或我的互联网IP。有人建议你拿着IP
和我的子网掩码，但我想出了这个：
我的IP：192.168.0.14
面膜：255.255.255.0
结果：192.168.0.0
我应该比较前两个八位字节吗？或者是否存在
会导致错误结果的情况？
特里，
AFAIK有三个供内部使用的范围
10.xxx
150.xxx
192.168.xx
如果我没有完全错误，那么前两个应该就够了。
Cor
" Terry Olsen" <到****** @ hotmail.com> schreef in bericht
news：ug ************** @ TK2MSFTNGP05.phx.gbl ...我正在写作一个应用程序，它与我的路由器内外的计算机进行通信。所以我需要通过远程主机的IP地址确定
我是否需要向他们发送我的LAN IP或我的Internet IP。有人建议使用IP和我的子网掩码，但我想出了这个：
我的IP：192.168.0.14
面具：255.255.255.0
结果：192.168.0.0
我应该比较前两个八位字节吗？或者是否存在这样会导致错误结果的情况？
Terry，
很抱歉，当我发送它时，我意识到它不是150，所以我在谷歌搜索了它的价格。
10.xxx
172.16.xx - 172.31.xx
192.168.xx
Cor
< blockquote>纠正你。
针对最后两个八位字节的测试应该足以确定
可路由与非可路由....也就是内部/外部。
现在，如果内部网络被配置为具有ROUTABLE的IP方案
IP（可以这样做 - 为什么？我不会'不知道......那会让它变得有点敏感。
-
Grumpy Aero Guy
" Cor Ligthert [MVP]" <无************ @ planet.nl>在消息中写道
新闻：％2 **************** @ TK2MSFTNGP03.phx.gbl ...
特里，
AFAIK有三个范围供内部使用
10.xxx
150.xxx
192.168.xx
如果我没有完全错误，那么前两个应该足够了。
Terry Olsen <到****** @ hotmail.com> schreef in bericht
新闻：ug ************** @ TK2MSFTNGP05.phx.gbl ...我正在写一个通讯的应用程序我的路由器外部和计算机都有。所以我需要通过远程主机的IP地址确定
我是否需要向他们发送我的LAN IP或我的Internet IP。有人建议使用IP和我的子网掩码，但我想出了这个：
我的IP：192.168.0.14
面具：255.255.255.0
结果：192.168.0.0
我应该比较前两个八位字节吗？或者是否存在这样会导致错误结果的情况？
I''m writing an app that communicates with computers both inside and outside
my router. So I need to determine by the remote host''s IP address if I need
to send them my LAN IP or my Internet IP. Someone suggested AND''ing the IP
and my Subnet Mask but I come up with this:
My IP: 192.168.0.14
Mask: 255.255.255.0
Result: 192.168.0.0
Should I just compare the first two octets? Or are there situations where
this would provide incorrect results?
Terry,
AFAIK are there three ranges reserved for internal use
10.x.x.x
150.x.x.x
192.168.x.x
If I am not completely wrong than the first two should therefore be enough.
Cor
"Terry Olsen" <to******@hotmail.com> schreef in bericht
news:ug**************@TK2MSFTNGP05.phx.gbl...I''m writing an app that communicates with computers both inside and
outside my router. So I need to determine by the remote host''s IP address
if I need to send them my LAN IP or my Internet IP. Someone suggested
AND''ing the IP and my Subnet Mask but I come up with this:
My IP: 192.168.0.14
Mask: 255.255.255.0
Result: 192.168.0.0
Should I just compare the first two octets? Or are there situations where
this would provide incorrect results?
Terry,
Sorry when I had sent it I realized me that it was not the 150 so I searched
for it in Google.
10.x.x.x
172.16.x.x - 172.31.x.x
192.168.x.x
Cor
corrrect you are.
Testing against the forst two octets should be sufficient to determine
routable vs. non routable.... aka internal/external.
NOW, if an internal network is configured to have an IP scheme with ROUTABLE
IPs ( which CAN be done --- WHY? I wouldn''t know)... that would make it a
bit touchy.
--
Grumpy Aero Guy
"Cor Ligthert [MVP]" <no************@planet.nl> wrote in message
news:%2****************@TK2MSFTNGP03.phx.gbl...Terry,
AFAIK are there three ranges reserved for internal use
10.x.x.x
150.x.x.x
192.168.x.x
If I am not completely wrong than the first two should therefore be
enough.
Cor
"Terry Olsen" <to******@hotmail.com> schreef in bericht
news:ug**************@TK2MSFTNGP05.phx.gbl...I''m writing an app that communicates with computers both inside and
outside my router. So I need to determine by the remote host''s IP address
if I need to send them my LAN IP or my Internet IP. Someone suggested
AND''ing the IP and my Subnet Mask but I come up with this:
My IP: 192.168.0.14
Mask: 255.255.255.0
Result: 192.168.0.0
Should I just compare the first two octets? Or are there situations where
this would provide incorrect results?
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