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c# dns.GetHostEntry() not returning valid ip address
How do I calculate someone's age in C#?What is the difference between String and string in C#?Hidden Features of C#?Cast int to enum in C#How do you give a C# Auto-Property a default value?How do I enumerate an enum in C#?What are the correct version numbers for C#?How do I get a consistent byte representation of strings in C# without manually specifying an encoding?Get IPv4 addresses from Dns.GetHostEntry()Why not inherit from List<T>?
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I inherited code that makes the call to Dns.GetHostEntry("10.1.12.180") (or by using the dns of the machine) and the IPHostEntry that is returned has a different ip address "10.100.160.18" If I run the code on the same subdomain (10.1.12) it works. Another developer using WireShark said he doesn't see the call being made and that I must be overriding the GetHostEntry call to return that specific address (we used to have that address on the network). I'm not overriding the call.
I know that I can circumvent the issue by using IPAddress.Parse() since I do have the correct ip address.
Any ideas why it would return the incorrect ip? It used to work. I have checked with IT and they don't have any mappings to the incorrect IP address. The only difference it that the machine with ip address 10.1.12.180 was updated to windows 10 (from Windows 7).
I have isolated the call so that I have a project that just makes the Dns.GetHostEntry() call.
c# dns system.net
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
add a comment |
I inherited code that makes the call to Dns.GetHostEntry("10.1.12.180") (or by using the dns of the machine) and the IPHostEntry that is returned has a different ip address "10.100.160.18" If I run the code on the same subdomain (10.1.12) it works. Another developer using WireShark said he doesn't see the call being made and that I must be overriding the GetHostEntry call to return that specific address (we used to have that address on the network). I'm not overriding the call.
I know that I can circumvent the issue by using IPAddress.Parse() since I do have the correct ip address.
Any ideas why it would return the incorrect ip? It used to work. I have checked with IT and they don't have any mappings to the incorrect IP address. The only difference it that the machine with ip address 10.1.12.180 was updated to windows 10 (from Windows 7).
I have isolated the call so that I have a project that just makes the Dns.GetHostEntry() call.
c# dns system.net
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
What doesDns.GetHostEntry(Dns.GetHostName()).AddressListgive you?
– silkfire
Mar 22 at 19:57
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58
add a comment |
I inherited code that makes the call to Dns.GetHostEntry("10.1.12.180") (or by using the dns of the machine) and the IPHostEntry that is returned has a different ip address "10.100.160.18" If I run the code on the same subdomain (10.1.12) it works. Another developer using WireShark said he doesn't see the call being made and that I must be overriding the GetHostEntry call to return that specific address (we used to have that address on the network). I'm not overriding the call.
I know that I can circumvent the issue by using IPAddress.Parse() since I do have the correct ip address.
Any ideas why it would return the incorrect ip? It used to work. I have checked with IT and they don't have any mappings to the incorrect IP address. The only difference it that the machine with ip address 10.1.12.180 was updated to windows 10 (from Windows 7).
I have isolated the call so that I have a project that just makes the Dns.GetHostEntry() call.
c# dns system.net
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
I inherited code that makes the call to Dns.GetHostEntry("10.1.12.180") (or by using the dns of the machine) and the IPHostEntry that is returned has a different ip address "10.100.160.18" If I run the code on the same subdomain (10.1.12) it works. Another developer using WireShark said he doesn't see the call being made and that I must be overriding the GetHostEntry call to return that specific address (we used to have that address on the network). I'm not overriding the call.
I know that I can circumvent the issue by using IPAddress.Parse() since I do have the correct ip address.
Any ideas why it would return the incorrect ip? It used to work. I have checked with IT and they don't have any mappings to the incorrect IP address. The only difference it that the machine with ip address 10.1.12.180 was updated to windows 10 (from Windows 7).
I have isolated the call so that I have a project that just makes the Dns.GetHostEntry() call.
c# dns system.net
c# dns system.net
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
asked Mar 22 at 19:52
Bo Knows DiddleyBo Knows Diddley
34
34
What doesDns.GetHostEntry(Dns.GetHostName()).AddressListgive you?
– silkfire
Mar 22 at 19:57
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58
add a comment |
What doesDns.GetHostEntry(Dns.GetHostName()).AddressListgive you?
– silkfire
Mar 22 at 19:57
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58
What does
Dns.GetHostEntry(Dns.GetHostName()).AddressList give you?– silkfire
Mar 22 at 19:57
What does
Dns.GetHostEntry(Dns.GetHostName()).AddressList give you?– silkfire
Mar 22 at 19:57
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58
add a comment |
1 Answer
1
active
oldest
votes
IPHostEntry returns a list of addresses, not a single IP address. You should iterate IPHostEntry.AddressList to see all of them.
See here for example usage of Dns.GetHostEntry.
Also be aware Windows can override DNS lookups via the hosts file. This is, unfortunately, a common way to hijack DNS lookups on a specific machine.
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
IPHostEntry returns a list of addresses, not a single IP address. You should iterate IPHostEntry.AddressList to see all of them.
See here for example usage of Dns.GetHostEntry.
Also be aware Windows can override DNS lookups via the hosts file. This is, unfortunately, a common way to hijack DNS lookups on a specific machine.
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
add a comment |
IPHostEntry returns a list of addresses, not a single IP address. You should iterate IPHostEntry.AddressList to see all of them.
See here for example usage of Dns.GetHostEntry.
Also be aware Windows can override DNS lookups via the hosts file. This is, unfortunately, a common way to hijack DNS lookups on a specific machine.
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
add a comment |
IPHostEntry returns a list of addresses, not a single IP address. You should iterate IPHostEntry.AddressList to see all of them.
See here for example usage of Dns.GetHostEntry.
Also be aware Windows can override DNS lookups via the hosts file. This is, unfortunately, a common way to hijack DNS lookups on a specific machine.
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
IPHostEntry returns a list of addresses, not a single IP address. You should iterate IPHostEntry.AddressList to see all of them.
See here for example usage of Dns.GetHostEntry.
Also be aware Windows can override DNS lookups via the hosts file. This is, unfortunately, a common way to hijack DNS lookups on a specific machine.
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
answered Mar 22 at 20:01
Zer0Zer0
3,7281229
3,7281229
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
add a comment |
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
I do get a list however, it is a list of one address which is incorrect. I had not thought of checking the hosts file but it contains no mappings.
– Bo Knows Diddley
Mar 26 at 17:08
add a comment |
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What does
Dns.GetHostEntry(Dns.GetHostName()).AddressListgive you?– silkfire
Mar 22 at 19:57
It returns a list of ip address which match what I get when I do an ipconfig.
– Bo Knows Diddley
Mar 26 at 16:58