HttpContext IP Problem

Question

I have a problem when I use HttpContext.Current.Request.UserHostAddress, some times returns "192.168.0.17" (IPv4) and some times returns "fe80::99be:a05d:7938:1c30%8" (IPv6), calling from the same computer and navigator.

What I do to return always IPv4?

score 3 · Answer 1 · edited Aug 24 '16 at 20:14

Check out this post on 4GuysFromRolla and see if it helps at all. I think this is the information you're looking for.

https://web.archive.org/web/20201028122055/https://aspnet.4guysfromrolla.com/articles/071807-1.aspx

~md5sum~

 public static string GetIP4Address()
  {
    string IP4Address = String.Empty;

    foreach (IPAddress IPA in Dns.GetHostAddresses(HttpContext.Current.Request.UserHostAddress))
    {
      if (IPA.AddressFamily.ToString() == "InterNetwork")
      {
        IP4Address = IPA.ToString();
        break;
      }
    }

    if (IP4Address != String.Empty)
    {
      return IP4Address;
    }

    foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
    {
      if (IPA.AddressFamily.ToString() == "InterNetwork")
      {
        IP4Address = IPA.ToString();
        break;
      }
    }

    return IP4Address;
  }

score 2 · Accepted Answer · answered Nov 12 '09 at 20:04

2

Found a solution that somebody hacked up. Can't say if it'll work, tho =)

http://www.eggheadcafe.com/software/aspnet/30078410/request-object.aspx

answered Nov 12 '09 at 20:04

David Hedlund

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Beat me with a virtually identical solution by mere seconds. +1 – Nathan Wheeler Nov 13 '09 at 15:26
@md5sum: well the good news, then, is none of us deserves the creds for the actual code ;) – David Hedlund Nov 13 '09 at 15:31
yup, dead link - which is why SO recommends posting the answer, not just a link to the answer. :/ – Mark Nadig Aug 24 '16 at 16:53
Correct. Alas I cannot delete an accepted answer. As the comments by Nathan points out, though, this was the same solution as in this answer – David Hedlund Aug 24 '16 at 20:16

HttpContext IP Problem

2 Answers2