获取不到正确的IP

Question

公司是用局域网的，我用Request.UserHostAddress获取某个部门的IP，该部门的IP固定在10.128.230.0~10.128.230.20.能获取这个部门其他同事的Ip都在这个范围，但只有一个同事的IP获取的一直是172.28.129.28.请问是不是该同事的电脑设置有问题，要怎样设置他的电脑。期间有让她把防火墙关闭掉都不能获取正确的IP

Answer 1

#region 透过代理获取用户IP地址
            /// <summary>
            /// 透过代理获取用户IP地址
            /// </summary>
            /// <returns></returns>
            public static string GetUserIP()
            {
                string User_IP;
                if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
                {
                    User_IP = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                else
                {
                    User_IP = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
                }
                return User_IP;
            }
        #endregion

Answer 2

没有遇到过这个问题.我一直用这个.你可以试试
        /// <summary>
        /// 获取IP
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public string GetClientIP(HttpContext context)
        {
            string strIPAddr;
            string strHttpXForwardedFor = context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (string.IsNullOrEmpty(strHttpXForwardedFor) ||
                (strHttpXForwardedFor.IndexOf("unknown") >= 0))
            {
                strIPAddr = context.Request.ServerVariables["REMOTE_ADDR"];
            }
            else if (strHttpXForwardedFor.IndexOf(",") >= 0)
            {
                strIPAddr = strHttpXForwardedFor.Substring(0, strHttpXForwardedFor.IndexOf(","));
            }
            else if (strHttpXForwardedFor.IndexOf(";") >= 0)
            {
                strIPAddr = strHttpXForwardedFor.Substring(0, strHttpXForwardedFor.IndexOf(";"));
            }
            else
            {
                strIPAddr = strHttpXForwardedFor;
            }
            return strIPAddr.Trim();
        }