diff --git a/Tun/Punchnet/DNSUtil.swift b/Tun/Punchnet/DNSUtil.swift
new file mode 100644
index 0000000..e2a89b0
--- /dev/null
+++ b/Tun/Punchnet/DNSUtil.swift
@@ -0,0 +1,121 @@
+////
+////  DNSUtil.swift
+////  punchnet
+////
+////  Created by 安礼成 on 2025/12/9.
+////
+//
+//import Foundation
+//import Network
+//
+//struct DNSUtil {
+//    static let dnsServers: [String] = ["100.100.100.100"]
+//    // dns请求包的目标地址
+//    static let dnsDestIpAddr: UInt32 = 1684300900
+//    
+//    // 判断是否是dns请求的数据包
+//    static func isDnsRequestPacket(ipPacket: IPPacket) -> Bool {
+//        return ipPacket.header.destination == dnsDestIpAddr
+//    }
+//    
+//    // DNS Header 结构
+//    struct DNSHeader {
+//        var id: UInt16
+//        var flags: UInt16
+//        var qdCount: UInt16
+//        var anCount: UInt16
+//        var nsCount: UInt16
+//        var arCount: UInt16
+//    }
+//
+//    // DNS Question 结构
+//    struct DNSQuestion {
+//        var name: String
+//        var type: UInt16
+//        var qclass: UInt16
+//    }
+//
+//    
+//
+//    // 解析域名（DNS Label 格式）
+//    func parseName(from data: Data, offset: inout Int) -> String {
+//        var labels: [String] = []
+//        while true {
+//            let length = Int(data[offset])
+//            offset += 1
+//            if length == 0 {
+//                break
+//            }
+//            let labelData = data[offset..<(offset + length)]
+//            if let label = String(data: labelData, encoding: .utf8) {
+//                labels.append(label)
+//            }
+//            offset += length
+//        }
+//        return labels.joined(separator: ".")
+//    }
+//
+//    // 解析 DNS 请求包
+//    func parseDNSRequest(_ data: Data) -> (DNSHeader, [DNSQuestion])? {
+//        guard data.count >= 12 else { return nil } // DNS Header 固定 12 字节
+//        
+//        let header = DNSHeader(
+//            id: data.uint16(at: 0),
+//            flags: data.uint16(at: 2),
+//            qdCount: data.uint16(at: 4),
+//            anCount: data.uint16(at: 6),
+//            nsCount: data.uint16(at: 8),
+//            arCount: data.uint16(at: 10)
+//        )
+//        
+//        var offset = 12
+//        var questions: [DNSQuestion] = []
+//        
+//        for _ in 0..<header.qdCount {
+//            let name = parseName(from: data, offset: &offset)
+//            let type = data.uint16(at: offset)
+//            offset += 2
+//            let qclass = data.uint16(at: offset)
+//            offset += 2
+//            
+//            let question = DNSQuestion(name: name, type: type, qclass: qclass)
+//            questions.append(question)
+//        }
+//        
+//        return (header, questions)
+//    }
+//
+//    // 测试示例
+//    let dnsPacket: [UInt8] = [
+//        0x12, 0x34, // Transaction ID
+//        0x01, 0x00, // Flags
+//        0x00, 0x01, // QDCOUNT
+//        0x00, 0x00, // ANCOUNT
+//        0x00, 0x00, // NSCOUNT
+//        0x00, 0x00, // ARCOUNT
+//        0x03, 0x77, 0x77, 0x77, // w w w
+//        0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, // g o o g l e
+//        0x03, 0x63, 0x6f, 0x6d, // c o m
+//        0x00, // End of name
+//        0x00, 0x01, // QTYPE A
+//        0x00, 0x01  // QCLASS IN
+//    ]
+//
+//    if let data = Data(exactly: dnsPacket), let (header, questions) = parseDNSRequest(data) {
+//        print("Transaction ID: \(header.id)")
+//        print("Flags: \(header.flags)")
+//        print("Questions count: \(header.qdCount)")
+//        for q in questions {
+//            print("Question: \(q.name), type: \(q.type), class: \(q.qclass)")
+//        }
+//    }
+//    
+//}
+//
+//// Helper 扩展：读取整数类型
+//private extension Data {
+//    func uint16(at offset: Int) -> UInt16 {
+//        let subdata = self[offset..<offset+2]
+//        return subdata.withUnsafeBytes { $0.load(as: UInt16.self).bigEndian }
+//    }
+//}
diff --git a/Tun/Punchnet/SDLContext.swift b/Tun/Punchnet/SDLContext.swift
index 6777549..07a6ab9 100644
--- a/Tun/Punchnet/SDLContext.swift
+++ b/Tun/Punchnet/SDLContext.swift
@@ -259,7 +259,7 @@ public class SDLContext: @unchecked Sendable {
                 }
                 
                 // 服务器分配的tun网卡信息
-                await self.didNetworkConfigChanged(devAddr: self.devAddr)
+                await self.didNetworkConfigChanged(devAddr: self.devAddr, dnsServers: ["100.100.100.100"])
                 self.aesKey = aesKey
                 
                 if upgradeType == .normal {
@@ -315,7 +315,7 @@ public class SDLContext: @unchecked Sendable {
                 self.devAddr = changeNetworkCommand.devAddr
                 
                 // 服务器分配的tun网卡信息
-                await self.didNetworkConfigChanged(devAddr: self.devAddr)
+                await self.didNetworkConfigChanged(devAddr: self.devAddr, dnsServers: ["100.100.100.100"])
                 self.aesKey = aesKey
                 
                 var commandAck = SDLCommandAck()
@@ -433,21 +433,24 @@ public class SDLContext: @unchecked Sendable {
 //    }
     
     // 网络改变时需要重新配置网络信息
-    private func didNetworkConfigChanged(devAddr: SDLDevAddr, dnsServers: [String]? = nil) async {
+    private func didNetworkConfigChanged(devAddr: SDLDevAddr, dnsServers: [String]) async {
         let netAddress = SDLNetAddress(ip: devAddr.netAddr, maskLen: UInt8(devAddr.netBitLen))
-        let routes = [Route(dstAddress: netAddress.networkAddress, subnetMask: netAddress.maskAddress)]
+        let routes = [
+            Route(dstAddress: netAddress.networkAddress, subnetMask: netAddress.maskAddress),
+            Route(dstAddress: "100.100.100.100", subnetMask: "255.255.255.255")
+        ]
         
         // Add code here to start the process of connecting the tunnel.
         let networkSettings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "8.8.8.8")
         networkSettings.mtu = 1460
         
         // 设置网卡的DNS解析
-        if let dnsServers {
-            networkSettings.dnsSettings = NEDNSSettings(servers: dnsServers)
-        } else {
-            networkSettings.dnsSettings = NEDNSSettings(servers: ["8.8.8.8", "114.114.114.114"])
-        }
         
+        let dnsSettings = NEDNSSettings(servers: dnsServers)
+        dnsSettings.searchDomains = ["punchnet.ts.net"]
+        dnsSettings.matchDomains = ["punchnet.ts.net"]
+        dnsSettings.matchDomainsNoSearch = false
+        networkSettings.dnsSettings = dnsSettings
         self.logger.log("[SDLContext] Tun started at network ip: \(netAddress.ipAddress), mask: \(netAddress.maskAddress)", level: .info)
         
         let ipv4Settings = NEIPv4Settings(addresses: [netAddress.ipAddress], subnetMasks: [netAddress.maskAddress])
@@ -483,6 +486,10 @@ public class SDLContext: @unchecked Sendable {
                 let (packets, numbers) = await self.provider.packetFlow.readPackets()
                 for (data, number) in zip(packets, numbers) where number == 2 {
                     if let packet = IPPacket(data) {
+                        let destIp = packet.header.destination_ip
+                        NSLog("destIp: \(destIp), int: \(packet.header.destination)")
+                        
+                        
                         Task.detached {
                             let dstIp = packet.header.destination
                             // 本地通讯, 目标地址是本地服务器的ip地址
diff --git a/docs.md b/docs.md
new file mode 100644
index 0000000..114447f
--- /dev/null
+++ b/docs.md
@@ -0,0 +1,12 @@
+1. 查看dns的设置
+    networksetup -getdnsservers Wi-Fi
+    scutil --dns
+
+2. 修改系统的dns设置
+    networksetup -setdnsservers Wi-Fi 8.8.8.8 1.1.1.1
+
+    恢复为自动获取
+
+    networksetup -setdnsservers Wi-Fi empty
+
+