1.Asynchronous socket error 10061
2.渗透神器信息收集-端口扫描masscan篇
3.使用java代码,端口端口访问某个ip地址的端口,看是验证源码验证源码否可以访问
Asynchronous socket error 10061
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procedure TForm1.Timer1Timer(Sender: TObject);
var
I : integer;
begin
Memo1.Clear;
for I := 0 to do begin
ServerSocket1.Close;
ServerSocket1.Port := I;
try
ServerSocket1.Open;
except
Memo1.Lines.Add(IntToStr(I) + ' 端å£è¢«æå¼ !');
end;
end;
end;
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å¼ã
procedure TForm1.ClientSocket1Connect(Sender: TObject;
Socket: TCustomWinSocket);
begin
Memo1.Lines.Add(' ç«¯å£ '+IntToStr(Socket.RemotePort)+' 被æå¼ï¼ ');
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
ClientSocket1.Close;
ClientSocket1.Port := PortID;
try
ClientSocket1.Open;
except
end;
Inc(PortID);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
PortID := 1;
end;
procedure TForm1.ClientSocket1Error(Sender: TObject;
Socket: TCustomWinSocket; ErrorEvent: TErrorEvent;
var ErrorCode: Integer);
begin
try
ClientSocket1.Close;
except
end;
Memo2.Lines.add(IntToStr(Socket.remotePort));
end;
åéªæ¾ä½ çæ¹æ³æè¯è¿äºå¯æ¯æ±é :asynchronous socket error
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æç»ä½ å¼æ¥ socket ç api 代ç :
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls,WInSock, ExtCtrls;
const WM_SOCKET=WM_USER+1; //socket æ¶æ¯
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Panel1: TPanel;
Memo1: TMemo;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
Sockhd : integer; //socket å¥æ
Serv_Addr : Tsockaddr;// ç®æ å°å
procedure SockEvent(var msg: Tmessage);message WM_SOCKET; // å¤ç cocket æ¶æ¯
procedure DspMsg(msg : string); // æ¾ç¤ºä¿¡æ¯
{ Private declarations }
public
{ Public declarations }
end;
Form1: TForm1;
implementation
{ $R *.DFM}
function lookup_hostname(const hostname:string):longint; // æåå转åæ IP å°å
var
RemoteHost : PHostEnt; (* no, don't free it! *)
ip_address: longint;
begin
ip_address:=-1;
try
if hostname='' then
begin (* no host given! *)
lookup_hostname:=ip_address;
EXIT;
end
else
begin
ip_address:=Winsock.Inet_Addr(PChar(hostname)); (* try a xxx.xxx.xxx.xx first *)
if ip_address=SOCKET_ERROR then begin
RemoteHost:=Winsock.GetHostByName(PChar(hostname));
if (RemoteHost=NIL) or (RemoteHost^.h_length<=0) then
begin
lookup_hostname:=ip_address;
EXIT; (* host not found *)
end
else
ip_address:=longint(pointer(RemoteHost^.h_addr_list^)^);
end;
end;
except
ip_address:=-1;
end;
lookup_hostname:=ip_address;
end;
procedure TFOrm1.DspMsg(msg: string);
begin
memo1.Lines.Add(msg+'...');
if Memo1.Lines.Count> then Memo1.Lines.Delete(0);
end;
procedure TForm1.SockEvent(var msg : tmessage); // å¤ç socket æ¶æ¯
begin
case msg.LParam of
FD_READ: begin // æ è¯å¯ä»¥è¯»æ°æ® ,å½ç¶è¯å®å·²ç»é¾æ¥ä¸äº
dspmsg(' å¯ä»¥è¯»åæ°æ® ');
//do what you want do
end;
FD_WRITE: begin
dspmsg(' å¯ä»¥åéæ°æ® ');
//do what you want do
end;
FD_ERROR: begin
dspmsg(' åçé误 ');
// å¦æä½ æ¯å®¢æ·ç«¯ ,ååºè¯¥æ¯è¿æ¥ä¸ä¸ ,å³ç«¯å£æ²¡æå¼
end;
FD_CLOSE: Begin
dspmsg(' æå¡å¨æå¼è¿æ¥ ');
// 对æ¹å ³éè¿æ¥
end;
FD_CONNECT: begin
dspmsg(' è¿ç»ä¸æå¡å¨ ');
// 表示对æ¹ç«¯å£å¼æ¾
end;
FD_ACCEPT: begin
dspmsg(' æ¥æ¶ä¸ä¸ªè¯·æ± ');
// è¿ä¸ªæ¶æ¯åªææå¡ç«¯å¯è½åºç°
end;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
var wsaData:TwsaData;
begin // å¯å¨ winsock å¨æé¾æ¥åº
if WSAStartup (makeword(2,2), wsaData)<>0 then begin
messagebox(application.handle,' æ æ³å¯å¨ winsock å¨æè¿æ¥åº !',' è¦å ',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
Application.Terminate;
end;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin // å ³é dll
WSACleanup;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Sockhd := socket(AF_INET,SOCK_STREAM,0); // å建 socket å¥æ
if Sockhd<0 then begin
messagebox(application.handle,' æ æ³å建å¥æ !',' è¦å ',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
exit;
end;
Serv_addr.sin_addr.s_addr:= lookup_hostname(edit1.Text); // 主æºå
Serv_addr.sin_family := PF_INET;
Serv_addr.sin_port := htons(); //any port you want to connect
if WSAAsyncSelect(Sockhd,Form1.handle,WM_SOCKET,FD_ACCEPT or FD_CONNECT or FD_CLOSE or FD_READ or FD_WRITE)=SOCKET_ERROR
then begin
messagebox(application.handle,' æ æ³å建å¥æ !',' è¦å ',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
exit;
end; // å¼æ¥ socket
connect(sockhd,serv_addr,sizeof(serv_addr)); // è¿æ¥ ,ç»æä¼å¨åé¢çå¤çå½æ°å¤ç
end;
end.
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WinSock Error Codes
The following error codes apply to the WinSock ActiveX Controls.
Error Code Error Message
The operation is canceled.
The requested address is a broadcast address, but flag is not set.
Invalid argument.
Socket not bound, invalid address or listen is not invoked prior to accept.
No more file descriptors are available, accept queue is empty.
Socket is non-blocking and the specified operation will block.
A blocking Winsock operation is in progress.
The operation is completed. No blocking operation is in progress.
The descriptor is not a socket.
Destination address is required.
The datagram is too large to fit into the buffer and is truncated.
The specified port is the wrong type for this socket.
Option unknown, or unsupported.
The specified port is not supported.
Socket type not supported in this address family.
Socket is not a type that supports connection oriented service.
Address Family is not supported.
Address in use.
Address is not available from the local machine.
Network subsystem failed.
The network cannot be reached from this host at this time.
Connection has timed out when SO_KEEPALIVE is set.
Connection is aborted due to timeout or other failure.
The connection is reset by remote side.
No buffer space is available.
Socket is already connected.
Socket is not connected.
Socket has been shut down.
The attempt to connect timed out.
Connection is forcefully rejected.
Socket already created for this object.
Socket has not been created for this object.
Authoritative answer: Host not found.
Non-Authoritative answer: Host not found.
Non-recoverable errors.
Valid name, no data record of requested type.
ææ³åªè¦å¯¹å®è¿è¡æå ³æä½å°±è½å®å ¨å±è½ winsocket é误æ¶æ¯ ( è³å°
è½å±è½å¾å¤ onerror éç errorcode åæ°æ æ³å±è½çæ¶æ¯ )
æç»äºæ¾å°åå æå¨äº
å¨æå¼ Socket æ¶ä¹è¦æè·å¼å¸¸
try
ClientSocket.Open;
except
MessageBox(MainForm.Handle,'Error connecting to this address','Connect',MB_ICONEXCLAMATION);
end;
å¨ OnError ä¸æåè¦å° ErrorCode 置为 0
if ErrorEvent=eeConnect then
begin
Socket.Close;
MessageBox(MainForm.Handle,'Error connecting to this address','Connect',MB_ICONEXCLAMATION);
end
else if ErrorEvent=eeSend then
Socket.Close;
ErrorCode:=0;
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渗透神器信息收集-端口扫描masscan篇
本篇介绍的是互联网大规模端口扫描工具Masscan的使用方法。如果你对扫描原理不感兴趣,端口端口可以直接跳至文章结尾的验证源码验证源码蓝牙键鼠源码彩蛋部分。
在搭建环境时,端口端口可以从官方GitHub或百度网盘获取源代码或Windows版本,验证源码验证源码以CentOS 7为例,端口端口可下载源码编译。验证源码验证源码
使用Masscan时,端口端口你可以执行如下命令来检测指定端口的验证源码验证源码开放情况:
示例命令如下:`discovered open port /tcp on ...`,表示发现了...的端口端口微赞live源码端口是开放的。
在进行端口扫描时,验证源码验证源码可以使用率参数(rate)来调整扫描速度,端口端口但需注意,验证源码验证源码过高可能导致漏报,端口端口建议根据自身带宽进行合理设置。一些源码
为了获取目标服务器的banner信息,需要在TCP连接时设置固定源端口,避免因防火墙策略导致的数据包被丢弃。
实际渗透中,WAF、仿在线培训源码IPS和IDS等安全设备能通过指纹识别扫描器,例如,通过查看Apache2日志可发现使用了Masscan。但通过修改User-Agent信息,可绕过此类检测。测算小程序源码
当遇到服务器禁止ping响应数据包时,可使用`-Pn`参数取消探测前的ping动作,直接进行扫描。
对于大规模目标,可以将IP或IP段存入txt文件中,使用`-iL`参数同时扫描多个目标。
关于扫描结果的保存,Masscan提供TEXT、JSON和XML三种方式。对于个人应用,TEXT格式通常足够使用。
以上是Masscan的基本使用方法。关注我们,获取更多网络安全知识,无优质不分享。
彩蛋:无需深入理解原理,直接套用以下命令公式进行扫描操作。
使用java代码,访问某个ip地址的端口,看是否可以访问
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.Socket;
public class Client {
public static void main(String[] args) throws Exception {
Socket clientSocket = new Socket(".0.0.1", );
clientSocket.close();
}
}
没有异常就是可以连接了。