使用Python测试Ping主机IP和某端口是否开放的实例

Python  /  管理员 发布于 7年前   214

使用Python方法

比用各种命令方便，可以设置超时时间，到底通不通，端口是否开放一眼能看出来。

命令和返回

完整权限，可以ping通，端口开放，结果如下：

无root权限（省略了ping），端口开放，结果如下：

完整权限，可以ping通，远端端口关闭，结果如下：

完整权限，可以ping通，本地端口关闭，结果如下：

完整权限，不能ping通（端口自然也无法访问），结果如下：

pnp.py代码

#!/usr/bin/python#name pnp.py#ping and port#coding:utf-8import os, sys, socket, struct, select, timeICMP_ECHO_REQUEST = 8 # Seems to be the same on Solaris.socket.setdefaulttimeout(4)#first argumenthost=sys.argv[1]#second argumentport=int(sys.argv[2])#socket try connectdef PortOpen(ip,port): print( '\033[1m*Port\033[0m %s:%d' %(ip,port)), s=socket.socket(socket.AF_INET,socket.SOCK_STREAM) try:  s.connect((ip,port))  s.shutdown(2)  print( '\033[1;32m.... is OK.\033[0m' )   return True except socket.timeout:  print( '\033[1;33m.... is down or network time out!!!\033[0m' )   return False   except:  print( '\033[1;31m.... is down!!!\033[0m' )   return Falsedef checksum(source_string): """ I'm not too confident that this is right but testing seems to suggest that it gives the same answers as in_cksum in ping.c """ sum = 0 countTo = (len(source_string)/2)*2 count = 0 while count<countTo: thisVal = ord(source_string[count + 1])*256 + ord(source_string[count]) sum = sum + thisVal sum = sum & 0xffffffff # Necessary? count = count + 2 if countTo<len(source_string): sum = sum + ord(source_string[len(source_string) - 1]) sum = sum & 0xffffffff # Necessary? sum = (sum >> 16) + (sum & 0xffff) sum = sum + (sum >> 16) answer = ~sum answer = answer & 0xffff # Swap bytes. Bugger me if I know why. answer = answer >> 8 | (answer << 8 & 0xff00) return answerdef receive_one_ping(my_socket, ID, timeout): """ receive the ping from the socket. """ timeLeft = timeout while True: startedSelect = time.time() whatReady = select.select([my_socket], [], [], timeLeft) howLongInSelect = (time.time() - startedSelect) if whatReady[0] == []: # Timeout  return timeReceived = time.time() recPacket, addr = my_socket.recvfrom(1024) icmpHeader = recPacket[20:28] type, code, checksum, packetID, sequence = struct.unpack(  "bbHHh", icmpHeader ) if packetID == ID:  bytesInDouble = struct.calcsize("d")  timeSent = struct.unpack("d", recPacket[28:28 + bytesInDouble])[0]  return timeReceived - timeSent timeLeft = timeLeft - howLongInSelect if timeLeft <= 0:  returndef send_one_ping(my_socket, dest_addr, ID): """ Send one ping to the given >dest_addr<. """ dest_addr = socket.gethostbyname(dest_addr) # Header is type (8), code (8), checksum (16), id (16), sequence (16) my_checksum = 0 # Make a dummy heder with a 0 checksum. header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, ID, 1)  #a1 = struct.unpack("bbHHh",header) #my test bytesInDouble = struct.calcsize("d") data = (192 - bytesInDouble) * "Q" data = struct.pack("d", time.time()) + data # Calculate the checksum on the data and the dummy header. my_checksum = checksum(header + data) # Now that we have the right checksum, we put that in. It's just easier # to make up a new header than to stuff it into the dummy. header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, socket.htons(my_checksum), ID, 1) packet = header + data my_socket.sendto(packet, (dest_addr, 1)) # Don't know about the 1def do_one(dest_addr, timeout): """ Returns either the delay (in seconds) or none on timeout. """ delay=None icmp = socket.getprotobyname("icmp") try: my_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp) my_ID = os.getpid() & 0xFFFF send_one_ping(my_socket, dest_addr, my_ID) delay = receive_one_ping(my_socket, my_ID, timeout) my_socket.close() except socket.error, (errno, msg): if errno == 1:  # Operation not permitted  msg = msg + (  " - not root."  )  raise socket.error(msg) #raise # raise the original error return delaydef verbose_ping(dest_addr, timeout = 2, count = 100): """ Send >count< ping to >dest_addr< with the given >timeout< and display the result. """ for i in xrange(count): print "\033[1m*Ping\033[0m %s ..." % dest_addr, try:  delay = do_one(dest_addr, timeout) except socket.error, e:  print "\033[1;31m... failed. (%s)" % e  break if delay == None:  print "\033[1;31m... failed. (timeout within %ssec.)\033[0m" % timeout else:  delay = delay * 1000  print "\033[1;32m... get ping in %0.4fms\033[0m" % delayif __name__ == '__main__': if os.geteuid() == 0: verbose_ping(host,2,3) else: print "\033[1m*Ping\033[0m test must be sudo or root..." PortOpen(host,port) print( 'Job finished.')

使用命令方法

使用命令ping就不说了，端口可以用下面的命令。

当时目前telnet基本不用，可能没有telnet客户端了。

测试通常连接不上会等很久，端口连上了也需要通过反馈内容自行判断。

telnet

telnet ip port

$telnet 192.168.234.1Trying 192.168.234.1...Connected to 192.168.234.1.Escape character is '^]'.......

wget

wget ip:port

$wget 192.168.234.1:21--2019-03-22 15:42:27-- http://192.168.234.1:21/正在连接 192.168.234.1:21... 已连接。已发出 HTTP 请求，正在等待回应... 200 没有 HTTP 头，尝试 HTTP/0.9长度：未指定正在保存至: “index.html”......

SSH

ssh -v ip -p port

$ssh -v 192.168.234.1 -p 21OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017debug1: Reading configuration data /etc/ssh/ssh_configdebug1: /etc/ssh/ssh_config line 58: Applying options for *debug1: Connecting to 192.168.234.1 [192.168.234.1] port 21.debug1: Connection established.......

curl

culr ip:port

$curl 192.168.234.1:21220 Serv-U FTP Server v15.1 ready...530 Not logged in.......

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