syscan-example-book.py

syscan-example-book.py

from scapy.all import *
import ipaddress

ports = [25,80,53,443,445,8080,8443]

def SynScan(host):
    ans, uans = sr(
        IP(dst=host)/
        TCP(sport=65535,dport=ports,flags="S"),
        timeout=2, verbose=0)
    
    print("Open ports at %s:" % host)

    for (s,r,) in ans:
        if s[TCP].dport == r[TCP].sport and r[TCP].flags=="SA":
            print(s[TCP].dport)

def DNSScan(host):
    ans,unans = sr(
        IP(dst=host)/
        UDP(dport=53)/
        DNS(rd=1,qd=DNSQR(qname="google.com"))
        ,timeout=2,verbose=0)
    
    if ans and ans[UDP]:
        print("DNS Server at %s"%host)

host = input("Enter IP Address: ")

try:
    ipaddress.ip_address(host)
except:
    print("Invalid address")
    exit(-1)

SynScan(host)
DNSScan(host)