justintimperio / gomap Goto Github PK

Additionally, for my solution to #11 I expanded the "slow" scan (i.e. fastscan==false) option so it scans all 65536 ports. This does take longer (6.5 minutes in my case) but that is still short enough to be useful. So maybe there are three options instead of two:
fastscan: 72 common ports
mediumscan: 3000+ less common ports
fullcan: all 65536 possible ports

I've created a local version that modifies func (results *IPScanResult) String() string so that it sorts the result table by port number.

I find this handy for scanning a large list of open ports.

I can supply a PR if you like.

I don't know why gomap stealth scan need root privilege, my WSL ubuntu root can't find go command, should I reinstall go?

Just a cursory look at the implementation of the code, I reckon the UDP port scan would not work just because of how UDP protocol works. If the the code dials the target with UDP protocol e.g. conn, err = net.Dial("udp", raddr), there will not be any error message from the target server just because UDP is connectionless. A server will only reply when a "meaningful" packet is sent to the UDP port on the target. For more info - https://serverfault.com/a/416269

By the current way of checking for open/close UDP port i.e. presence of error dialing the target, all UDP ports would be open. Which defeats the purpose of a port scan.

Alternatively, can refer to how nmap implements its UDP probe - https://nmap.org/book/scan-methods-udp-scan.html

is it possible to support proxy dialer instead? for HTTP and SOCKS5

Brother, can this support multithreading

In my local copy I've made modifications so that the portResult distinguishes between these three cases:
Connect OK - LISTEN process on the other end made a connection
Timeout - Firewall blocked connection
Connection Refused - Firewall did not block connection, but no LISTENing process on the other end. Thus this port could be used for a new server process

I find this handy because I don't want to have to open new ports in the firewall, and so I need to see what ports are open without having to run a listening process on all ports.