cmap

README

cmap

cmap is a poor-mans version of nmap. It utilizes nmap under the hood.

I'm just really fucking lazy learning the proper nmap syntax. Nost of the time, I just wanna know which hosts are up, and if port 22 is open for SSH. So yeah, call me stupid, but I actually use this tool almost on a daily base. Sorry to all the nmap fans who feel offended by this creation of mine. But hey - at least it uses nmap under the hood, right? ;)

Usage

$ cmap scan network 192.168.0.0/24 -p 6443
Starting scan of network [192.168.0.0/24] with Timeout 15m0s
  NAME (5)              IP              SSH        OTHER PORTS                    ERROR
 --------------------- --------------- ---------- ------------------------------ -------
  router                192.168.0.1     filtered   sun-sr-https/6443/tcp=closed
  ava                   192.168.0.140   closed     sun-sr-https/6443/tcp=closed
  clusterpi-master      192.168.0.156   open       sun-sr-https/6443/tcp=open
  clusterpi-worker-1    192.168.0.111   open       sun-sr-https/6443/tcp=closed
  clusterpi-worker-2    192.168.0.103   open       sun-sr-https/6443/tcp=closed

Pull requests

I warmly welcome pull requests. Feel free to contribute whatever you feel like (if you feel like it at all 😂 it's a kinda stupid tool anyway)

Multi-Threading

It should be rather called "multi-go-routines". I utilize go-routines with a thread-pool design approach, so you can easily tailor the amount of threads used using the --paralell flag. By default I spawn 10 go routines.

I don't actually multi-thread the network discovery, but only the host-detection part. That means, if you wanna scan a /12 network, it first calls nmap -sn cidr/12 under the hood, which will take forever (or at least it will feel like it's taking forever). However, now that you got a couple hundred (or - imagine - a couple thousand) hosts reported as "online", the thread-pool is used to scan for open ports in paralell. Each thread is scanning one host at a time, using nmap ipaddr -p 22.