Possible scanner UDP issues

[rye]

In scanning a VOIP vlan, it seems like we run into inconsistency with UDP; tcpdump doesn't see any of the return traffic. Take a look.

[rye]

nmap from the host does just fine, whereas nmap from inside the scanner container seems to encounter big trouble:

Host:

$ nmap [REDACTED]

Starting Nmap [REDACTED] ( http://nmap.org ) at 2019-11-01 08:24 CDT
Nmap scan report for [REDACTED]
Host is up ([REDACTED] latency).
Not shown: 998 closed ports
PORT    STATE    SERVICE
80/tcp  open     http
443/tcp open     https

Nmap done: 1 IP address (1 host up) scanned in 4.51 seconds

Container:

$ docker-compose exec scanner /bin/bash
root@scanner:/# nmap [REDACTED]

Starting Nmap 7.40 ( https://nmap.org ) at 2019-11-01 13:25 UTC
Nmap scan report for [REDACTED]
Host is up (0.00066s latency).
Not shown: 998 closed ports
PORT    STATE    SERVICE
80/tcp  open     http
443/tcp open     https

Nmap done: 1 IP address (1 host up) scanned in 90.48 seconds

[rye]

These have been resolved since I switched to the host networking mode… in fact, it was the scanner plugins timeout so switching to host networking might not have been necessary.