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Thread: specifying more than one character on nmap --ip-options

  1. #1
    Junior Member
    Join Date
    Jan 2019
    Posts
    6

    specifying more than one character on nmap --ip-options

    hi
    I have "(22 - 'Invalid argument')" using nmap.
    I'V google'd and got https://seclists.org/nmap-dev/
    but on that is it talks about IPv6 while I got this error using
    IPv4 in no place IPv4 is mensionned, so why am I getting
    this weird error ???????????

    i entered

    nmap --send-eth --release-memory --nsock-engine=epoll --allports --fuzzy --randomize-hosts --log-errors --max-os-tries=9 -n --reason --append-output --scanflags=URGACKPSHRSTSYNFIN --max-retries=6 --host-timeout=225s --stats-every=10m --ttl=255 --min-hostgroup=5 --max-hostgroup=25 --max-rtt-timeout=60s --scan-delay=250ms --max-scan-delay=25s --stats-every=1 -v5 -sT -sV -A -p 80-82 0.18.0.0

    and got
    Starting Nmap 7.70 ( https://nmap.org ) at 2019-01-17 16:05 CET
    NSE: Loaded 148 scripts for scanning.
    NSE: Script Pre-scanning.
    NSE: Starting runlevel 1 (of 2) scan.
    Initiating NSE at 16:05
    Completed NSE at 16:05, 0.00s elapsed
    NSE: Starting runlevel 2 (of 2) scan.
    Initiating NSE at 16:05
    Completed NSE at 16:05, 0.00s elapsed
    Initiating Ping Scan at 16:05
    Scanning 0.18.0.0 [2 ports]
    Stats: 0:00:01 elapsed; 0 hosts completed (0 up), 1 undergoing Ping Scan
    Ping Scan Timing: About 0.00% done
    Strange read error from 0.18.0.0 (22 - 'Invalid argument')
    Strange read error from 0.18.0.0 (22 - 'Invalid argument')
    Completed Ping Scan at 16:05, 0.50s elapsed (1 total hosts)
    NSE: Script Post-scanning.
    NSE: Starting runlevel 1 (of 2) scan.
    Initiating NSE at 16:05
    Completed NSE at 16:05, 0.00s elapsed
    NSE: Starting runlevel 2 (of 2) scan.
    Initiating NSE at 16:05
    Completed NSE at 16:05, 0.00s elapsed
    Read data files from: /usr/bin/../share/nmap
    Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
    Nmap done: 1 IP address (0 hosts up) scanned in 1.46 seconds

    when trying with less arguements nmap -p 80-82 0.18.0.0
    got:
    Starting Nmap 7.70 ( https://nmap.org ) at 2019-01-17 16:24 CET
    Strange read error from 0.18.0.0 (22 - 'Invalid argument')
    Strange read error from 0.18.0.0 (22 - 'Invalid argument')
    Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn
    Nmap done: 1 IP address (0 hosts up) scanned in 0.12 seconds

    when trying with ncat i got

    marc@platinum:~/NCat_test$ nc -vvv 0.18.0.0 80
    0.18.0.0: inverse host lookup failed: Unknown host
    (UNKNOWN) [0.18.0.0] 80 (http) : Invalid argument
    sent 0, rcvd 0

    marc@platinum:~/NCat_test$ nc -vvv 0.18.0.0 81
    0.18.0.0: inverse host lookup failed: Unknown host
    (UNKNOWN) [0.18.0.0] 81 (hosts2-ns) : Invalid argument
    sent 0, rcvd 0

    i still have "Invalid argument" but this time instead of 22 I got the post numbers and service
    80 (http)
    81 (hosts2-ns)

    this raises a few questions
    1) does the "Invalid argument" of ncat and nmap relate to the same thing ?
    2) how can I make nmap for informative instead of printing 22 ?
    3) how can I say that the remote port is really CLOSEd or is it really OPENned and rejecting because of the firewall ?



    thank's for your help

  2. #2
    Junior Member
    Join Date
    May 2004
    Posts
    12
    In looking at the output provided, it appears you are running nmap as a user and not as root or a privileged user, which is a requirement in order to take full advantage of its capabilities.

    I recommend typing "sudo su" and press Enter, then retype your password to become superuser.

    Next, run nmap, e.g. "nmap -p 80-82 0.18.0.0" replacing the 0.18.0.0 with a legitimate IP address to see how you fare.

    I suspect you'll have better success or at least, you're a step closer.

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