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Nmap For Mac Os X Yosemite 10 10 5
If you have nmap installed on your own computer (e.g. with 'fink install nmap'), you can easily test your own computer using localhost as the target:
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> sudo nmap -O localhost
Password:
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on localhost (127.0.0.1):
(The 1570 ports scanned but not shown below are in state: closed)
Port State Service
1/tcp open tcpmux
11/tcp open systat
15/tcp open netstat
22/tcp open ssh
25/tcp open smtp
79/tcp open finger
111/tcp open sunrpc
119/tcp open nntp
143/tcp open imap2
427/tcp open svrloc
540/tcp open uucp
548/tcp open afpovertcp
587/tcp open submission
631/tcp open ipp
635/tcp open unknown
993/tcp open imaps
1033/tcp open netinfo
1080/tcp open socks
1524/tcp open ingreslock
2000/tcp open callbook
6000/tcp open X11
6667/tcp open irc
12345/tcp open NetBus
12346/tcp open NetBus
27665/tcp open Trinoo_Master
31337/tcp open Elite
32771/tcp open sometimes-rpc5
32772/tcp open sometimes-rpc7
32773/tcp open sometimes-rpc9
32774/tcp open sometimes-rpc11
54320/tcp open bo2k
Remote OS guesses: FreeBSD 4.4-5 or Mac OS X 10.0.4 (Darwin V. 1.3-1.3.7 or 4P13), FreeBSD 4.4 for i386 (IA-32)
Nmap run completed -- 1 IP address (1 host up) scanned in 31 seconds
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Not exactly correct (I'm running Mac OS X 10.2.4) but not too far off.
I tried setting both of the blackhole settings as suggested but it did not seem to make any difference. I used nmap 3.0 on a fully patched RedHat Linux 8.0 and it still identified my Mac OS 10.2.5 as 'Mac OS X 10.1 - 10.1.4'. Now I know the version is not quite correct but it still provided the correct OS.
I've found that if you do this, it bypasses your firewall. By default, it's set up to allow loopback connections, which is what you're doing when you use 127.0.0.1 - and if I do this, all my ports show up.If, however, I get my external ip and try scanning that, I don't get anything - not even the ICMP ping gets through.
Also, Snort tells me someone's trying to portscan me :) (as well as complaining that there are packets going out with the same source and destination)
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=)
1. Check the macbox
macbox bash$ sysctl net.inet.tcp.blackhole
net.inet.tcp.blackhole: 0
macbox bash$ sysctl net.inet.udp.blackhole
net.inet.udp.blackhole: 0
2. Run nmap on sunbox - note the test results at the end
sunbox ksh$ nmap -sS -O 10.128.12.105
Starting nmap V. 2.3BETA14 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Interesting ports on macbox (10.128.12.105):
(Ports scanned but not shown below are in state: filtered)
Port State Protocol Service
22 open tcp ssh
80 open tcp http
427 unfiltered tcp svrloc
TCP Sequence Prediction: Class=truly random
Difficulty=9999999 (Good luck!)
No OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
TSeq(Class=TR)
T1(Resp=Y%DF=Y%W=807A%ACK=S++%Flags=AS%Ops=MNWNNT)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=807A%ACK=S++%Flags=AS%Ops=MNWNNT)
T4(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=Y%DF=N%W=0%ACK=S++%Flags=AR%Ops=)
T6(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T7(Resp=Y%DF=N%W=0%ACK=S%Flags=AR%Ops=)
PU(Resp=Y%DF=Y%TOS=0%IPLEN=38%RIPTL=148%RIPCK=E%UCK=0%ULEN=134%DAT=E)
Nmap run completed -- 1 IP address (1 host up) scanned in 195 seconds
3. Fiddle macbox
macbox bash$ sudo sysctl -w net.inet.tcp.blackhole=2
net.inet.tcp.blackhole: 0 -> 2
macbox bash$ sudo sysctl -w net.inet.udp.blackhole=1
net.inet.udp.blackhole: 0 -> 1
4. Run nmap again - note different test results
sunbox ksh$ nmap -sS -O 10.128.12.105
Starting nmap V. 2.3BETA14 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Interesting ports on macbox (10.128.12.105):
(Ports scanned but not shown below are in state: filtered)
Port State Protocol Service
22 open tcp ssh
80 open tcp http
TCP Sequence Prediction: Class=truly random
Difficulty=9999999 (Good luck!)
No OS matches for host (If you know what OS is running on it, see http://www.insecure.org/cgi-bin/nmap-submit.cgi).
TCP/IP fingerprint:
TSeq(Class=TR)
T1(Resp=Y%DF=Y%W=807A%ACK=S++%Flags=AS%Ops=MNWNNT)
T2(Resp=N)
T3(Resp=Y%DF=Y%W=807A%ACK=S++%Flags=AS%Ops=MNWNNT)
T4(Resp=Y%DF=N%W=0%ACK=O%Flags=R%Ops=)
T5(Resp=N)
T6(Resp=N)
T7(Resp=N)
PU(Resp=N)
Nmap run completed -- 1 IP address (1 host up) scanned in 200 seconds
One should also be wary when giving bad information out.
By setting tcp blackhole to '1' you do not 'break' anything, nor do you risk 'breaking the stack'.
There are no 'cons' to setting tcp blackhole to 1, other than servers trying to scan you will time out rather than sit and nail you port after port.
Being a networking expert and a BSD operator for almost a decade now, I support this; infact I've done so on most every BSD box I admin, OSX and otherwise (Free/Net/Open).
I must say, however, that the better way to approach this is with a tight ipfw configuration front-ended by a decent nat box that's locked down. Blackhole in and of itself is not a hardener of security; but it does make things a little more vague/obscure.
Use ipfw. And read the reply to the first 'dont do it' post above.
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Anyway to do this on a Slackware Linux box (I use it for my Mac LAN) without patching the kernel?
This hint was verified to work on MacOSX Tiger 10.4.6 scanned with nmap 3.93: If you have only one port open and one port closed NMap outputs:
That still leaves a big deal of guesswork for the scanner.
Nmap For Mac Os X Yosemite 10 10 5
If you also run in stealth-mode without any open port (nothing in the Sharing PreferencePanel, then nmap cannot tell anything about your Mac.
Winrar on mac. You can also just open rar files and explore the archive without uncompressing it. After it has been run, it will now be associated with the rar archive on your Mac, so you can simply double-click on the rar file to extract it in the future. By installing the software, all of the rar files are automatically connected with the UnRarX. Therefore, there are others information about this program. UnRarX How to Use UnRarXFirst of all, you must download UnRarX first, then install it.