Operating Systems can be detected using Ping Command, Ping is a computer network administration software utility, which used to find the Availability of a host on an Internet Protocol (IP) network.

Ping operates by sending Internet Control Message Protocol (ICMP) Echo Request packets to the target host and waiting for an ICMP Echo Reply.

TTL is simply meant, how long a resolver is supposed to cache the DNS query before the query expires and a new one needs to be done.

These TTL values differ between the Operating system. Here you find TTL value for Range of servers. Reference subinsb.

Device / OSVersionProtocolTTL
AIX TCP60
AIX UDP30
AIX3.2, 4.1ICMP255
BSDIBSD/OS 3.1 and 4.0ICMP255
CompaTru64 v5.0ICMP64
Cisco ICMP254
DEC PathworksV5TCP and UDP30
Foundry ICMP64
FreeBSD2.1RTCP and UDP64
FreeBSD3.4, 4.0ICMP255
FreeBSD5ICMP64
HP-UX9.0xTCP and UDP30
HP-UX10.01TCP and UDP64
HP-UX10.2ICMP255
HP-UX11ICMP255
HP-UX11TCP64
Irix5.3TCP and UDP60
Irix6.xTCP and UDP60
Irix6.5.3, 6.5.8ICMP255
juniper ICMP64
MPE/IX (HP) ICMP200
Linux2.0.x kernelICMP64
Linux2.2.14 kernelICMP255
Linux2.4 kernelICMP255
LinuxRed Hat 9ICMP and TCP64
MacOS/MacTCP2.0.xTCP and UDP60
MacOS/MacTCPX (10.5.6)ICMP/TCP/UDP64
NetBSD ICMP255
Netgear FVG318 ICMP and UDP64
OpenBSD2.6 & 2.7ICMP255
OpenVMS07.01.2002ICMP255
OS/2TCP/IP 3.0 64
OSF/1V3.2ATCP60
OSF/1V3.2AUDP30
Solaris2.5.1, 2.6, 2.7, 2.8ICMP255
Solaris2.8TCP64
StratusTCP_OSICMP255
StratusTCP_OS (14.2-)TCP and UDP30
StratusTCP_OS (14.3+)TCP and UDP64
StratusSTCPICMP/TCP/UDP60
SunOS4.1.3/4.1.4TCP and UDP60
SunOS5.7ICMP and TCP255
UltrixV4.1/V4.2ATCP60
UltrixV4.1/V4.2AUDP30
UltrixV4.2 – 4.5ICMP255
VMS/Multinet TCP and UDP64
VMS/TCPware TCP60
VMS/TCPware UDP64
VMS/Wollongong1.1.1.1TCP128
VMS/Wollongong1.1.1.1UDP30
VMS/UCX TCP and UDP128
Windowsfor WorkgroupsTCP and UDP32
Windows95TCP and UDP32
Windows98ICMP32
Windows98, 98 SEICMP128
Windows98TCP128
WindowsNT 3.51TCP and UDP32
WindowsNT 4.0TCP and UDP128
WindowsNT 4.0 SP5- 32
WindowsNT 4.0 SP6+ 128
WindowsNT 4 WRKS SP 3, SP 6aICMP128
WindowsNT 4 Server SP4ICMP128
WindowsMEICMP128
Windows2000 proICMP/TCP/UDP128
Windows2000 familyICMP128
WindowsServer 2003 128
WindowsXPICMP/TCP/UDP128
WindowsVistaICMP/TCP/UDP128
Windows7ICMP/TCP/UDP128
WindowsServer 2008ICMP/TCP/UDP128
Windows10ICMP/TCP/UDP128

Operating Systems can be detected using Ping Command

We should run the traceroute command first to determine the hops between the Target and the destination.

tracert gbhackers.com

Operating Systems can be detected using Ping Command

Total number of hops = 11

Now Ping the Domain ping gbhackers.com

Operating Systems can be detected using Ping Command

TTL value is TTL=53, By making the Sum of TTL value and number of hops we can define the operating system (53 + 11 = 64), we can conclude that there is a Linux Machine Running.

This how Operating Systems can be detected using Ping Command.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity and Hacking New updates.

4 COMMENTS

    • Thank you for your comment. Suggested method will work only if default TTL value was not Changed. Also this method fail if Datacenter routing traffic to a different subnet. Nowadays more advanced tools available for OS detection… But almost every tool will fail if Banner grabbing done in server end..

  1. common man TTL please have a basic understanding of networking please!!TTL means “time to live”. It is a value on an ICMP packet that prevents that packet from propagating back and forth between hosts ad infinitum. Each router that touches the packet decrements the TTL. If the TTL ever reaches zero, the packet is discarded. It’s also a measure of how many hops the packet took. If the TTL value started at, say, 128 and you see a value of 28, then there were 100 hops between the system where the packet originated and the final destination. My guess is that the initial TTL for the ping packets was 255, so the first ping traversal took 200 hops and the second took 9.

Leave a Reply