[ICMP / Ping ] ttl 값을 통해 운영체제 확인

TTL is a timer value included in packets sent over TCP/IP-based networks that tells the recipients how long to hold or use the packet or any of its included data before expiring and discarding the packet or data.

Folloing are the list of Devices / Operating system with Default TTL values

타임 투 리브(Time to live, TTL)는 컴퓨터나 네트워크에서 데이터가 유효한 기간을 나타내기 위한 방법이기도 하지만 TTL 값을 통하여 상대 장비의 운영체제(OS)를 구별 가능 하게 됩니다.

Linux = 64

Windows = 128

Cisco = 256

기본적으로 ICMP 의 Ping의 TTL 값은 홉 카운트(Hop Count) 값을 보여 주기 때문에

만약 43이라는 TTL 값이 나오게 된다면 tracert 명령어를 통해 경로추적을 하여 나온 값을 계산하신다면

대략적인 상대 IP 주소를 가진 장비의 OS를 구별할 수 있게됩니다.

 

 

 

 

 

 

 

 

OS/Device	Version	Protocol	TTL
AIX		TCP	60
AIX		UDP	30
AIX	3.2, 4.1	ICMP	255
BSDI	BSD/OS 3.1 and 4.0	ICMP	255
Compa	Tru64 v5.0	ICMP	64
Cisco		ICMP	254
DEC Pathworks	V5	TCP and UDP	30
Foundry		ICMP	64
FreeBSD	2.1R	TCP and UDP	64
FreeBSD	3.4, 4.0	ICMP	255
FreeBSD	5	ICMP	64
HP-UX	9.0x	TCP and UDP	30
HP-UX	10.01	TCP and UDP	64
HP-UX	10.2	ICMP	255
HP-UX	11	ICMP	255
HP-UX	11	TCP	64
Irix	5.3	TCP and UDP	60
Irix	6.x	TCP and UDP	60
Irix	6.5.3, 6.5.8	ICMP	255
juniper		ICMP	64
MPE/IX (HP)		ICMP	200
Linux	2.0.x kernel	ICMP	64
Linux	2.2.14 kernel	ICMP	255
Linux	2.4 kernel	ICMP	255
Linux	Red Hat 9	ICMP and TCP	64
MacOS/MacTCP	2.0.x	TCP and UDP	60
MacOS/MacTCP	X (10.5.6)	ICMP/TCP/UDP	64
NetBSD		ICMP	255
Netgear FVG318		ICMP and UDP	64
OpenBSD	2.6 & 2.7	ICMP	255
OpenVMS	07.01.2002	ICMP	255
OS/2	TCP/IP 3.0		64
OSF/1	V3.2A	TCP	60
OSF/1	V3.2A	UDP	30
Solaris	2.5.1, 2.6, 2.7, 2.8	ICMP	255
Solaris	2.8	TCP	64
Stratus	TCP_OS	ICMP	255
Stratus	TCP_OS (14.2-)	TCP and UDP	30
Stratus	TCP_OS (14.3+)	TCP and UDP	64
Stratus	STCP	ICMP/TCP/UDP	60
SunOS	4.1.3/4.1.4	TCP and UDP	60
SunOS	5.7	ICMP and TCP	255
Ultrix	V4.1/V4.2A	TCP	60
Ultrix	V4.1/V4.2A	UDP	30
Ultrix	V4.2 – 4.5	ICMP	255
VMS/Multinet		TCP and UDP	64
VMS/TCPware		TCP	60
VMS/TCPware		UDP	64
VMS/Wollongong	1.1.1.1	TCP	128
VMS/Wollongong	1.1.1.1	UDP	30
VMS/UCX		TCP and UDP	128
Windows	for Workgroups	TCP and UDP	32
Windows	95	TCP and UDP	32
Windows	98	ICMP	32
Windows	98, 98 SE	ICMP	128
Windows	98	TCP	128
Windows	NT 3.51	TCP and UDP	32
Windows	NT 4.0	TCP and UDP	128
Windows	NT 4.0 SP5-		32
Windows	NT 4.0 SP6+		128
Windows	NT 4 WRKS SP 3, SP 6a	ICMP	128
Windows	NT 4 Server SP4	ICMP	128
Windows	ME	ICMP	128
Windows	2000 pro	ICMP/TCP/UDP	128
Windows	2000 family	ICMP	128
Windows	Server 2003		128
Windows	XP	ICMP/TCP/UDP	128

출처 : http://www.binbert.com/blog/2009/12/default-time-to-live-ttl-values/