Setting X Fires #128 Mac OS
TTL (Time To Live) is a timer value included in packets sent over networks that tells the recipient how long to hold or use the packet before discarding and expiring the data (packet). TTL values are different for different Operating Systems. So, you can determine the OS based on the TTL value. You can get the TTL value by pinging an address. Here is the output got by pinging 'subinsb.com' on my system :
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Mac Os Settings Icon
As you can see from the output, you got the TTL value. Since this website is hosted on a Red Hat system, it returned 57 which is close to 64 (TTL default value of Linux system). So, from this we can understand the OS of the remote system. Here are the default TTL values of different devices / Operating Systems :
| Device / OS | 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 |
| Windows | Vista | ICMP/TCP/UDP | 128 |
| Windows | 7 | ICMP/TCP/UDP | 128 |
| Windows | Server 2008 | ICMP/TCP/UDP | 128 |
| Windows | 10 | ICMP/TCP/UDP | 128 |
Virtualbox Mac Os Settings
VMware's knowledge base article, Setting Custom Video Memory Size in Fusion, shows the setting to change: Setting Custom Video Memory Size in Fusion. There is no way to choose a different video memory size through the user interface. It must be done by editing the virtual machine settings.
I will update this table in the future when there’s a release of new important OS whenever I get the time. You can get the short version of default TTL values by this table :
| Device / OS | TTL |
| *nix (Linux/Unix) | 64 |
| Windows | 128 |
| Solaris/AIX | 254 |
You can find it yourself by pinging localhost as mentioned by :
SDLMESS 0.132, MESS for Mac OS X on the PowerPC and Intel processors (10.4 and later)
SDLMESS 0.131, MESS for Mac OS X on the PowerPC and Intel processors (10.4 and later)
SDLMESS 0.130, MESS for Mac OS X on the PowerPC and Intel processors (10.4 and later)
SDLMESS 0.129, MESS for Mac OS X on the PowerPC and Intel processors
SDLMESS 0.128, MESS for Mac OS X on the PowerPC and Intel processors
SDLMESS 0.127, MESS for Mac OS X on the PowerPC and Intel processors
SDLMESS 0.126, Mac OS X on the PowerPC processor
SDLMESS 0.125, Mac OS X on the PowerPC processor
SDLMESS 0.125, Mac OS X on the Intel processor
SDLMESS 0.124, Mac OS X on the PowerPC processor
SDLMESS 0.124, Mac OS X on the Intel processor
SDLMESS 0.123, Mac OS X on the PowerPC processor
SDLMESS 0.123, Mac OS X on the x86 processor
SDLMESS 0.122, Mac OS X on the PowerPC processor
SDLMESS 0.122, Mac OS X on the Intel processor
SDLMESS 0.121, Mac OS X on the PowerPC G4 processor
SDLMESS 0.121, Mac OS X on the PowerPC G5 processor
SDLMESS 0.121, Mac OS X on an Intel processor
SDLMESS 0.120, Mac OS X on the PowerPC G3 processor
SDLMESS 0.120, Mac OS X on the PowerPC G4 processor
SDLMESS 0.119, Mac OS X on the PowerPC G3 processor
SDLMESS 0.119, Mac OS X on the PowerPC G4 processor
SDLMESS 0.119, Mac OS X on the PowerPC G5 processor
SDLMESS 0.118, Mac OS X on the PowerPC G4 processor
SDLMESS 0.118, Mac OS X on the PowerPC G5 processor
SDLMESS 0.115, Mac OS X on the PowerPC G4 processor
SDLMESS 0.115, Mac OS X on the PowerPC G5 processor
SDLMESS 0.114, Mac OS X on the PowerPC G3 processor
SDLMESS 0.114, Mac OS X on the PowerPC G4 processor
SDLMESS 0.114, Mac OS X on the PowerPC G5 processor
SDLMESS 0.114, Mac OS X on the Intel processor
SDLMESS 0.111, Mac OS X on the PowerPC G3 processor
SDLMESS 0.111, Mac OS X on the PowerPC G4 processor
SDLMESS 0.111, Mac OS X on the PowerPC G5 processor
SDLMESS 0.111, Mac OS X on the Intel processor
SDLMESS 0.110, Mac OS X on the PowerPC G4 processor
SDLMESS 0.110, Mac OS X on the PowerPC G5 processor
SDLMESS 0.110, Mac OS X on the Intel processor
SDLMESS 0.109, Mac OS X on the PowerPC G3 processor
SDLMESS 0.109, Mac OS X on the PowerPC G4 processor
SDLMESS 0.109, Mac OS X on the PowerPC G5 processor
SDLMESS 0.109, Mac OS X on the Intel processor
SDLMESS 0.108, Mac OS X on the PowerPC G3 processor
SDLMESS 0.108, Mac OS X on the PowerPC G4 processor
SDLMESS 0.108, Mac OS X on the PowerPC G5 processor
SDLMESS 0.108, Mac OS X on the Intel processor