Created
February 22, 2019 19:56
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Option 121 for DHCP static routes pfsense
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| Default gateway = 192.168.0.1 | |
| Route network 192.168.0.0/24 -> 192.168.0.1 | |
| Route network 192.168.1.0/24 -> 192.168.0.250 | |
| Convert to hex, separated with : | |
| First part is netmask /24 = 18 | |
| 18 | |
| Next part is network | |
| 192.168.0.0 | |
| 192 = C0 | |
| 168 = A0 | |
| 0 = 00 | |
| 0 = 00 (But skip duplicate) | |
| Result: | |
| C0:A8:00 | |
| Gateway: | |
| 192.168.0.1 | |
| 192 = C0 | |
| 168 = A0 | |
| 0 = 00 | |
| 0 = 01 | |
| Result: | |
| C0:A8:00:01 | |
| Full string: | |
| 18:C0:A8:00:C0:A8:00:01 | |
| Do the same with 192.168.1.0/24 | |
| result: | |
| 18:C0:A8:01:C0:A8:00:FA | |
| Add: | |
| 00 for default route | |
| and | |
| C0:A8:00:01 which is our default gateway | |
| Full resulting string is: | |
| 18:C0:A8:00:C0:A8:00:01:18:C0:A8:01:C0:A8:00:FA:00:C0:A8:00:01 | |
| Which is basically: | |
| 192.168.0.0/24 -> 192.168.0.1 + 192.168.1.0/24 -> 192.168.0.1 + 0.0.0.0/0 -> 192.168.0.1 | |
| Converted to a hex string with a twist |
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