Misc
Encryption/Hashing
Block Ciphers
- ECB - Electronic Code Block
- CBC - Cipher Block Chaining
- OFB - Output Feedback
- CTR - Counter
Common Encryption algorithms
| Name | Bits | Key length |
| DES | 64 | 56 |
| 3DES | 168 | 112 |
| IDEA | 128 | |
| RC4 | 128 | 40 |
| RC5 | 2048 | 0 |
| AES | 256 | |
| RSA | 2048 |
Linux Password Hashes
- 1 - MD5
- 2ay - Blowfish
- 5 - SHA256
- 6 - SHA512
DNS
| Record Type | Data |
| A |
IPv4 |
| AAAA | IPv6 |
| CNAME | canonical name |
| ANAME | |
| SOA | Start of Authority |
| NS | Name Server |
| MX | Mail Exchange |
| TXT | Text record for various (SPF, DMARC, etc) |
| PTR | Pointer record |
Zone transfers happen over TCP 53. DNS queries over 53