Книга: Iptables Tutorial 1.2.2
Length match
Length match
The length match is used to match packets based on their length. It is very simple. If you want to limit packet length for some strange reason, or want to block ping-of-death-like behaviour, use the length match.
Table 10-19. Length match options
| Match | --length |
| Kernel | 2.4, 2.5 and 2.6 |
| Example | iptables -A INPUT -p tcp -m length --length 1400:1500 |
| Explanation | The example --length will match all packets with a length between 1400 and 1500 bytes. The match may also be inversed using the ! sign, like this: -m length ! --length 1400:1500 . It may also be used to match only a specific length, removing the : sign and onwards, like this: -m length --length 1400. The range matching is, of course, inclusive, which means that it includes all packet lengths in between the values you specify. |
Оглавление книги
Оглавление статьи/книги
- Addrtype match
- AH/ESP match
- Comment match
- Connmark match
- Conntrack match
- Dscp match
- Ecn match
- Hashlimit match
- Helper match
- IP range match
- Length match
- Limit match
- Mac match
- Mark match
- Multiport match
- Owner match
- Packet type match
- Realm match
- Recent match
- State match
- Tcpmss match
- Tos match
- Ttl match
- Unclean match