Henrik Nordstrom | c279413 | 2004-01-22 15:04:24 +0000 | [diff] [blame] | 1 | This target is only valid in the |
| 2 | .B nat |
| 3 | table, in the |
| 4 | .B POSTROUTING |
| 5 | chain. It should only be used with dynamically assigned IP (dialup) |
| 6 | connections: if you have a static IP address, you should use the SNAT |
| 7 | target. Masquerading is equivalent to specifying a mapping to the IP |
| 8 | address of the interface the packet is going out, but also has the |
| 9 | effect that connections are |
| 10 | .I forgotten |
| 11 | when the interface goes down. This is the correct behavior when the |
| 12 | next dialup is unlikely to have the same interface address (and hence |
| 13 | any established connections are lost anyway). It takes one option: |
| 14 | .TP |
| 15 | .BR "--to-ports " "\fIport\fP[-\fIport\fP]" |
| 16 | This specifies a range of source ports to use, overriding the default |
| 17 | .B SNAT |
| 18 | source port-selection heuristics (see above). This is only valid |
| 19 | if the rule also specifies |
| 20 | .B "-p tcp" |
| 21 | or |
| 22 | .BR "-p udp" . |