On Mon, 9 Aug 2004, Dinil Divakaran wrote:
1) Does ICMP source quench really work ?
Depends on what you mean by work. A TCP implementation is not required to care about this, but it looks like at least Linux does care to the same level as ECN notifications.
2) Is using ECN (Early Congestion Notification) a better way (than using source quench) to slow down the sender as quickly as possible ?
Only if both sides of the connection supports ECN, and only on bidirectional streams (TCP).
3) Is it also possible to send an ICMP packet back to the sender using iptables? If so, please give some info (or links to related) documents to do so.
Yes. See the REJECT target.
Thanks Henrik. But the REJECT target can send only ICMP error packets, if
I am correct. What I would like to send using iptables is ICMP source quench packet, and that is not possible using iptables, right ?
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