Date: Sat, 26 May 2001 21:35:25 -0400 From: Normand Leclerc <leclercn@videotron.ca> To: freebsd-stable@freebsd.org Subject: ip_divert blues (was natd blues) Message-ID: <3B1059DD.8090505@videotron.ca>
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I recently posted help on a slowdown problem when using natd. I
found out that ipfilter (ipnat) is doing the very same thing: slowdown.
I trimed down the kernel to almost nothing, I removed a network adapter
I didn't need; in brief, I did everything I could think of ... nothing
has changed. My cable modem is as slow as an ADSL.
I have two rules in my firewall when using natd:
- 100 divert natd all from any to any via rl0
- 200 pass all from any to any
On the nat machine, I start a transfer with my ISP's ftp server to be
able to reach maximum transfer speed. I get something like 50k/s. On
the fly, I add a third rule: 50 pass all from any to any. Suddently, my
transfer rate goes up to nearly 170k/s.
I removed all IPv6 options, all IP stuff I didn't need for nat. I
removed all comm ports, parallel ports to free irqs. I removed all my
NFS options (kept NFS server active). I just don't know what is that
slowdown! With 3.4 I didn't have this problem. I am seriously thinking
about reinstalling a 3.4 kernel on this machine.
The nat machine is a P90 with 32megs of ram. It has a 3com 3B905BTX
and a cheaper nic connected to the cable modem (realtek).
Ideas? Has the IP divertion become that slow?
Normand Leclerc
leclercn@videotron.ca
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