Date: Thu, 26 Sep 2002 20:21:26 +0100 (WEST) From: Luis Almeida <laa@orion.ipt.pt> To: freebsd-ipfw@freebsd.org Cc: laa@ipt.pt Subject: dummynet traffic shaping + nat + rc.firewall ? Message-ID: <20020926201014.Q4135-100000@orion.ipt.pt>
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Hello
Sorry if this mailing-list is just for developer people!
Can anyone suggest the cause (or solution) for the following problem?
I have setup a FreeBSD4.6.2 box to act as a gateway (NAT + IPFW with 2
NIC).
I tried to use dummynet to shape the traffic and i created two pipes to
control the upload and the download traffic (both pipes with same
bandwith)(i am using rc.firewall file (simple) to setup the ipfw rules):
${fwcmd} add pipe 10 all from 192.168.1.0/24 to any out via ${oif}
${fwcmd} add pipe 20 all from any to 192.168.1.0/24 in via ${oif}
${fwcmd} pipe 10 config mask src-ip 0x000000ff bw 200Kbit/s queue
20Kbytes
${fwcmd} pipe 20 config mask dst-ip 0x000000ff bw 200Kbit/s queue
20Kbytes
The firewall and NAT runs is OK
The problem is that i can limit the download traffic
but the upload traffic is higher and not the same (it seems that the
upload traffic do not pass by pipe 10)
----------------------------------------------------------------------
calypso# ipfw pipe show
00010: 200.000 Kbit/s 0 ms 20 KB 0 queues (1 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0x00000000/0x0000
00020: 200.000 Kbit/s 0 ms 20 KB 1 queues (64 buckets) droptail
mask: 0x00 0x00000000/0x0000 -> 0x000000ff/0x0000
BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes
Pkt/Byte Drp
51 ip 0.0.0.0/0 0.0.0.51/0 8564 1122119 0 0
43
----------------------------------------------------------------------
Is there any right place to put those pipes on rc.firewall?
(i.e. after or before the divert rule)?
Is there any conflict with nat divert rule and (mask src-ip 0x000000ff) ?
Thank you for your help,
Bye Luis
email: laa@ipt.pt
------------------------My rc.firewall firewall_type="simple"
[Ss][Ii][Mm][Pp][Ll][Ee])
############
# This is a prototype setup for a simple firewall. Configure this
# machine as a named server and ntp server, and point all the
machines
# on the inside at this machine for those services.
############
# set these to your outside interface network and netmask and ip
oif="fxp0"
onet="193.137.5.0"
omask="255.255.255.0"
oip="193.137.5.9"
# set these to your inside interface network and netmask and ip
iif="fxp1"
inet="192.168.1.0"
imask="255.255.255.0"
iip="192.168.1.1"
setup_loopback
# Stop spoofing
${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
# Network Address Translation. This rule is placed here deliberately
# so that it does not interfere with the surrounding address-checking
# rules. If for example one of your internal LAN machines had its IP
# address set to 192.0.2.1 then an incoming packet for it after being
# translated by natd(8) would match the `deny' rule above. Similarly
# an outgoing packet originated from it before being translated would
# match the `deny' rule below.
case ${natd_enable} in
[Yy][Ee][Ss])
if [ -n "${natd_interface}" ]; then
${fwcmd} add divert natd all from any to any via
${natd_interface}
fi
;;
esac
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includesRESERVED-1,
#DHCP auto-configuration NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
${fwcmd} add pipe 10 all from 192.168.1.0/24 to any out via ${oif}
${fwcmd} add pipe 20 all from any to 192.168.1.0/24 in via ${oif}
${fwcmd} pipe 10 config mask src-ip 0x000000ff bw 200Kbit/s queue
20Kbytes
${fwcmd} pipe 20 config mask dst-ip 0x000000ff bw 200Kbit/s queue
20Kbytes
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to ${oip} 25 setup
# Allow access to our DNS
${fwcmd} add pass tcp from any to ${oip} 53 setup
${fwcmd} add pass udp from any to ${oip} 53
${fwcmd} add pass udp from ${oip} 53 to any
# Allow access to our WWW
${fwcmd} add pass tcp from any to ${oip} 80 setup
# Reject&Log all setup of incoming connections from the outside
${fwcmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fwcmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from ${oip} to any 53 keep-state
# Allow NTP queries out in the world
${fwcmd} add pass udp from ${oip} to any 123 keep-state
# Everything else is denied by default, unless the
# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
----------------------------my rc.conf-------------------
----------------------------------------
defaultrouter="193.137.5.1"
gateway_enable="YES"
hostname="calypso.ipt.pt"
ifconfig_fxp0="inet 193.137.5.9 netmask 255.255.255.0"
ifconfig_fxp1="inet 192.168.1.1 netmask 255.255.255.0"
kern_securelevel_enable="NO"
keymap="pt.iso.acc"
linux_enable="YES"
nfs_reserved_port_only="YES"
sendmail_enable="YES"
sshd_enable="YES"
usbd_enable="NO"
inetd_enable="NO"
firewall_enable="YES"
firewall_type="simple"
firewall_quiet="NO"
firewall_logging="NO"
firewall_flags=""
natd_enable="YES"
natd_interface="fxp0"
natd_flags=""
named_enable="YES"
# --- laa secure stuff
portmap_enable="NO"
icmp_drop_redirect="YES"
icmp_log_redirect="YES"
tcp_drop_synfin="YES"
--------------------------
thanks
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