On Wed, 29 Jul 1998, David A. Ranch wrote:
>
> >with kernel 2.0.35, with cacheing named, and sometimes it works well, and
> >sometimes not. What doesn't work well is a Win 95 box on my network
> >looking at http://www.linuxhq.com (and many others).
>
> Did this happen with 2.0.34? Personally, this sounds like our
> famous MTU bug. Set your Internet connection's MTU to 1500
> and try again.
I've only set this up on the new kernel. My MTUs were set as:
W95(MTU=1500)-ethernet--(MTU=1006)eth0:Linux:diald(MTU1500)-phone-internet
Now:
W95(MTU=1500)-ethernet--(MTU=1500)eth0:Linux:diald(MTU1500)-phone-internet
It works fine now. I hate running into infamous bugs. Thank you.
I would guess that the route had fragmented the longer web pages, leaving
the short 'this page isn't here' pages to get through un-fragmented,
causing my spurious problem.
Is this problem also fixed with the MTU patch
http://www.indyramp.com/mirrors/ipmasq/masq-mtu-fix-0.3.patch.gz referred
to on the http://www.indyramp.com/mirrors/ipmasq/ resources page?
Dave.
PS: My working setup for diald, dynamic IP with first connection contact,
Linux 2.0.35/slackware, etc. is pasted on the end, along with the program
I used to generate the info. Dave
>
> --DAvid
> .----------------------------------------------------------------------------.
> | David A. Ranch - Remote Access/Linux/PC hardware [EMAIL PROTECTED] |
> !---- ----!
> `----- For more detailed info, see http://www.ecst.csuchico.edu/~dranch -----'
>
.................................................................
Dave Forrest [EMAIL PROTECTED]
(804)-979-8634 http://watt.seas.virginia.edu/~drf5n
Working Configuration:
#### cat /etc/rc.d.rc.ipfw
#!/bin/sh
set -x ; # set +x;
# Setup IP firewalling/masquerading
# see http://www.indyramp.com/masq/
INSIDE=192.168.102.0/24
ANYWHERE=0.0.0.0/0
OUTSIDE=${ANYWHERE}
# Flush all commands
/sbin/ipfwadm -F -f
/sbin/ipfwadm -I -f
/sbin/ipfwadm -O -f
#per IP Masquerade Mini-Faq:
# http://www.indyramp.com/mirrors/ipmasq/ipmasq-HOWTO.html
/sbin/ipfwadm -O -p accept
/sbin/ipfwadm -I -p accept
/sbin/ipfwadm -F -p deny
/sbin/ipfwadm -I -i deny -W sl0 -S ${INSIDE} -D ${ANYWHERE}
/sbin/ipfwadm -F -a m -S ${INSIDE} -D ${OUTSIDE}
# enable first-packet re-writing per
# http://www.linuxhq.com/patch/20-p0468.html
echo 1 > /proc/sys/net/ipv4/ip_dynaddr
# handy commands:
# cd /lib/modules/`uname -r`/ipv4 ; ls -a ip_masq* # lists the ipmasq
modules
# grep '' /proc/sys/net/ipv4/* # shows the ip kernel setups
# ipfwadm -F -l ; ipfwadm -I -l ; ipfwadm -O -l ; ipfwadm -M -l # lists
# ifconfig #
#### ipfwadm -F -l ; ipfwadm -I -l ; ipfwadm -O -l ; ipfwadm -M -l
IP firewall forward rules, default policy: deny
typ prot source destination ports
msq all localnet/24 anywhere n/a
IP firewall input rules, default policy: accept
typ prot source destination ports
den all localnet/24 anywhere n/a
IP firewall output rules, default policy: accept
IP masquerading entries
prot expire source destination ports
tcp 03:15.44 hob.forrest 204.209.212.113 1192 (61495) ->
wwwtcp 10:34.18 hob.forrest alyssa.indyramp.com 1197 (61499) ->
wwwtcp 10:41.42 hob.forrest dijon.nais.com 1199 (61500) ->
wwwtcp 14:13.65 hob.forrest watt.seas.virginia.edu 1178 (61482)
-> telnet
#### ls -a /lib/modules/`uname -r`/ipv4/ip_masq*
/lib/modules/2.0.35/ipv4/ip_masq_cuseeme.o
/lib/modules/2.0.35/ipv4/ip_masq_ftp.o
/lib/modules/2.0.35/ipv4/ip_masq_irc.o
/lib/modules/2.0.35/ipv4/ip_masq_quake.o
/lib/modules/2.0.35/ipv4/ip_masq_raudio.o
/lib/modules/2.0.35/ipv4/ip_masq_vdolive.o
#### grep '' /proc/sys/net/ipv4/* # shows the ip kernel setups
/proc/sys/net/ipv4/arp_check_interval:6000
/proc/sys/net/ipv4/arp_confirm_interval:30000
/proc/sys/net/ipv4/arp_confirm_timeout:500
/proc/sys/net/ipv4/arp_dead_res_time:6000
/proc/sys/net/ipv4/arp_max_tries:3
/proc/sys/net/ipv4/arp_res_time:500
/proc/sys/net/ipv4/arp_timeout:6000
/proc/sys/net/ipv4/ip_dynaddr:1
/proc/sys/net/ipv4/ip_forward:1
#### ifconfig #
lo Link encap:Local Loopback
inet addr:127.0.0.1 Bcast:127.255.255.255 Mask:255.0.0.0
UP BROADCAST LOOPBACK RUNNING MTU:3584 Metric:1
RX packets:3575 errors:0 dropped:0 overruns:0
TX packets:3575 errors:0 dropped:0 overruns:0
eth0 Link encap:10Mbps Ethernet HWaddr 00:40:05:24:34:84
inet addr:192.168.102.10 Bcast:129.168.102.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:316693 errors:0 dropped:0 overruns:0
TX packets:286995 errors:0 dropped:0 overruns:0
Interrupt:11 Base address:0x300
sl0 Link encap:Serial Line IP
inet addr:192.168.102.1 P-t-P:192.168.102.2 Mask:255.255.255.0
UP POINTOPOINT RUNNING MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0
TX packets:140 errors:0 dropped:0 overruns:0
ppp0 Link encap:Point-Point Protocol
inet addr:205.139.233.151 P-t-P:205.197.102.56
Mask:255.255.255.0
UP POINTOPOINT RUNNING MTU:1500 Metric:1
RX packets:2226 errors:0 dropped:0 overruns:0
TX packets:2510 errors:0 dropped:0 overruns:0
#### route -n # list the routing table w/o DNS lookups
Kernel routing table
Destination Gateway Genmask Flags MSS Window Use
Iface
192.168.102.2 * 255.255.255.255 UH 1500 0 0
sl0
205.197.102.56 * 255.255.255.255 UH 1500 0 0
ppp0
192.168.102.0 * 255.255.255.0 U 1006 0 98
eth0
127.0.0.0 * 255.0.0.0 U 3584 0 50 lo
default * * U 1500 0 18
ppp0
default * * U 1500 0 57
sl0
#### cat /etc/diald.conf
mode ppp
connect "chat -f /etc/chat_script.cstone"
device /dev/cua1
speed 115200
modem
lock
crtscts
local 192.168.102.1
remote 192.168.102.2
dynamic
defaultroute
fifo /var/adm/diald
proxyarp
include /usr/lib/diald/standard.filter
#### cat /etc/rc.d/check.ipfw
#!/bin/sh
#set -x ; # set +x; # Check the IP firewalling setup
# handy commands for checking the firewall:
echo -e '\n#### cat /etc/rc.d.rc.ipfw'
cat /etc/rc.d/rc.ipfw
echo -e '\n#### ipfwadm -F -l ; ipfwadm -I -l ; ipfwadm -O -l ; ipfwadm
-M -l'
ipfwadm -F -l ; ipfwadm -I -l ; ipfwadm -O -l ; ipfwadm
-M -l
echo -e '\n#### ls -a /lib/modules/`uname -r`/ipv4/ip_masq*'
ls -a /lib/modules/`uname -r`/ipv4/ip_masq*
echo -e "\n#### grep '' /proc/sys/net/ipv4/* # shows the ip kernel
setups"
grep '' /proc/sys/net/ipv4/* # shows the ip kernel
setups
echo -e '\n#### ifconfig #'
ifconfig #
echo -e '\n#### route -n # list the routing table w/o DNS lookups'
route -n # list the routing table w/o DNS lookups
echo -e '\n#### cat /etc/diald.conf'
cat /etc/diald.conf
echo -e '\n#### cat /etc/rc.d/check.ipfw'
cat /etc/rc.d/check.ipfw
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