It's weird, the second!
I recently asked, how I can stop diald from locking my local network up. Now Diald
runs without problems, but it doesn't dialout, when I want to do from my other
machines a mailcheck or telnet. Only ping with an dotted number works. Whats wrong?
when I use as local and remote address in diald 0.0.0.0, the linuxbox doesn't accept
any incoming and outgoing ethernet connections. with 192.168.1.1 local and 192.168.1.2
remote everything works. Why??
I run a nameserver on the linuxbox and use ip-masquerading on the sl0 proxydevice from
diald.
Please, does anybody know something?
The linuxbox address goes as follows:
192.168.0.1
-------------------------------- My diald config (version 0.16)
-----------------------------
device /dev/modem
speed 38400
mode ppp
modem
crtscts
connect /etc/diald/ppp.connect
dynamic
local 192.168.1.1
remote 192.168.1.2
defaultroute
include /usr/lib/diald/standard.filter
----------------------------- standard.filter ----------------------------
# This is a pretty complicated set of filter rules.
# (These are the rules I use myself.)
#
# I've divided the rules up into four sections.
# TCP packets, UDP packets, ICMP packets and a general catch all rule
# at the end.
#------------------------------------------------------------------------------
# Rules for TCP packets.
#------------------------------------------------------------------------------
# General comments on the rule set:
#
# In general we would like to treat only data on a TCP link as signficant
# for timeouts. Therefore, we try to ignore packets with no data.
# Since the shortest possible set of headers in a TCP/IP packet is 40 bytes.
# Any packet with length 40 must have no data riding in it.
# We may miss some empty packets this way (optional routing information
# and other extras may be present in the IP header), but we should get
# most of them. Note that we don't want to filter out packets with
# tcp.live clear, since we use them later to speedup disconnects
# on some TCP links.
#
# We also want to make sure WWW packets live even if the TCP socket
# is shut down. We do this because WWW doesn't keep connections open
# once the data has been transfered, and it would be annoying to have the link
# keep bouncing up and down every time you get a document.
#
# Outside of WWW the most common use of TCP is for long lived connections,
# that once they are gone mean we no longer need the network connection.
# We don't neccessarily want to wait 10 minutes for the connection
# to go down when we don't have any telnet's or rlogin's running,
# so we want to speed up the timeout on TCP connections that have
# shutdown. We do this by catching packets that do not have the live flag set.
# --- start of rule set proper ---
# When initiating a connection we only give the link 15 seconds initially.
# The idea here is to deal with possibility that the network on the opposite
# end of the connection is unreachable. In this case you don't really
# want to give the link 10 minutes up time. With the rule below
# we only give the link 15 seconds initially. If the network is reachable
# then we will normally get a response that actually contains some
# data within 15 seconds. If this causes problems because you have a slow
# response time at some site you want to regularly access, you can either
# increase the timeout or remove this rule.
accept tcp 15 tcp.syn
# Keep named xfers from holding the link up
ignore tcp tcp.dest=tcp.domain
ignore tcp tcp.source=tcp.domain
# (Ack! SCO telnet starts by sending empty SYNs and only opens the
# connection if it gets a response. Sheesh..)
accept tcp 5 ip.tot_len=40,tcp.syn
# keep empty packets from holding the link up (other than empty SYN packets)
ignore tcp ip.tot_len=40,tcp.live
# make sure http transfers hold the link for 2 minutes, even after they end.
# NOTE: Your /etc/services may not define the tcp service www, in which
# case you should comment out the following two lines or get a more
# up to date /etc/services file. See the FAQ for information on obtaining
# a new /etc/services file.
accept tcp 120 tcp.dest=tcp.www
accept tcp 120 tcp.source=tcp.www
# Once the link is no longer live, we try to shut down the connection
# quickly. Note that if the link is already down, a state change
# will not bring it back up.
keepup tcp 5 !tcp.live
ignore tcp !tcp.live
# an ftp-data or ftp connection can be expected to show reasonably frequent
# traffic.
accept tcp 120 tcp.dest=tcp.ftp
accept tcp 120 tcp.source=tcp.ftp
#NOTE: ftp-data is not defined in the /etc/services file provided with
# the latest versions of NETKIT, so I've got this commented out here.
# If you want to define it add the following line to your /etc/services:
# ftp-data 20/tcp
# and uncomment the following two rules.
#accept tcp 120 tcp.dest=tcp.ftp-data
#accept tcp 120 tcp.source=tcp.ftp-data
# If we don't catch it above, give the link 10 minutes up time.
accept tcp 600 any
# Rules for UDP packets
#
# We time out domain requests right away, we just want them to bring
# the link up, not keep it around for very long.
# This is because the network will usually come up on a call
# from the resolver library (unless you have all your commonly
# used addresses in /etc/hosts, in which case you will discover
# other problems.)
# Note that you should not make the timeout shorter than the time you
# might expect your DNS server to take to respond. Otherwise
# when the initial link gets established there might be a delay
# greater than this between the initial series of packets before
# any packets that keep the link up longer pass over the link.
# Don't bring the link up for rwho.
ignore udp udp.dest=udp.who
ignore udp udp.source=udp.who
# Don't bring the link up for RIP.
ignore udp udp.dest=udp.route
ignore udp udp.source=udp.route
# Don't bring the link up for NTP or timed.
ignore udp udp.dest=udp.ntp
ignore udp udp.source=udp.ntp
ignore udp udp.dest=udp.timed
ignore udp udp.source=udp.timed
# Don't bring up on domain name requests between two running nameds.
ignore udp udp.dest=udp.domain,udp.source=udp.domain
# Bring up the network whenever we make a domain request from someplace
# other than named.
accept udp 30 udp.dest=udp.domain
accept udp 30 udp.source=udp.domain
# Do the same for netbios-ns broadcasts
# NOTE: your /etc/services file may not define the netbios-ns service
# in which case you should comment out the next three lines.
ignore udp udp.source=udp.netbios-ns,udp.dest=udp.netbios-ns
accept udp 30 udp.dest=udp.netbios-ns
accept udp 30 udp.source=udp.netbios-ns
# keep routed and gated transfers from holding the link up
ignore udp tcp.dest=udp.route
ignore udp tcp.source=udp.route
# Anything else gest 2 minutes.
accept udp 120 any
# Catch any packets that we didn't catch above and give the connection
# 30 seconds of live time.
accept any 30 any
-----------------------------My routing table----------------------------
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.1 * 255.255.255.255 UH 0 0 0 dummy0
192.168.1.1 * 255.255.255.255 UH 1 0 0 sl0
uvo-ts3.univie. * 255.255.255.255 UH 0 0 0 ppp0
192.168.0.0 * 255.255.255.0 U 0 0 49 eth0
loopback * 255.0.0.0 U 0 0 13 lo
default * 0.0.0.0 U 0 0 0 ppp0
default * 0.0.0.0 U 1 0 27 sl0
This machine dialed currently out.
Without dialout:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.1 * 255.255.255.255 UH 0 0 0 dummy0
192.168.1.1 * 255.255.255.255 UH 1 0 0 sl0
192.168.0.0 * 255.255.255.0 U 0 0 51 eth0
loopback * 255.0.0.0 U 0 0 14 lo
default * 0.0.0.0 U 1 0 27 sl0
The ppp-options:
lock
ifconfig output:
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:726 errors:0 dropped:0 overruns:0
TX packets:726 errors:0 dropped:0 overruns:0
dummy0 Link encap:10Mbps Ethernet HWaddr 00:00:00:00:00:00
inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0
TX packets:0 errors:0 dropped:0 overruns:0
eth0 Link encap:10Mbps Ethernet HWaddr 00:40:33:D9:19:40
inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:26844 errors:0 dropped:0 overruns:0
TX packets:22660 errors:0 dropped:0 overruns:0
Interrupt:12 Base address:0x340
sl0 Link encap:Serial Line IP
inet addr:192.168.1.1 P-t-P:192.168.1.2 Mask:255.255.255.0
UP POINTOPOINT RUNNING MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0
TX packets:250 errors:0 dropped:0 overruns:0
ip-masquerading
IP firewall forward rules, default policy: accept/masquerade
pkts bytes type prot opt tosa tosx ifname ifaddress source
destination ports
4 240 acc/m all ---- 0xFF 0x00 sl0 0.0.0.0 192.168.0.
0/24 0.0.0.0/0 n/a
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