limited internet access

[gongotar]

im working with ubuntu 10.04 and i'm confused,i cant open some websites,read my inbox in yahoomail and use anti-filter, i'm dual booting with 7 but it work's fine in there,
another thing is that i,ve no problem with my ubuntu at uni,that means when im behind a proxy and not directly connected to the internet ,my ubuntu is fine and i can visit any site and use anti-filter.
if anyone could help me that would be very greatly appreciated.

[ptkobe]

Too wired.
You see some sites, but some you don't. It's random, or there are some sites you don't see ever? Something special about those sites?

It works at uni, but when you are directly connected it doesn't, but windows 7 works. What is directly connected? At your home, directly to a modem, no router?

Too wired.

[gongotar]

at home i'm directly connected to a medom,there's no need to set proxy and port in firefox,but at uni i'm behind a proxy server,i should set 192.168.1.3:3130 in my firefox connection setting.
and yes,there are some sites i dont see ever,it's not random(e.g) i cant see my inbox in yahoomail and read my mails

[ptkobe]

No, no ideas.

At uni, it works, so its not the browser, computer, firewall, flash or other configuration.

Windows 7 works at home, so itś not the home connection (a question mark here?)

A possible DNS resolution issue with the linux machine at home? DHCP? Uhmm... can't see how.

Sorry, don't know.
Try to find anything else that you do different at uni or when you boot to Windows.

Regards
Luis

PS: Any way, you may post your /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf and /etc/network/interfaces files, and the output of
$ ifconfig

Maybe something pops up.

[gongotar]

/etc/hosts
127.0.0.1 localhost
127.0.1.1 pateria-laptop

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
------------------------------------
/etc/resolv.conf
# Generated by NetworkManager
nameserver 217.218.155.104
nameserver 217.218.155.105
------------------------------------
/etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd: compat
group: compat
shadow: compat

hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: nis
--------------------------------------
/etc/network/interfaces
auto lo
iface lo inet loopback
----------------------
$ifconfig
eth0 Link encap:Ethernet HWaddr 00:1a:80:55:45:26
inet6 addr: fe80::21a:80ff:fe55:4526/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8634 errors:0 dropped:4 overruns:0 frame:0
TX packets:6489 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4772060 (4.7 MB) TX bytes:1637695 (1.6 MB)
Interrupt:18

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:511 errors:0 dropped:0 overruns:0 frame:0
TX packets:511 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:206764 (206.7 KB) TX bytes:206764 (206.7 KB)

ppp0 Link encap:Point-to-Point Protocol
inet addr:91.99.246.239 P-t-P:91.99.240.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:7563 errors:0 dropped:0 overruns:0 frame:0
TX packets:5747 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:4015323 (4.0 MB) TX bytes:1302035 (1.3 MB)
---------------------------
i've checked my home connection and i thing there's no problem with it,by the way i use bridging network protocol as wan interface

[ptkobe]

Only thing I can think of is your dial up connection is too slow (and maybe your DNS servers are too far), so some sites time out and reject your connection.

Its would be a strong possibility if the same happened with windows.

Regards
Luis

[gongotar]

it did'nt happen with windows,i can visit any websites in windows at home,but thanks anyway,i think i should use windows at home!

[TaZMAniac]

Go into your connection manager and for both wired and wireless make sure you have
ipv6 disabled.

[ptkobe]

TaZMAniac show a pratical tip you may try.

But I think I saw the light You tell me.

Back to basis, what is different from linux home, windows home and uni?
...?
The ppp conection !!!
I'm guessing at uni you use eth0 and windows made a better job configuring ppp that you and linux.

If you think that could be the problem, review your ppp config. Searching the net, there's some issues with, for example, the default route.
"I added replacedefaultroute as the last line in my /etc/ppp/options file and now my applications are connected and function normally."

take a look at the logs
$ tail -f /var/log/ppp.log

Check this help
https://help.ubuntu.com/community/Di...to/SetUpDialer
and man pages from
$ man -k ppp

You may check your route table with
$ route
and post the results

If you wish, you may post also your /etc/ppp/options file, and /etc/ppp/peers/, but be careful about the last ones, because they contain sensitive info, so edit them first before posting.

ppp config may be a bi**h, so be resilient

regards
Luis

[gongotar]

i checked ipv6 and that was disabled,then i checked $ man -k ppp0,and nothing happend,after that i checked man --help,and i saw there $pppoeconf that configures ppp,so i checked $ pppoeconf and thats the result!my connection disconnects and connects to dsl connection frequently,i have several ppp's(ppp0,ppp1,ppp2,ppp3...)and several ip's!!!
i had a backup of dsl-provider,but that didnt help
i think restarting network configuration might be help,is there anyway to do that?

here are the results and files
--------------------
$ tail -f /var/log/ppp.log
tail: cannot open `/var/log/ppp.log' for reading: No such file or directory
tail: no files remaining

---------------
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
91.99.240.1.par * 255.255.255.255 UH 0 0 0 ppp0
91.99.240.1.par * 255.255.255.255 UH 0 0 0 ppp1
91.99.240.1.par * 255.255.255.255 UH 0 0 0 ppp2
91.99.240.1.par * 255.255.255.255 UH 0 0 0 ppp3
link-local * 255.255.0.0 U 1000 0 0 ppp1
default * 0.0.0.0 U 0 0 0 ppp3


--------------------
# /etc/ppp/options
#
# Originally created by Jim Knoble <jmknoble@mercury.interpath.net>
# Modified for Debian by alvar Bray <alvar@meiko.co.uk>
# Modified for PPP Server setup by Christoph Lameter <clameter@debian.org>
#
# To quickly see what options are active in this file, use this command:
# egrep -v '#|^ *$' /etc/ppp/options

# Specify which DNS Servers the incoming Win95 or WinNT Connection should use
# Two Servers can be remotely configured
# ms-dns 192.168.1.1
# ms-dns 192.168.1.2

# Specify which WINS Servers the incoming connection Win95 or WinNT should use
# ms-wins 192.168.1.50
# ms-wins 192.168.1.51

# Run the executable or shell command specified after pppd has
# terminated the link. This script could, for example, issue commands
# to the modem to cause it to hang up if hardware modem control signals
# were not available.
#disconnect "chat -- \d+++\d\c OK ath0 OK"

# async character map -- 32-bit hex; each bit is a character
# that needs to be escaped for pppd to receive it. 0x00000001
# represents '\x01', and 0x80000000 represents '\x1f'.
asyncmap 0

# Require the peer to authenticate itself before allowing network
# packets to be sent or received.
# Please do not disable this setting. It is expected to be standard in
# future releases of pppd. Use the call option (see manpage) to disable
# authentication for specific peers.
#auth
noauth
# ... Unfortunately, fixing this properly in the peers file
# (/etc/ppp/peers/ppp0, typically) is apparently incompatible with the
# paradigm used by gnome-system-tools and system-tools-backend for
# managing the peers files. So in Ubuntu Feisty we change the default.

# Use hardware flow control (i.e. RTS/CTS) to control the flow of data
# on the serial port.
crtscts

# Use software flow control (i.e. XON/XOFF) to control the flow of data
# on the serial port.
#xonxoff

# Specifies that certain characters should be escaped on transmission
# (regardless of whether the peer requests them to be escaped with its
# async control character map). The characters to be escaped are
# specified as a list of hex numbers separated by commas. Note that
# almost any character can be specified for the escape option, unlike
# the asyncmap option which only allows control characters to be
# specified. The characters which may not be escaped are those with hex
# values 0x20 - 0x3f or 0x5e.
#escape 11,13,ff

# Don't use the modem control lines.
#local

# Specifies that pppd should use a UUCP-style lock on the serial device
# to ensure exclusive access to the device.
lock

# Don't show the passwords when logging the contents of PAP packets.
# This is the default.
hide-password

# When logging the contents of PAP packets, this option causes pppd to
# show the password string in the log message.
#show-password

# Use the modem control lines. On Ultrix, this option implies hardware
# flow control, as for the crtscts option. (This option is not fully
# implemented.)
modem

# Set the MRU [Maximum Receive Unit] value to <n> for negotiation. pppd
# will ask the peer to send packets of no more than <n> bytes. The
# minimum MRU value is 128. The default MRU value is 1500. A value of
# 296 is recommended for slow links (40 bytes for TCP/IP header + 256
# bytes of data).
#mru 542

# Set the interface netmask to <n>, a 32 bit netmask in "decimal dot"
# notation (e.g. 255.255.255.0).
#netmask 255.255.255.0

# Disables the default behaviour when no local IP address is specified,
# which is to determine (if possible) the local IP address from the
# hostname. With this option, the peer will have to supply the local IP
# address during IPCP negotiation (unless it specified explicitly on the
# command line or in an options file).
#noipdefault

# Enables the "passive" option in the LCP. With this option, pppd will
# attempt to initiate a connection; if no reply is received from the
# peer, pppd will then just wait passively for a valid LCP packet from
# the peer (instead of exiting, as it does without this option).
#passive

# With this option, pppd will not transmit LCP packets to initiate a
# connection until a valid LCP packet is received from the peer (as for
# the "passive" option with old versions of pppd).
#silent

# Don't request or allow negotiation of any options for LCP and IPCP
# (use default values).
#-all

# Disable Address/Control compression negotiation (use default, i.e.
# address/control field disabled).
#-ac

# Disable asyncmap negotiation (use the default asyncmap, i.e. escape
# all control characters).
#-am

# Don't fork to become a background process (otherwise pppd will do so
# if a serial device is specified).
#-detach

# Disable IP address negotiation (with this option, the remote IP
# address must be specified with an option on the command line or in
# an options file).
#-ip

# Disable IPCP negotiation and IP communication. This option should
# only be required if the peer is buggy and gets confused by requests
# from pppd for IPCP negotiation.
#noip

# Disable magic number negotiation. With this option, pppd cannot
# detect a looped-back line.
#-mn

# Disable MRU [Maximum Receive Unit] negotiation (use default, i.e.
# 1500).
#-mru

# Disable protocol field compression negotiation (use default, i.e.
# protocol field compression disabled).
#-pc

# Require the peer to authenticate itself using PAP.
#+pap

# Don't agree to authenticate using PAP.
#-pap

# Require the peer to authenticate itself using CHAP [Cryptographic
# Handshake Authentication Protocol] authentication.
#+chap

# Don't agree to authenticate using CHAP.
#-chap

# Disable negotiation of Van Jacobson style IP header compression (use
# default, i.e. no compression).
#-vj

# Increase debugging level (same as -d). If this option is given, pppd
# will log the contents of all control packets sent or received in a
# readable form. The packets are logged through syslog with facility
# daemon and level debug. This information can be directed to a file by
# setting up /etc/syslog.conf appropriately (see syslog.conf(5)). (If
# pppd is compiled with extra debugging enabled, it will log messages
# using facility local2 instead of daemon).
#debug

# Append the domain name <d> to the local host name for authentication
# purposes. For example, if gethostname() returns the name porsche,
# but the fully qualified domain name is porsche.Quotron.COM, you would
# use the domain option to set the domain name to Quotron.COM.
#domain <d>

# Enable debugging code in the kernel-level PPP driver. The argument n
# is a number which is the sum of the following values: 1 to enable
# general debug messages, 2 to request that the contents of received
# packets be printed, and 4 to request that the contents of transmitted
# packets be printed.
#kdebug n

# Set the MTU [Maximum Transmit Unit] value to <n>. Unless the peer
# requests a smaller value via MRU negotiation, pppd will request that
# the kernel networking code send data packets of no more than n bytes
# through the PPP network interface.
#mtu <j>

# Set the name of the local system for authentication purposes to <j>.
# This is a privileged option. With this option, pppd will use lines in the
# secrets files which have <j> as the second field when looking for a
# secret to use in authenticating the peer. In addition, unless overridden
# with the user option, <j> will be used as the name to send to the peer
# when authenticating the local system to the peer. (Note that pppd does
# not append the domain name to <j>.)
#name <j>

# Enforce the use of the hostname as the name of the local system for
# authentication purposes (overrides the name option).
#usehostname

# Set the assumed name of the remote system for authentication purposes
# to <j>.
#remotename <j>

# Add an entry to this system's ARP [Address Resolution Protocol]
# table with the IP address of the peer and the Ethernet address of this
# system.
proxyarp

# Use the system password database for authenticating the peer using
# PAP. Note: mgetty already provides this option. If this is specified
# then dialin from users using a script under Linux to fire up ppp wont work.
# login

# If this option is given, pppd will send an LCP echo-request frame to the
# peer every n seconds. Normally the peer should respond to the echo-request
# by sending an echo-reply. This option can be used with the
# lcp-echo-failure option to detect that the peer is no longer connected.
lcp-echo-interval 30

# If this option is given, pppd will presume the peer to be dead if n
# LCP echo-requests are sent without receiving a valid LCP echo-reply.
# If this happens, pppd will terminate the connection. Use of this
# option requires a non-zero value for the lcp-echo-interval parameter.
# This option can be used to enable pppd to terminate after the physical
# connection has been broken (e.g., the modem has hung up) in
# situations where no hardware modem control lines are available.
lcp-echo-failure 4

# Set the LCP restart interval (retransmission timeout) to <n> seconds
# (default 3).
#lcp-restart <n>

# Set the maximum number of LCP terminate-request transmissions to <n>
# (default 3).
#lcp-max-terminate <n>

# Set the maximum number of LCP configure-request transmissions to <n>
# (default 10).
#lcp-max-configure <n>

# Set the maximum number of LCP configure-NAKs returned before starting
# to send configure-Rejects instead to <n> (default 10).
#lcp-max-failure <n>

# Set the IPCP restart interval (retransmission timeout) to <n>
# seconds (default 3).
#ipcp-restart <n>

# Set the maximum number of IPCP terminate-request transmissions to <n>
# (default 3).
#ipcp-max-terminate <n>

# Set the maximum number of IPCP configure-request transmissions to <n>
# (default 10).
#ipcp-max-configure <n>

# Set the maximum number of IPCP configure-NAKs returned before starting
# to send configure-Rejects instead to <n> (default 10).
#ipcp-max-failure <n>

# Set the PAP restart interval (retransmission timeout) to <n> seconds
# (default 3).
#pap-restart <n>

# Set the maximum number of PAP authenticate-request transmissions to
# <n> (default 10).
#pap-max-authreq <n>

# Set the maximum time that pppd will wait for the peer to authenticate
# itself with PAP to <n> seconds (0 means no limit).
#pap-timeout <n>

# Set the CHAP restart interval (retransmission timeout for
# challenges) to <n> seconds (default 3).
#chap-restart <n>

# Set the maximum number of CHAP challenge transmissions to <n>
# (default 10).
#chap-max-challenge

# If this option is given, pppd will rechallenge the peer every <n>
# seconds.
#chap-interval <n>

# With this option, pppd will accept the peer's idea of our local IP
# address, even if the local IP address was specified in an option.
#ipcp-accept-local

# With this option, pppd will accept the peer's idea of its (remote) IP
# address, even if the remote IP address was specified in an option.
#ipcp-accept-remote

# Disable the IPXCP and IPX protocols.
# To let pppd pass IPX packets comment this out --- you'll probably also
# want to install ipxripd, and have the Internal IPX Network option enabled
# in your kernel. /usr/doc/HOWTO/IPX-HOWTO.gz contains more info.
noipx

# Exit once a connection has been made and terminated. This is the default,
# unless the `persist' or `demand' option has been specified.
#nopersist

# Do not exit after a connection is terminated; instead try to reopen
# the connection.
#persist

# Terminate after n consecutive failed connection attempts.
# A value of 0 means no limit. The default value is 10.
#maxfail <n>

# Initiate the link only on demand, i.e. when data traffic is present.
# With this option, the remote IP address must be specified by the user on
# the command line or in an options file. Pppd will initially configure
# the interface and enable it for IP traffic without connecting to the peer.
# When traffic is available, pppd will connect to the peer and perform
# negotiation, authentication, etc. When this is completed, pppd will
# commence passing data packets (i.e., IP packets) across the link.
#demand

# Specifies that pppd should disconnect if the link is idle for <n> seconds.
# The link is idle when no data packets (i.e. IP packets) are being sent or
# received. Note: it is not advisable to use this option with the persist
# option without the demand option. If the active-filter option is given,
# data packets which are rejected by the specified activity filter also
# count as the link being idle.
#idle <n>

# Specifies how many seconds to wait before re-initiating the link after
# it terminates. This option only has any effect if the persist or demand
# option is used. The holdoff period is not applied if the link was
# terminated because it was idle.
#holdoff <n>

# Wait for up n milliseconds after the connect script finishes for a valid
# PPP packet from the peer. At the end of this time, or when a valid PPP
# packet is received from the peer, pppd will commence negotiation by
# sending its first LCP packet. The default value is 1000 (1 second).
# This wait period only applies if the connect or pty option is used.
#connect-delay <n>

# Packet filtering: for more information, see pppd(
# Any packets matching the filter expression will be interpreted as link
# activity, and will cause a "demand" connection to be activated, and reset
# the idle connection timer. (idle option)
# The filter expression is akin to that of tcpdump(1)
#active-filter <filter-expression>

# ---<End of File>---

--------------------
wvdial-pipe (/etc/ppp/peers)

noauth
name wvdial

plugin passwordfd.so

defaultroute
replacedefaultroute

--------------------
wvdial (/etc/ppp/peers)

noauth
name wvdial
usepeerdns
-----------
provider (/etc/ppp/peers)

# example configuration for a dialup connection authenticated with PAP or CHAP
#
# This is the default configuration used by pon(1) and poff(1).
# See the manual page pppd( for information on all the options.

# MUST CHANGE: replace myusername@realm with the PPP login name given to
# your by your provider.
# There should be a matching entry with the password in /etc/ppp/pateria-s
# and/or /etc/ppp/chap-patr.
user "myusername@realm"

# MUST CHANGE: replace ******** with the phone number of your provider.
# The /etc/chatscripts/pap chat script may be modified to change the
# modem initialization string.
connect "/usr/sbin/chat -v -f /etc/chatscripts/pap -T ********"

# Serial device to which the modem is connected.
/dev/modem

# Speed of the serial line.
115200

# Assumes that your IP address is allocated dynamically by the ISP.
noipdefault
# Try to get the name server addresses from the ISP.
usepeerdns
# Use this connection as the default route.
defaultroute

# Makes pppd "dial again" when the connection is lost.
persist

# Do not ask the remote to authenticate.
noauth
-------------------------
dsl-provider

# Minimalistic default options file for DSL/PPPoE connections

noipdefault
defaultroute
replacedefaultroute
hide-password
#lcp-echo-interval 30
#lcp-echo-failure 4
noauth
persist
#mtu 1492
#persist
#maxfail 0
#holdoff 20
-------------------