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Router / ISP Change = strange internet (in gentoo only)
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|cJ|
n00b
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Joined: 27 May 2003
Posts: 37
Location: UK

PostPosted: Fri Oct 22, 2004 11:36 am    Post subject: Router / ISP Change = strange internet (in gentoo only) Reply with quote

ok i moved house got a new ISP and router

setup went fine and have no problems in wincack

setup appears to be fine in gentoo BUT some things just dont work, i can browse websites and connect to IRC but GAIM just does nothing when i try and connect and portage hardly ever works also, abcde also just sits there and does nothing when it looks for the CD name and track info

basically some programs just seem to have no conncetion while others work fine...

using 2.6 kernal
d-link router

??? 8O
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adaptr
Watchman
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Joined: 06 Oct 2002
Posts: 6730
Location: Rotterdam, Netherlands

PostPosted: Fri Oct 22, 2004 12:10 pm    Post subject: Reply with quote

And what is the configuration of your network ?

Code:
lsmod
ifconfig -a
route -n
cat /etc/resolv.conf
cat /etc/hosts
cat /etc/conf.d/net

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|cJ|
n00b
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Joined: 27 May 2003
Posts: 37
Location: UK

PostPosted: Sat Oct 23, 2004 7:49 pm    Post subject: Reply with quote

ok here it all is one after the other...

Code:

Module                  Size  Used by


eth0      Link encap:Ethernet  HWaddr 00:50:BA:5A:89:8D 
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:338 errors:0 dropped:0 overruns:0 frame:0
          TX packets:326 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:353567 (345.2 Kb)  TX bytes:34262 (33.4 Kb)
          Interrupt:10 Base address:0xe000

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
127.0.0.0       127.0.0.1       255.0.0.0       UG    0      0        0 lo
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
nameserver 192.168.1.1
# /etc/hosts:  This file describes a number of hostname-to-address
#              mappings for the TCP/IP subsystem.  It is mostly
#              used at boot time, when no name servers are running.
#              On small systems, this file can be used instead of a
#              "named" name server.  Just add the names, addresses
#              and any aliases to this file...
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/hosts,v 1.8 2003/08/04 20:12:25 azarah Exp $
#


127.0.0.1   localhost
127.0.0.1    cJ
# IPV6 versions of localhost and co
::1 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/conf.d/net:
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/conf.d/net,v 1.7 2002/11/18 19:39:22 azarah Exp $

# Global config file for net.* rc-scripts

# This is basically the ifconfig argument without the ifconfig $iface
#
#iface_eth0="0.0.0.0 broadcast 0.0.0.0 netmask 0.0.0.0"

# For DHCP set iface_eth? to "dhcp"
# For passing options to dhcpcd use dhcpcd_eth?
#
iface_eth0="dhcp"
#dhcpcd_eth0="..."

# For adding aliases to a interface
#
#alias_eth0="192.168.0.3 192.168.0.4"

# NB:  The next is only used for aliases.
#
# To add a custom netmask/broadcast address to created aliases,
# uncomment and change accordingly.  Leave commented to assign
# defaults for that interface.
#
#broadcast_eth0="192.168.0.255 192.168.0.255"
#netmask_eth0="255.255.255.0 255.255.255.0"


# For setting the default gateway
#
# gateway="eth0/0.0.0.0"


hope someone can help this is very annoying.. :roll:
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cprior
n00b
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Joined: 03 Jun 2004
Posts: 57
Location: #gentoo ;)

PostPosted: Sat Oct 23, 2004 7:57 pm    Post subject: Re: Router / ISP Change = strange internet (in gentoo only) Reply with quote

|cJ| wrote:
ok i moved house got a new ISP and router
...
basically some programs just seem to have no conncetion while others work fine...

That just sounds as if your new ISP does not have all ports opened. You are not by any chance on a campus/university network?

Contact them for a list of blocked ports. Concerning portage you might use emerge-websync.
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|cJ|
n00b
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Joined: 27 May 2003
Posts: 37
Location: UK

PostPosted: Sat Oct 23, 2004 8:03 pm    Post subject: Re: Router / ISP Change = strange internet (in gentoo only) Reply with quote

cprior wrote:
|cJ| wrote:
ok i moved house got a new ISP and router
...
basically some programs just seem to have no conncetion while others work fine...

That just sounds as if your new ISP does not have all ports opened. You are not by any chance on a campus/university network?


Contact them for a list of blocked ports. Concerning portage you might use emerge-websync.


na im pretty sure its not that since everything works in windows... and also im on a normal ISP that lots of pps use...
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speed_bump
Tux's lil' helper
Tux's lil' helper


Joined: 10 Jan 2004
Posts: 92
Location: Wisconsin, USA

PostPosted: Sat Oct 23, 2004 9:55 pm    Post subject: Reply with quote

You may want to look into the possibility that the dlink router is handling the MTU issues incorrectly. DSL ISPs that use PPPoE seem to be particularly susceptible to this. It's all rather nasty technical network geekery, so I'll cut to the chase. If you are using a DSL router/firewall with PPPoE, check the value of the MTU. If it's 1500, try setting it to 1492 and see what happens.

I'm not sure how to do this on a D-Link router, but it should be possible.

Geek synopsis if you're looking to do further Googling: It looks like a PMTU problem. This can arise when NAT devices are over aggressive in dropping ICMP packets.
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