Hi!

I've installed FC4 these days to get rid of SuSE and ran into some networking troubles that seem tobe related to IPv6:

- I can access the internet w/ firefox (IPv6 disabled in about:config)
- I can ping hostnames, so DNS seems to work
- I can NOT access any repositories w/ yum nor update my system w/ up2date
- I can NOT access my external smtp- or pop-server w/ evolution

I have installed FC4 on different machines w/ the same result - and tried multiple firewall-settings.

I am connecting to the internet via a DSL-router. IP is provided by a DHCP, gateway- and DNS-settings are fine. I have no problems connecting to any internet-service w/ SuSE 9.3 (IPv6 globaly disabled) or Windows.

So it seems to be an IPv6-related problem. IPv6 is not activeted in the network-setting...

Any hints? I've googled for 2 days and found nothing that helped.

Thanx!

1) If you stopped the ip6tables service, try restarting it and see if the networking problems go away.

2) There was an often used ipv6 “fix” in FC2/3 involving adding the following lines to /etc/modprobe.conf and rebooting:

/etc/modprobe.conf:
...
alias ipv6 off
alias net-pf-10 off
...

If I do /sbin/service ip6tables start as root, I'll get "unrecogniced service"

I've added that to /etc/modprobe.conf, but it didn't change anything...
Here my modprobe.conf:
---
alias eth0 8139too
alias ipv6 off
alias net-pf-10 off
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
alias usb-controller ehci-hcd
alias usb-controller1 ohci-hcd
alias usb-controller2 uhci-hcd
---

When I ping any website I get fine results, e.g.
---
PING www.google.de (66.249.85.104) 56(84) bytes of data.
64 bytes from www.google.de (66.249.85.104): icmp_seq=0 ttl=247 time=56.2 ms
64 bytes from www.google.de (66.249.85.104): icmp_seq=1 ttl=247 time=56.2 ms
64 bytes from www.google.de (66.249.85.104): icmp_seq=2 ttl=247 time=56.4 ms
64 bytes from www.google.de (66.249.85.104): icmp_seq=3 ttl=247 time=56.8 ms

--- www.google.de ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 56.231/56.450/56.886/0.351 ms, pipe 2

But when I try to ping fedora.redhat.com, no packets are received:
---
PING fedora.redhat.com (209.132.177.50) 56(84) bytes of data.

--- fedora.redhat.com ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 2999ms
---

When I do yum list as root, I get different errors. Sometimes it's that yum can't find a valid base-url, sometimes it's that the protocol is not supported by the mirror... I have not changed any files in /etc/yum.repos.d so far.

hi there,
first all you must check if your yum config file and your update config file. after that try pinging your smtp server. also try installng your ipv6 package forcefully . this may make something work.

Hi!

My config files are still the FC4-standard, I didn't edit them yet. I can also ping my smtp and pop server by name.

I am very new to Fedora - how may I force installing the ipv6-packages?

By the way: I had the chance to try FC4 on a machine on a different network (other router, other firewall but the same ISP). There it worked without any problems. So it seems that the router and/or firewall in the office network are causing the trouble...