Network Problems

[jludwig]

On Saturday 16 April 2005 09:41 am, TE Dukes wrote:
> On Sat, 2005-04-16 at 09:18, jludwig wrote:
> > On Saturday 16 April 2005 08:59 am, edukes at alltel.net wrote:
> > > Hello,
> > >
> > > Still haven't figured this one out since 4-14.......
> > >
> > > Changed out nics, cables, switch.
> > >
> > > Server is now connecting to internet and all internet services are
> > > working as far as I can tell.
> > >
> > > Local machines on the internal network cannot connect.  Strange thing
> > > is they can ping internal and external IP addresses.  Samba services
> > > are working.
> > >
> > > Network Configuration tool reports status of the nics 'OK'.
> > >
> > > It has been a few years since I setup this network and have not needed
> > > to make any changes.  I am on DSL.  eth0 is not active at boot, eth1 is
> > > active at boot.  Is this correct?
> > >
> > > Network Configuration tool shows eth0 'Inactive'.  Shouldn't it be
> > > active after DSL and ppp0 start?
> > >
> > > Any help is greatly appreciated!!!!!!!!!!!!!
> >
> > 1) Try on xterm  > cat  /proc/sys/net/ipv4/ip_forward <
> > should return 1
>
> Thanks for responding!!
>
> cat /proc/sys/net/ipv4/ip_forward returns '1'
>
> > 2) Do you have a firewall and is IP forwarding there and properly set up.
>
> Yes, I use the ruleset found in the IP-Masqurading How-To,
> rc.firewall-2.4-stronger.  Been using it for over a year with no
> problems.
>
> > 3) Is your default route properly set?
> >
> > > route -n
> >
> > Should return something like;
> > Kernel IP routing table
> > Destination     Gateway         Genmask         Flags Metric Ref    Use
> > Iface 192.168.14.0    0.0.0.0         255.255.255.0   U     0      0     
> >   0 eth1 192.168.12.0    0.0.0.0         255.255.255.0   U     0      0  
> >      0 eth0 169.254.0.0     0.0.0.0         255.255.0.0     U     0     
> > 0        0 eth1 0.0.0.0         192.168.12.1    0.0.0.0         UG    0  
> >    0        0 eth0
> >
> >  Where eth0 and 192.168.12.1 is my server 2 ( I have 3 layers of firewall
> > ).
>
> route -n reports:
>
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 151.213.11.13   0.0.0.0         255.255.255.255 UH    0      0        0
> ppp0
> 10.10.0.0       0.0.0.0         255.255.255.0   U     0      0        0
> eth1
> 169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0
> eth1
> 0.0.0.0         151.213.11.13   0.0.0.0         UG    0      0        0
> ppp0
>
> Does this look OK?
>
> Thanks!!
>
> > --
> > John H Ludwig
Do as root
> iptables -v -n -L 
This will show the movement of packest through the firewall.
If there is a point where the packets "fall of the world" this should show 
where it happens.

-- 
John H Ludwig