save my FQDN (redhat 8.0)

Hello,


Recently I experienced a slowing startup of KDE applications.
Even worse, my friends cannot ping my public IP or access the
www.mywebsite.com.

I checked the validity of my router, adsl modem and
they are OK. For my NIC, I suspect it is not good but I have
no data supporting my judgement, the browsing of some website
is not slow, and I can access my website quickly from within
the LAN. So I would think that my FQDN is bad.

Owing to the configuration of a dynamic DNS for my website,
maybe I unnecessarily did some bad thing(s):

/etc/hosts:
127.0.0.1 localhost.localdomain localhost
61.170.245.55 www.mywebsite.com mywebsite.com

/etc/sysconfig/network:
NETWORKING=yes
HOSTNAME=www.mywebsite.com

/etc/resolv.conf:
domain mywebsite.com
search mywebsite.com
nameserver IP_OF_ISP_NAME_SERVER
nameserver NAME_OF_DYNAMIC_DNS_PROVIDER_NAME_SERVER

/etc/host.conf
order hosts,bind
multi on

I have also made changes to my sendmail configurations
related to domain, but that shouldn't impact the problems
here, I think.


Your input are highly appreciated!
Wenjie

In comp.os.linux.misc Wenjie <(E-Mail Removed)> wrote:
> So I would think that my FQDN is bad.

Did you changed it?

> Your input are highly appreciated!

What ifconfig returns?

Davide

Davide Bianchi <(E-Mail Removed)> wrote in message news:<bis4ac$c98cf$(E-Mail Removed)>...
> In comp.os.linux.misc Wenjie <(E-Mail Removed)> wrote:
> > So I would think that my FQDN is bad.
>
> Did you changed it?

Yes. There are some improvement. I believe I did something wrong
with my configurations. My ISP also contribute to the disaster.
BTW, if I change something in /etc/hosts, should I restart apache
or the network interface?

>
> > Your input are highly appreciated!
>
> What ifconfig returns?

eth0 Link encap:Ethernet HWaddr 00:05:5D:6D:60:BB
inet addr:192.168.123.1 Bcast:192.168.123.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9149 errors:0 dropped:0 overruns:0 frame:0
TX packets:10475 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:3721704 (3.5 Mb) TX bytes:4723843 (4.5 Mb)
Interrupt:5 Base address:0xd800

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:180 errors:0 dropped:0 overruns:0 frame:0
TX packets:180 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:120478 (117.6 Kb) TX bytes:120478 (117.6 Kb)


>
> Davide

Thanks,
Wenjie

In comp.os.linux.misc Wenjie <(E-Mail Removed)> wrote:
> BTW, if I change something in /etc/hosts, should I restart apache
> or the network interface?

No.
BTW, If 61.170.245.55 is your external IP, it works. I just checked and
it can be reached from outside. So, if you have a problem is in the
DNS resolution.

Davide

>So, this is the IP of your machine, you should have NAT enabled to
>translate this address into your fixed IP, and somewhere a DNS to
>translate www.yourdomain.com into the same fixed IP.

Now gethostbyname() and gethostbyaddr() works fine. Does it mean
my NAT is OK (Or probably I should understand NAT firstly)? I do
set the forwarding rule for 80 port in my router.

>
>It looks like your NAT doesn't work correctly or the DNS
>conversion isn't working.

Today some of my friends can access the website. My only modification
signicant is add my_public_ip www.mywebsitename.com entry in the
/etc/hosts? Does it really matter to the outside?

>
>First check if the NAT works, then the DNS. After all, check if
>your ISP block your port 80 or something.
>
How to check NAT? BTW, I got a long traceroute output for my website.
What could it imply?


>Davide
>
>No.
>BTW, If 61.170.245.55 is your external IP, it works. I just checked and
>it can be reached from outside. So, if you have a problem is in the
>DNS resolution.

Cool. How could you get that? my website is www.dayspot.com, it had
ever been hacked by somebody (web authentication: viking input password).

I have some ethereal records and it seems my ISP's name server has
problems to query my website name (to the dynamic DNS server).

>
>Davide
>
~

Thank You Davide. I have another thing not understood, my route output
is:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.123.0 * 255.255.255.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.123.254 0.0.0.0 UG 0 0 0 eth0

Why it is not 192.168.123.1 which is my private IP configured? Is there
any problem?


Best regards,
Wenjie

On Sun, 31 Aug 2003 06:21:43 -0700, Wenjie wrote:

>>BTW, If 61.170.245.55 is your external IP, it works. I just checked and
>>it can be reached from outside. So, if you have a problem is in the
>>DNS resolution.
>
> Cool. How could you get that? my website is www.dayspot.com, it had
> ever been hacked by somebody (web authentication: viking input password).

By going to http://61.170.245.55/

> Thank You Davide. I have another thing not understood, my route output
> is:
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 192.168.123.0 * 255.255.255.0 U 0 0 0 eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> default 192.168.123.254 0.0.0.0 UG 0 0 0 eth0
>
> Why it is not 192.168.123.1 which is my private IP configured? Is there
> any problem?

What part are you expecting to be 192.168.123.1? Why are you
expecting that? What do you think would work differently if
it was what you expect?

"Ed Murphy" <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)> ...
> On Sun, 31 Aug 2003 06:21:43 -0700, Wenjie wrote:
>
> >>BTW, If 61.170.245.55 is your external IP, it works. I just checked and
> >>it can be reached from outside. So, if you have a problem is in the
> >>DNS resolution.
> >
> > Cool. How could you get that? my website is www.dayspot.com, it had
> > ever been hacked by somebody (web authentication: viking input password).
>
> By going to http://61.170.245.55/

Perhaps I disclosed the IP somewhere. Or you can just get the IP from
my ifconfig output?


>
> > Thank You Davide. I have another thing not understood, my route output
> > is:
> > Kernel IP routing table
> > Destination Gateway Genmask Flags Metric Ref Use Iface
> > 192.168.123.0 * 255.255.255.0 U 0 0 0 eth0
> > 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> > default 192.168.123.254 0.0.0.0 UG 0 0 0 eth0
> >
> > Why it is not 192.168.123.1 which is my private IP configured? Is there
> > any problem?
>
> What part are you expecting to be 192.168.123.1? Why are you
> expecting that? What do you think would work differently if
> it was what you expect?

I don't quite understanding the routing table. I would think
192.168.123.0 is 192.168.123.1, but it seems not reasonable.
You already see my lacking of knowledge, could you explain the
destination section?

Thanks!
Wenjie

In comp.os.linux.misc Ed Murphy <(E-Mail Removed)> wrote:
> On Sun, 31 Aug 2003 16:31:30 -0700, Wenjie wrote:

>>> > Cool. How could you get that? my website is www.dayspot.com, it had
>>> > ever been hacked by somebody (web authentication: viking input password).
>>>
>>> By going to http://61.170.245.55/
>>
>> Perhaps I disclosed the IP somewhere.

> Yes, when you posted the contents of your /etc/hosts file.

> I believe the canonical basis of /etc/hosts is the following:

> 127.0.0.1 localhost
> 127.0.0.2 foo foo.dayspot.com

That's the wrong way round. It should be

127.0.0.2 foo.dayspot.com foo

(foo.dayspot.com is the canonical name).

I have no other comment!

Peter

(E-Mail Removed) (Wenjie) wrote in message news:<(E-Mail Removed). com>...
> Hello,
>
>
> Recently I experienced a slowing startup of KDE applications.
> Even worse, my friends cannot ping my public IP or access the
> www.mywebsite.com.
>
> I checked the validity of my router, adsl modem and
> they are OK. For my NIC, I suspect it is not good but I have
> no data supporting my judgement, the browsing of some website
> is not slow, and I can access my website quickly from within
> the LAN. So I would think that my FQDN is bad.
>
> Owing to the configuration of a dynamic DNS for my website,
> maybe I unnecessarily did some bad thing(s):
>
> /etc/hosts:
> 127.0.0.1 localhost.localdomain localhost
> 61.170.245.55 www.mywebsite.com mywebsite.com
>
> /etc/sysconfig/network:
> NETWORKING=yes
> HOSTNAME=www.mywebsite.com
>
> /etc/resolv.conf:
> domain mywebsite.com
> search mywebsite.com
> nameserver IP_OF_ISP_NAME_SERVER
> nameserver NAME_OF_DYNAMIC_DNS_PROVIDER_NAME_SERVER
>
> /etc/host.conf
> order hosts,bind
> multi on
>
> I have also made changes to my sendmail configurations
> related to domain, but that shouldn't impact the problems
> here, I think.
>
>
> Your input are highly appreciated!
> Wenjie


Many thanks to all of you.

I summarize what I am doing now on redhat8.0, I have a website
named as www.dayspot.com, registered with dynamic DNS service.
Hopefully it is right and accurate:

/etc/hosts:
127.0.0.1 localhost localhost.localdomain
127.0.0.2 blanche.dayspot.com blanche

/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=blanche

/etc/resolv.conf
domain dayspot.com
search dayspot.com
nameserver IP1_FROM_MY_ISP
nameserver IP2_FROM_MY_ISP

/etc/host.conf
order hosts,bind
multi on


BTW, I still don't understand the following routing table,
but it seems to work:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.123.0 * 255.255.255.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
default 192.168.123.254 0.0.0.0 UG 0 0 0 eth0


I would say that my ISP has a slow DNS server now. That's
another part of the problem contributing to some confusing
data.


See you later,
Wenjie