Fail to ping
Hi folks,
Ubuntu-6.06-LAMP-server-amd64 Dynamic IP I have satimis.homelinux.com registered with DYNDNS.ORG. I also have ddclient installed and running on this server. $ dpkg -l | grep ddclient Code:
ii ddclient 3.6.2-6ubuntu1 Update dynamic IP address at DynDNS.org But failed to ping my domain. $ sudo ping -c 3 satimis.homelinux.com Code:
PING satimis.homelinux.com (58.152.161.53) 56(84) bytes of data. Please advise how fix this problem. B.R. satimis |
Could it be a possible firewall? Or, could it be not entered in your hosts file? I have issues with servers that are on my own network and have public IP's yet I can't get to them by www.myserver.mydomain. All of my routers are Linux and it is proabably got to do with all of them being on the same subnet as my PC but all having public IP's. I probably need to dig out the old TCP/IP Routing handbook and do some more research. Anyway, take a look at the firewall and hosts table. Then repost.
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Hi ScooterB,
Tks for your advice. Quote:
I think the major problem coming from BIND and DNS files not properly configured. Postfix can't send email because BIND can't resolve the IP address. Default page of Apache2 and Webmin failed to start on browser. Previously they can. I'm now searching documents on the overall configuration of BIND and DNS. Tks. B.R. satimis |
I'm having my own issues with BIND right now. I have fighting with the correct syntax (even though it says that it is right!). I'm trying to stop it from being recursive and when I put the statement "recursive no" in the options section, it just pukes. Anyway, I have found that BIND is very sensitive regarding white space. It somehow knows the difference between spaces and tabs and doesn't like it if they aren't right. In your zone files make sure that all the white space is tabbed. I think that everything else is okay with just regular spaces. My DNS servers are all running Slackware so yours may be different. Just a thought though.
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Hi ScooterB,
Here is; $ cat /etc/default/bind9 Code:
OPTIONS="-u bind -t /var/lib/named" Quote:
B.R. satimis |
In the example you pasted where you tried to ping, the DNS resolution worked fine. It's showing you the correct IP address. What host were you trying to ping from, your server? If you're using NAT then it's not going to work... It would try to send the packets from your server, out to the Internet, at which point they would be routed back to you again, back through the NAT, which would result in triangular routing. Try to ping it from some place on the Internet instead (one of the DNS tools sites, or a friend's box).
The second thing is, ping is very unreliable. A lot of ISPs filter out ICMP echo requests or echo replies. The best way to test is to telnet to the port of the service you're trying to reach. For instance, if you're trying to reach an HTTP server, do $ telnet <my hostname> 80. For SMTP (e-mail) it would be $ telnet <my hostname> 25, etc... |
That's a very good point chort. I have a friends box that I remote into and use for testing. He's on a different ISP and a different Public IP subnet so it gives me accurate data. Satimis, the zone files in Slackware are /var/named/pz/mydomain. I am not exactly sure where they are in your distro. Take alook and let us know. For a place to ping outside your network try http://www.dnsstuff.com
They are the best! |
Hi folks,
"satimis.homelinux.com" may have problem. On browser running "satimis.homelinux.com"/"www.satimis.homelinux.com" can't display the homepage. I have registered another free domain "satimis.freeddns.com" $ sudo ping -c 3 satimis.freeddns.com Code:
Password: B.R. satimis |
Is this the same exact machine only with a different IP and domain?
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Hi ScooterB,
Quote:
But I failed to sent mail. $ sudo telnet localhost 25 Code:
Password: $ su Password: # telnet localhost 25 Code:
Trying 127.0.0.1... Code:
Trying 127.0.0.1... Code:
Trying 127.0.0.1... Tks. B.R. satimis |
What's wrong with the e-mail conversations? They look correct to me. The server will not terminate the connection after it accepts one message. You can start a new message with another MAIL FROM command. If you're done, you have to QUIT. Did the email never arrive at the destination? Check /var/log/maillog for errors.
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Hi chort,
Quote:
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Code:
.... found it is ISP I think ISP blocks port 25. Is there any way overcoming this blockage? TIA B.R. satimis |
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Hi ScooterB and folks,
My friend can visit my homepage on his WinXP box by running on browser; "satimis.freeddns.com:8080" port 80 being blocked by ISP. "satimis.homelinux.com:8080" "www.satimis.homelinux.com:8080" failed. I sent dyndns.org/com an email reporting the problem but without a reply. B.R. satimis |
Why is your Postfix trying to connect to it's own external IP address? Something is very wrong with your Postfix config.
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