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From Albert Kam <moonblade.w...@gmail.com>
Subject Re: Cannot access webapp outside the server box using a public domain name
Date Wed, 18 Sep 2013 09:58:56 GMT
> How exactly does it fail ?
Sorry, it failed with error message stating that it cannot connect to the
myweb.com:80;

> nslookup disregards the local "hosts" file
> What's with the other nodes' local "hosts" file ?
These lines gave me a brain jolt.
It's my mistake, as i mapped myweb.com to 127.0.0.1 locally on my laptop,
which is why it doesnt use dns to get the public ip.

Now that i commented the local mapping in my etc/hosts, everything works
great !
Thank you so much for your help !

Warm regards from Jakarta,
Albert Kam



On Wed, Sep 18, 2013 at 4:50 PM, André Warnier <aw@ice-sa.com> wrote:

> Albert Kam wrote:
>
>> I have a case where accessing the webapp within the server box is fine,
>> but accessing the webapp from outside the server box using the domain name
>> is problematic, but not so using the public ip address, which is
>> accessible.
>>
>> The content of the webapp is just a single index.html, so no JSPs, no
>> classes are involved.
>>
>> - On my web server, which is set for the public domain myweb.com,
>>   curl http://myweb.com works
>>   curl http://<public-ip-address> also works
>>   note : i registered the domain from the domain robot
>>
>> - On external nodes (not on the web server), i tried to access
>>   curl http://myweb.com fails
>>
>
> How exactly does it fail ?  Doesn't curl have some "verbose" option to
> give you the exact failure reason ?
>
>
>    But : curl http://<public-ip-address> works
>>
>> - Both on the web server and external nodes,
>>   nslookup myweb.com works, and returns the public ip address correctly
>>
>
> Just for info : nslookup disregards the local "hosts" file..
>
>
>
>> - I have even disabled ipv6 in my /etc/hosts and domain mapping
>>   So my current host file is very simple :
>>   127.0.0.1 localhost
>>
>
> Yes, but this concerns only your local host, which was already working
> fine, as per your indications above.
> What's with the other nodes' local "hosts" file ?
>
> On the Tomcat host, can you run the following command and paste the output
> here ?
>
> ifconfig -a
>
>
>
>
>
>
>
>> - Here my output of version.sh
>> Using CATALINA_BASE:   /usr/share/tomcat7
>> Using CATALINA_HOME:   /usr/share/tomcat7
>> Using CATALINA_TMPDIR: /usr/share/tomcat7/temp
>> Using JRE_HOME:        /usr/lib/jvm/java-7-oracle
>> Using CLASSPATH:
>> /usr/share/tomcat7/bin/**bootstrap.jar:/usr/share/**
>> tomcat7/bin/tomcat-juli.jar
>> Server version: Apache Tomcat/7.0.28
>> Server built:   Dec 8 2012 06:51:43
>> Server number:  7.0.28.0
>> OS Name:        Linux
>> OS Version:     3.2.0-4-amd64
>> Architecture:   amd64
>> JVM Version:    1.7.0_25-b15
>> JVM Vendor:     Oracle Corporation
>>
>> - Here's my server.xml
>> <?xml version='1.0' encoding='utf-8'?>
>>
>> <Server port="8005" shutdown="SHUTDOWN">
>>   <Listener className="org.apache.**catalina.core.JasperListener" />
>>   <Listener
>> className="org.apache.**catalina.core.**JreMemoryLeakPreventionListene**r"
>> />
>>   <Listener
>> className="org.apache.**catalina.mbeans.**GlobalResourcesLifecycleListen*
>> *er" />
>>   <Listener
>> className="org.apache.**catalina.core.**ThreadLocalLeakPreventionListe**ner"
>> />
>>
>>   <Service name="Catalina">
>>     <Connector port="80" protocol="HTTP/1.1"
>>                connectionTimeout="20000"
>>                URIEncoding="UTF-8"
>>                redirectPort="8443" address="<my-public-ip-**address>" />
>>
>>     <Engine name="Catalina" defaultHost="myweb.com">
>> <Host name="myweb.com"  appBase="webapps"
>> unpackWARs="true" autoDeploy="true">
>> <Alias>myweb.com</Alias>
>> <Valve className="org.apache.**catalina.valves.**AccessLogValve"
>> directory="logs"
>>    prefix="localhost_access_log." suffix=".txt"
>>    pattern="%h %l %u %t &quot;%r&quot; %s %b" />
>> </Host>
>>     </Engine>
>>   </Service>
>> </Server>
>>
>> - Here's my ifconfig :
>> root@Debian-70-wheezy-64-**minimal:/home/moonblade# ifconfig
>> eth0      Link encap:Ethernet  HWaddr d4:3d:7e:d8:ba:27
>>           inet addr:<public-ip-address>  Bcast:<public-ip-address>
>>  Mask:255.255.255.224
>>           inet6 addr: <public-ip-address-v6>/64 Scope:Link
>>           inet6 addr: <another-public-ip-address-v6>**/64 Scope:Global
>>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>>           RX packets:290094 errors:0 dropped:0 overruns:0 frame:0
>>           TX packets:169056 errors:0 dropped:0 overruns:0 carrier:0
>>           collisions:0 txqueuelen:1000
>>           RX bytes:241176295 (230.0 MiB)  TX bytes:27580533 (26.3 MiB)
>>           Interrupt:43 Base address:0x6000
>>
>> lo        Link encap:Local Loopback
>>           inet addr:127.0.0.1  Mask:255.0.0.0
>>           inet6 addr: ::1/128 Scope:Host
>>           UP LOOPBACK RUNNING  MTU:16436  Metric:1
>>           RX packets:192 errors:0 dropped:0 overruns:0 frame:0
>>           TX packets:192 errors:0 dropped:0 overruns:0 carrier:0
>>           collisions:0 txqueuelen:0
>>           RX bytes:26625 (26.0 KiB)  TX bytes:26625 (26.0 KiB)
>>
>> - no firewall, as the iptables are still empty :
>> root@Debian-70-wheezy-64-**minimal:/home/moonblade# iptables -L -n
>> Chain INPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain FORWARD (policy ACCEPT)
>> target     prot opt source               destination
>>
>> Chain OUTPUT (policy ACCEPT)
>> target     prot opt source               destination
>>
>> - my system
>> Linux Debian-70-wheezy-64-minimal 3.2.0-4-amd64 #1 SMP Debian
>> 3.2.46-1+deb7u1 x86_64 GNU/Linux
>>
>> Am i missing something in my server.xml ?
>>
>>
>>
>
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-- 
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The past no longer is. The future has not yet come.
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