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  #1  
Old 16th March 2012, 01:49
n0fx n0fx is offline
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Default Dual NIC weird Issue, one crashes and one still works

I have ISPConfig 2.2 setup with two network cards. One NIC has an internal IP address, while the other one has a WAN IP. Sometimes the WAN IP crashes and stops responding to web requests in both port 80 and 81 (ISPConfig). I can still reach the server if I use the internal IP address on both ports 80 and 81.

Has anyone else experience this issue before? I had a feeling that maybe someone is DDosing my server but I'm not too sure if that's the case or that particular part just keeps crashing. I have to reboot the server in order to get it back to listen on the WAN IP and have the website load.

I only have one site setup on the ISPConfig server. When I try to load the site from the outside DNS name, it tries to connect to the site, it looks like it gives a response but then just times out.
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Old 16th March 2012, 15:42
falko falko is offline
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Could be an issue with your network card. Do you have a spare one that you can try?
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  #3  
Old 16th March 2012, 17:12
n0fx n0fx is offline
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Quote:
Originally Posted by falko View Post
Could be an issue with your network card. Do you have a spare one that you can try?
I'll give that a try, thanks for the suggestion. I'll let you know how it comes out.
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Old 21st May 2013, 03:11
n0fx n0fx is offline
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Quote:
Originally Posted by falko View Post
Could be an issue with your network card. Do you have a spare one that you can try?
Falko,

Sorry to reply so late but I switched out the network card on the server with an Intel one. It started to work with no problems for a year but now, I'm having the same issue again.

I can access the website from the Internal network fine. All the pages load but when I try to browse the website from the external WAN IP (direct connection from cable modem to the network card, it doesn't load.

I tried to disable fail2ban on the server to see if it was blocking connections but that didn't help. I looked under /etc/apache2/vhosts/Vhosts_ispconfig.conf file. There was 3 entries that looked a little strange.

It read like this:

###################################
#
# ISPConfig vHost Configuration File
# Version 1.0
#
###################################
#
NameVirtualHost 10.4.1.x:80 (my internal ip address)
<VirtualHost 10.4.1.x:80>
ServerName localhost
ServerAdmin root@localhost
DocumentRoot /var/www/sharedip
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
</IfModule>
</VirtualHost>
NameVirtualHost 1.2.3.4:80 (EXTERNAL IP ADDRESS FROM ISP)
<VirtualHost 1.2.3.4:80>
ServerName localhost
ServerAdmin root@localhost
DocumentRoot /var/www/sharedip
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
</IfModule>
</VirtualHost>
NameVirtualHost 1.2.3.4:80 (same IP as last entry, double entries!)
<VirtualHost 1.2.3.4:80>
ServerName localhost
ServerAdmin root@localhost
DocumentRoot /var/www/sharedip
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
</IfModule>
</VirtualHost>
#
#
######################################
# Vhost: www.mywebsite.com:80
######################################
#
#
<VirtualHost 1.2.3.4:80> (same as above WAN IP)
SSLCertificateChainFile /var/www/web1/ssl/gd_bundle.crt
ServerName www.mywebsite.com:80
ServerAdmin webmaster@mywebsite.com
DocumentRoot /var/www/web1/web
ServerAlias mywebsite.com
DirectoryIndex index.html index.htm index.php index.php5 index.php4 index.php3 in$
Alias /cgi-bin/ /var/www/web1/cgi-bin/
AddHandler cgi-script .cgi
AddHandler cgi-script .pl
ErrorLog /var/www/web1/log/error.log
AddType application/x-httpd-php .php .php3 .php4 .php5
php_admin_flag safe_mode Off
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
Alias /error/ "/var/www/web1/web/error/"
ErrorDocument 400 /error/invalidSyntax.html
ErrorDocument 401 /error/authorizationRequired.html
ErrorDocument 403 /error/forbidden.html
ErrorDocument 404 /error/fileNotFound.html
ErrorDocument 405 /error/methodNotAllowed.html
ErrorDocument 500 /error/internalServerError.html
ErrorDocument 503 /error/overloaded.html
AliasMatch ^/~([^/]+)(/(.*))? /var/www/web1/user/$1/web/$3
AliasMatch ^/users/([^/]+)(/(.*))? /var/www/web1/user/$1/web/$3
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
</IfModule>
</VirtualHost>
#
<IfModule mod_ssl.c>
<VirtualHost 1.2.3.4:443> (same ip as above)
SSLCertificateChainFile /var/www/web1/ssl/gd_bundle.crt
ServerName www.mywebiste.com:443
ServerAdmin webmaster@mywebsite.com
DocumentRoot /var/www/web1/web
ServerAlias mywebsite.com
DirectoryIndex index.html index.htm index.php index.php5 index.php4 index.php3 in$
Alias /cgi-bin/ /var/www/web1/cgi-bin/
AddHandler cgi-script .cgi
AddHandler cgi-script .pl
ErrorLog /var/www/web1/log/error.log
AddType application/x-httpd-php .php .php3 .php4 .php5
php_admin_flag safe_mode Off
AddType text/html .shtml
AddOutputFilter INCLUDES .shtml
SSLEngine on
SSLCertificateFile /var/www/web1/ssl/www.mywebsite.com.crt
SSLCertificateKeyFile /var/www/web1/ssl/www.mywebsite.com.key
Alias /error/ "/var/www/web1/web/error/"
ErrorDocument 400 /error/invalidSyntax.html
ErrorDocument 401 /error/authorizationRequired.html
ErrorDocument 403 /error/forbidden.html
ErrorDocument 404 /error/fileNotFound.html
ErrorDocument 405 /error/methodNotAllowed.html
ErrorDocument 500 /error/internalServerError.html
ErrorDocument 503 /error/overloaded.html
AliasMatch ^/~([^/]+)(/(.*))? /var/www/web1/user/$1/web/$3
AliasMatch ^/users/([^/]+)(/(.*))? /var/www/web1/user/$1/web/$3
SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown downgrade-1.0 for$
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]
</IfModule>
</VirtualHost>
</IfModule>
#
#


When I run the restart apache command, I get this error:

goldmine:/etc/apache2/sites-available# /etc/init.d/apache2 restart
Restarting web server: apache2[Mon May 20 16:55:16 2013] [warn] NameVirtualHost 1.2.3.4:80 has no VirtualHosts
... waiting [Mon May 20 16:55:17 2013] [warn] NameVirtualHost 1.2.3.4:80 has no VirtualHosts

I edited the /etc/apache2/vhosts/Vhosts_ispconfig.conf file and took out the duplicate external IP addresses and the error went away but the external IP website still doesn't work. I restarted apache and the error went away but still couldn't connect.

This is my ifconfig:

eth0 Link encap:Ethernet HWaddr 00:02:a5:4f:19:84
inet addr:1.2.3.4 Bcast:1.2.3.5 Mask:255.255.255.248
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

eth2 Link encap:Ethernet HWaddr 00:06:5b:fc:6c:17
inet addr:10.4.1.x Bcast:10.4.1.x Mask:255.255.255.0
inet6 addr: fe80::206:5bff:fefc:6c17/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1001815 errors:0 dropped:0 overruns:0 frame:0
TX packets:1452157 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:69329704 (66.1 MiB) TX bytes:2144385908 (1.9 GiB)
Interrupt:29

eth3 Link encap:Ethernet HWaddr 00:02:a5:4f:19:85
inet addr:1.2.3.4 Bcast:1.2.3.4 Mask:255.255.255.248
inet6 addr: fe80::202:a5ff:fe4f:1985/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2086 errors:0 dropped:0 overruns:0 frame:0
TX packets:4123 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:347250 (339.1 KiB) TX bytes:1004545 (981.0 KiB)

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:215 errors:0 dropped:0 overruns:0 frame:0
TX packets:215 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:19597 (19.1 KiB) TX bytes:19597 (19.1 KiB)

The physical network is setup with 3 network cards. The first one is the built-in Dell one with dual nics (the one with 10.4.1.x), another is an Intel card with one port, which is the set with the external WAN IP. This card originally connected to the cable modem. Last, is the newest Intel dual nic card, which I replaced the faulty Intel one above, which has the external wan IP configured it. This port is connected to the cable modem, other was not setup with an IP or connected with any wiring.

I SSH'd into the box with the internal IP address and pinged the external IP and it responds with a ping but it doesn't work when I'm from the outside.

This is a really weird problem and I can't seem to figure it out. I already tried reloading the machine (rebooting), disabling the eth0 interface (ifconfig eth0 down), modifying the /etc/apache2/vhosts/vhosts_ispconfig.conf file. Restarting /etc/init.d/apache2.

I'm running ISPConfig v2.2 on a debian 5.0.1 (lenny) with one default site. There are no other websites being hosted other than my main site. I tried also looking at /etc/apache2/httpd.conf but the file is totally empty (no text in there). I don't know if ISPConfig uses that file or not, so I couldn't troubleshoot it from that aspect.

Any help would be appreciated.
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