Henrik P. Hessel's questions

Why is this happening?

The Rootserver returns a wrong entry I fixed containing 5269.XXX.com. instead of 5269 XXX.com.

Macbook @ Home

; <<>> DiG 9.6.0-APPLE-P2 <<>> @8.8.8.8 srv _xmpp-server._tcp.XXX.com.    
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18412
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;_xmpp-server._tcp.XXX.com. IN SRV

;; ANSWER SECTION:
_xmpp-server._tcp.XXX.com. 64328 IN SRV 10 0 5269 XXX.com.

;; Query time: 21 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 28 03:16:45 2010
;; MSG SIZE  rcvd: 86

Rootserver

; <<>> DiG 9.6-ESV-R1 <<>> @8.8.8.8 srv _xmpp-server._tcp.XXX.com.
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27240
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;_xmpp-server._tcp.XXX.com. IN  SRV

;; ANSWER SECTION:
_xmpp-server._tcp.XXX.com. 52139 IN SRV 0 10 0 5269.XXX.com.

;; Query time: 7 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 28 03:23:23 2010
;; MSG SIZE  rcvd: 91

We're going to release a commercial API product very soon.

The API provides the ability to upload, covert and store different media formats. Uploaded files will be converted to open and closed media formats.

What's the best method to calculate a price for the different kinds of API Request Types like Video and Sound on the basis of the storage, traffic, load costs?

What's the best tool for generating server stats reports and a live monitoring? It feels like Webalizer got a bit behind.

Thanks!

I've got a strange port forwarding problem.

The port forwarding to my internal webserver (10.0.0.10 on Port 80) works without a problem but the port forwarding to a windows server (10.0.0.15) on port 3389 doesn't work. The port 3389 is open.

Any ideas? thanks!

#!/bin/sh
IPTABLES="/sbin/iptables"

$IPTABLES --flush
$IPTABLES --table nat --flush
$IPTABLES --delete-chain
$IPTABLES --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE
$IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 3389 -j DNAT --to 10.0.0.15:3389
$IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 80 -j DNAT --to 10.0.0.10:80
$IPTABLES -t nat -A PREROUTING -p tcp -i eth0 -d 188.40.XXX.XXX --dport 222 -j DNAT --to 10.0.0.10:22
$IPTABLES --append FORWARD --in-interface eth1 -j ACCEPT

Just asking for advice: Is there any reason NOT to install the OCS on the same Machine as Exchange?

I'm running OCS 2007 R2 and Exchange 2010 (including the UM Role)

I've got an Access database from one of our clients and want to import this data into a new MSSQL Server 2008 database structure I designed. It's similar to the Access Database (including all the columns and so on) but I normalized the entire database.

Is there any tool (microsoft tools preferred) to map the old database to my new design?

thanks

Anyone got a idea how to install the trace command on RHEL5 to monitor variable access? I already googled it and search via yum but nothing seems to work.

Is it possible to create a shared task folder for a specific usergroup on an Exchange Server 2010?

I'm testing the Unified Messaging Feature of Exchange 2010.

When I make a test call to my Voice Mailbox or the the Auto Attentant, my call gets accepted but no computer generated speech tells me what to do next. The line is just silent. No error in the eventlog.

Any ideas?

Thanks,
rAyt

I'm using this HVM File to create a new guest

kernel = "/usr/lib/xen-3.2-1/boot/hvmloader"
builder='hvm'
memory = 4096

# Should be at least 2KB per MB of domain memory, plus a few MB per vcpu.
shadow_memory = 64
name = "hessel-windows2008"
vif = [ 'ip=188.40.xx.xx,mac=00:16:3E:C1:8F:CE' ]

acpi = 1
apic = 1
disk = [ 'file:/home/xen/disks/hessel/win2008/win2008.img,hda,w', 'file:/home/xen/isopool/win2008_32.iso,hdc:cdrom,r' ]

device_model = '/usr/lib/xen/bin/qemu-dm'

#-----------------------------------------------------------------------------
# boot on floppy (a), hard disk (c) or CD-ROM (d) 
# default: hard disk, cd-rom, floppy
boot="dc"

sdl=0
vnc=1
vncdisplay=1 
vnclisten="0.0.0.0"
vncconsole=1
vncpasswd='howtoforge'

stdvga=0 

serial='pty'
usbdevice='tablet'

The guest is created without an error. But no vnc display is created. Any ideas, how to fix that?

prometheus:~# netstat -ant

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 127.0.0.1:615           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:53              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN
tcp        0    232 188.40.xx.xx:8080      195.36.75.26:54032      ESTABLISHED
tcp        0      0 188.40.xx.xx:8080      195.36.75.26:53085      ESTABLISHED
tcp6       0      0 :::8080                 :::*                    LISTEN
tcp6       0      0 :::53                   :::*                    LISTEN
tcp6       0      0 :::22                   :::*                    LISTEN
tcp6       0      0 ::1:6010                :::*                    LISTEN

Is is safe to install the XEN Kernel on a server with 12 GB RAM and a i7 Quadcore CPU?

MemTotal:     12462952 kB

The reason I'm asking is this.

Debian-50-lenny-32-minimal:/proc# uname -r
2.6.26-2-686-bigmem

Is a "bigmem kernel" necessary to adress the complete range of the 12 GB?

Since now, I used the vhost feature of apache2 to bind multiple domains to one public and static ip.

Now I'm setting up a XEN Host with 4 IPs, and several VMs, two of them are pure webservers. It's possible for these to 2 VMs to share one public ip? Eachone would have a set of vhosts on the same public ip.

Edit: Okay, what about a Host based redirection?

My company uses an HTTP Proxy, so I had to configure several config-files of my tools to access the internet via the the Proxy.

When users are at home, they won't be able to use that proxy (except when they use the VPN connection). Is it possible to simulate that proxy (same address, same port) but using the direct home connection of users?

Are there any better ways to handle this kind of proxy / mobile user situation?

so some colleagues and me are planning to merge our VPS Servers to one big standalone and each participant gets a separate Virtual Machine.

We split the available resources, so each VM gets about one quarter of the host resources (minus the resources for the Host System).

This there any reference which (free) Virtualization to choose? I worked a lot with VMWare ESX Barebone Servers and the whole Infrastructure Packet of VMWare and liked it a lot.

What Host System should we take? I tending to choose Debian 5 Lenny over Ubuntu 9.04 for overall security and stability matters (the Host System is going to be the SPOF). Is 512 MB RAM enough? I googled a lot but didn't find any real guidelines what to do, so I'm asking your expert opinions :)

Any help is appreciated. Thanks!

I trying to keep the user on the url www.mydomain.de, but Apache uses a 301 Permament Redirect to mydomain.de .How can I prevent this?

httpd.include for the vhost

<VirtualHost xx.xx.xx.xx:80>
    ServerName   mydomain.de:80
    ServerAlias   www.mydomain.de
    UseCanonicalName off
    SuexecUserGroup         mydomain psacln
    ServerAdmin  "[email protected]"
    DocumentRoot /var/www/vhosts/mydomain.de/httpdocs
</VirtualHost>

DNS Settings

    ; *** This file is automatically generated by Plesk ***
    $TTL    86400

    @       IN      SOA     ns.mydomain.de. info.mydomain.de. (
                            1246541440      ; Serial
                            10800   ; Refresh
                            3600    ; Retry
                            604800  ; Expire
                            360 )   ; Minimum

    mydomain.de.           IN NS   ns.mydomain.de.
    mydomain.de.              IN NS   ns2.hans.hosteurope.de.
    ns.mydomain.de.                IN A    92.51.134.24
    mydomain.de.           IN A    92.51.134.24
    webmail.mydomain.de.           IN A    92.51.134.24
    mail.mydomain.de.              IN A    92.51.134.24
    science.mydomain.de.           IN A    92.51.134.24
    test.mydomain.de.              IN A    92.51.134.24
    testing.mydomain.de.           IN A    92.51.134.24
    ftp.mydomain.de.               IN CNAME        mydomain.de.
    www.mydomain.de.               IN CNAME        mydomain.de.
    *.webmail.mydomain.de.                 IN CNAME        mydomain.de.
    mydomain.de.           IN MX  10 mail.mydomain.de.
    mydomain.de.           IN TXT  "v=spf1 +a +mx -all"

Any Ideas, why this is happening? Thanks!

Edit: Thanks Chaos for your Input (cannot vote your answer up yet) , but unfortunately, it still doesn't work.

Fiddler2 Output

GET / HTTP/1.1
Accept: */*
Accept-Language: de
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.21022; .NET CLR 3.5.30729; .NET CLR 4.0.20506; InfoPath.2; .NET CLR 3.0.30729)
Host: www.mydomain.de
Proxy-Connection: Keep-Alive


HTTP/1.0 301 Moved Permanently
Date: Thu, 02 Jul 2009 18:38:34 GMT
Server: Apache/2.2.8 (Ubuntu) DAV/2 SVN/1.5.1 mod_ssl/2.2.8 OpenSSL/0.9.8g mod_python/3.3.1 Python/2.5.2 PHP/5.2.10 mod_perl/2.0.3 Perl/v5.8.8
X-Powered-By: PHP/5.2.10
X-Pingback: http://mydomain.de/xmlrpc.php
Location: http://mydomain.de/
Content-Length: 0
Content-Type: text/html; charset=UTF-8
X-Cache: MISS from dezntpx01.computacenter.de
X-Cache-Lookup: MISS from dezntpx01.computacenter.de:8081
X-Cache: MISS from dezntpx03.computacenter.de
X-Cache-Lookup: MISS from dezntpx03.computacenter.de:8081
Via: 1.0 dezntpx01.computacenter.de:8081 (squid/2.7.STABLE5), 1.0 dezntpx03.computacenter.de:8081 (squid/2.7.STABLE5)
Connection: keep-alive
Proxy-Connection: keep-alive