HTTP Probe and DNS names

Hi,
I think i have a very simple question.
I want to setup an HTTP probe to test for URL, like http://www.cnn.com/
When I specify such "request" command under probe confif menu, I would assume that ACE will need to perform name resolution for www.cnn.com, but I cannot find any reference on how to configure DNS servers on ACE....
Am I missing something, or maybe I cannot do HTTP probe request by name and it had to be in a format of
http://<ip address/?
Thank you,
David

Hi,
My initial idea was to use the following command:
request method get url http://www.abc.com/
This is why I had my initial question about how will ACE resolve www.abc.com
Now thinking more about it I wonder if ACE even needs to resolve it at all.
I intend to apply the probe under rserver in serverfarm config, so ACE will know the IP address of where to send the probe from rserver configuration. If so, no DNS query is needed. ACE will just construct the packet and put relevant information in HTTP portion.... Am I correct?
If yes, what would be a difference is doing
header Host header-value "http://www.abc.com/"
vs
request method get url http://www.abc.com/
Thanks!
David

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Leopard Server Assistant and DNS Name

I am trying to setup Leopard Server in my home...
Server assistant launches I fill in the information and everything is fine... except I do not know what to put in the Server DNS name box. If I leave as is the server tools do not start because they cannot resolve the machine name.
In short what is going on...
1. How do you change the machine DNS name after server assistant has finished running?
2. What should I put in the DNS box?
MACServer.local? or MACSERVER
3. If I move to Dynamic DNS how do I change this later without having to re-install.
I have to admit that setting the server up, installing disks was easy but the DNS issue seems to be a real stumbling block for setting up a home server.
What am I doing wrong?
Message was edited by: Peter Jarvis
Message was edited by: Peter Jarvis

Tony,
Thanks for the response.
My concern is that a normal home user will not be able to setup MAC Server 10.5 very easily without knowledge of DNS. (I will walk through a setup later on in the mail)
My point is that the average user will not be able to setup MAC Server. They will have difficulty filling out the setup wizard correctly - for this reason I cannot recommend it to a rookie. What is needed is a really simple setup scenario script that can be given to user so they can setup a MAC server in the home to support file sharing, intranet web browsing and time machine backups and central storage for users.
Don't get me wrong a MAC admin will find the changes in 10.5 a significant and fine improvement over past mac server setups and a leap frog over the Windows and Linux setup experience. Don't let anyone persuade you that Microsoft Home Server is a easy either. (Actually corrupts data with certain apps) - great testing Microsoft
Back to good software...
MAC Server Setup example: (Newbie the new IT for the household)
Prior to setting up the server Newbie will need to define his system setup...
i.e.
Server Name [email protected]
IP Address: 192.168.0.100
Router: 192.168.0.1
Is the machine going to be a gateway or behind a firewall?
Will it distribute IP addresses for the home network etc?
These points are important as the DHCP and DNS go hand in hand. If the router is acting as a DNS relay and handing out IP addresses this may interfere with setting up the server to be primary DNS provider in the home.
Walkthrough 1: Scenario:
Setup the server to be a simple server with only file sharing, web server and time machine.
When asked Newbie enters:
Domain name: pkjserv.technophobic.com
Server Name:192.168.0.100 (DHCP) or manual
Nebie configures the server...
after setup the first thing that will happen is that Server Preferences will launch it will populate with the above server data...
Problem: Newbie trys to use server preferences and types in his password and fails to get access...
Why... because Server preferences expects "pkjserv.technophobic.com" to resolve but DNS is not setup yet...
OK so Newbie needs to setup DNS...
Newbie selects Applications/Server/Server Admin.app
(Newbie uses Magic to find Server Admin)
First prompt "Are you sure you want to use Server Admin?"
Newbie selects "Use Server Admin"
(Newbie uses Magic to know he has to do this)
Connect to server via IP address 168.192.0.100
Select DNS add click to box...
Expand 192.168.0.100 (our server)
Select DNS
Select zones...
Add primary zone / Select example.com
Change Primary zone to "technophobic.com."
Select "ns" and Change Nameserver to "pkjserv"
Under primary domain select machine change machine name to "pkjserv"
Select IP Addresses and change to 192.168.0.100
Click "save"
Newbie should have the following setup displayed:
Name Type Value
technophobic.com Primary Zone -
pkjserv Machine 192.168.0.100
0.168.192.in-addr.arpa Reverse Zone -
192.168.0.100 Reverse Mapping pkjserv.technophobic.com
------- Start DNS...
The problem here is that DNS is working but Newbies IP setup is still not referencing the DNS server so newbie will have to add it to the network settings.
Preferences / Network / advanced / DNS
once they have done this Newbie should be able to launch your browser and type "pkjserv.technophobic.com" and have it resolve to the web browser on the machine...
in short - this is difficult... hence my proposal that Apple need to create a simple setup scenario scripted document (fill in blanks) so a user can setup a MAC server in the home. Current docs do not allows an average user to install MAC OSX Server - I want a simple MAC Server that anyone can install...
Pete
Message was edited by: Peter Jarvis

Communicate with cRIO when IP Address and DNS Name changes over Network Variables

I am developing a LabVIEW software for an European Project using cRIO-9074 and RT Application Reployment to update all cRIO devices with the last version.
To communicate with the cRIO devices I have also developed some applications that are outside cRIO on LabVIEW Project that uses Network Variables to Read/Write to the devices.
When I am developing the software, everything works just fine because the LabVIEW Project knows the IP Address on my cRIO device. However, when I use RTAD to install the software and then my applications outside the LabVIEW Project, the aplications are, not always able to find the device when the IP address changes.
I have tried to replace the IP Address with the DNS Name but no success. When I change the router that is connected to the cRIO, the DNS Name also changes.
With this, my question is how can I solve this sistematic problem? Should I change any configuration on MAX, in LabVIEW Project and/or in the applications to be able to always find the cRIO? Is it possible to have a field on the application to insert the IP Address of the device to connect? If yes, how can I do this?
Best regards,

Quintino,
You can programatically open connecitons to Shared Variables. This allows you to decide at runtime the IP address, lib name and SV name you wish to connect to. I've attached a vi snippet the demonstrats an Action Engine to handle the connection to a SV named "Parameters".
I normally store the cRIO_Settings in a .INI file that is easy to modify.
Attachments:
SV Example.png ‏45 KB

HTTPS probe and Apache

Hello!
WE are using the following probe
probe https ORAINFLA-1-443
interval 30
passdetect interval 10
ssl version SSLv3
request method get url https://192.168.29.114/index.html.html
expect status 200 200
The probe is functional but the following logs are appeared on apache log.
[Mon Sep 20 14:52:06 2010] [error] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Mon Sep 20 14:52:07 2010] [error] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server orasso.kozpont.otp:443, client 192.168.29.124)
[Mon Sep 20 14:52:07 2010] [error] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Mon Sep 20 14:52:09 2010] [error] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server orasso.kozpont.otp:443, client 192.168.29.124)
[Mon Sep 20 14:52:09 2010] [error] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Mon Sep 20 14:52:10 2010] [error] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server orasso.kozpont.otp:443, client 192.168.29.125)
[Mon Sep 20 14:52:10 2010] [error] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Mon Sep 20 14:52:11 2010] [error] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server orasso.kozpont.otp:443, client 192.168.29.125)
What can i do?
Regard,
ps i tried connectino term foced w/wo

Sounds like an Oracle issue from what I could find with Google.
"NZE-28862: SSL connection failed
Cause: This error occurred because the peer closed the connection.
Action: Enable Oracle Net tracing on both sides and examine the trace output. Contact Oracle Customer support with the trace output."
For further details you may refer the Note: 244527.1 - Explanation of "SSL call to NZ function nzos_Handshake failed" error codes
There is unfortunately not much you can do on ACE.
You could try the following, but I have no idea if it will help or not
AceC6k2/Admin(config-probe-https)# connection term ?
forced Specifies forced TCP connection termination
AceC6k2/Admin(config-probe-https)# connection term forced
Gilles.

Unable to access gateway and DNS via VPN (L2TP) with Snow Leopard Server

Summary:
After rebooting my VPN server, i am able to establish a VPN (L2TP) connection from outside my private network. I am able to connect (ping, SSH, …) the gateway only until the first client disconnects. Then i can perfectly access all the other computers of the private network, but i cannot access the private IP address of the gateway.
Additionally, during my first VPN connection, my DNS server, which is on the same server, is not working properly with VPN. I can access it with the public IP address of my gateway. I can access it from inside my private network. A port scan indicates me that the port 53 is open, but a dig returns me a timeout.
Configuration:
Cluster of 19 Xserve3.1 - Snow Leopard Server 10.6.2
Private network 192.168.1.0/255.255.255.0 -> domain name: cluster
-> 1 controller, which act as a gateway for the cluster private network, with the following services activated:
DHCP, DNS, firewall (allowing all incoming traffic for each groups for test purposes), NAT, VPN, OpenDirectory, web, software update, AFP, NFS and Xgrid controller.
en0: fixed public IP address -> controller.example.com
en1: 192.168.1.254 -> controller.cluster
-> 18 agents with AFP and Xgrid agent activated:
en1: 192.168.1.x -> nodex.cluster with x between 1 and 18
VPN (L2TP) server distributes IP addresses between 192.168.1.201 and 192.168.1.210 (-> vpn1.cluster to vpn10.cluster). Client informations contain the private network DNS server informations (192.168.1.254, search domain: cluster).
_*Detailed problem description:*_
After rebooting the Xserve, my VPN server works fine except for the DNS. My client receives the correct informations:
Configure IPv4: Using PPP
IPv4 address: 192.168.1.201
Subnet Mask:
Router: 192.168.1.254
DNS: 192.168.1.254
Search domain: cluster
From my VPN client, i can ping all the Xserve of my cluster (192.168.1.1 to 18 and 192.168.1.254). If i have a look in Server Admin > Settings > Network, i have three interfaces listed: en0, en1 and ppp0 of family IPv4 with address 192.168.1.254 and DNS name controller.cluster.
The DNS server returns me timeouts when i try to do a dig from my VPN client even if i am able to access it directly from a computer inside or outside my private network.
After i disconnect, i can see in Server Admin that the IP address of my ppp0 interface has switch to my public IP address.
Then i can always establish a VPN (L2TP) connection, but the client receives the following informations:
Configure IPv4: Using PPP
IPv4 address: 192.168.1.202
Subnet Mask:
Router: (Public IP address of my VPN server)
DNS: 192.168.1.254
Search domain: cluster
From my VPN client, i can access all the other computers of my network (192.168.1.1 to 192.168.1.18) but when i ping my gateway (192.168.1.254), it returns me timeouts.
I have two "lazy" solutions to this problem: 1) Configure VPN and DNS servers on two differents Xserve, 2) Put the public IP address of my gateway as DNS server address, but none of these solutions are acceptable for me…
Any help is welcome!!!

I would suggest taking a look at:
server admin:vpn:settings:client information:network route definitions.
as I understand your setup it should be something like
192.168.1.0 255.255.255.0 private.
at least as a start. I just got done troubleshooting a similar issue but via two subnets:
http://discussions.apple.com/thread.jspa?threadID=2292827&tstart=0

OD, LDAP and DNS

I am new to LDAP and I believe I have everything setup correctly on the server (everything under Open Directory in SA says "Running", logs don't show any errors). However, I can not access the LDAP server from a client machine using Directory Access. I suspect that client machines still can not "see" my LDAP server.
I believe the issue may be with DNS and I am trying to understand the interaction between DNS and OD, etc. First off, I do not have DNS turned on for my Mac OS X Server since my ISP has always hosted our DNS. Is this a problem? Do I need DNS activated on the same server that I am running this LDAP server? I have tried entering the IP and DNS name on the client server using Directory Access and neither worked.

The requirement is that references using your server's Fully Qualified Domain Name look up to its IP Address and its IP Address looks up to its Fully Qualified Domain Name. If your ISP does that for you, and does it correctly, Merry Christmas!
All others must set up their own tiny DNS service to do the lookups. If you are behind an NAT firewall, you can Make Up whatever names you like and look them up locally, because they are invisible from the Internet.
Remember that each workstation must have the address of the DNS available to it. It needs to be configured in the TCP/IP setup or dispensed via DHCP. If you use your own DNS (highly recommended) you must also dispense or configure the next upstream DNS (your ISP's DNS Address).
"An Open Directory master requires properly configured DNS so it can provide single sign-on Kerberos authentication.
Make sure DNS service is configured to resolve fully qualified DNS names and provide corresponding reverse lookups.
DNS must resolve the fully qualified DNS name and provide reverse lookups for the Open Directory master server, all replica servers, and other servers that are members of the Kerberos realm.
You can use the Lookup pane of Network Utility (in /Applications/Utilities/) to do a DNS lookup of a server's DNS name and a reverse lookup of the server's IP address.
For instructions on setting up DNS service, browse Network Services Overview."
-- from Server Admin 10.4 Help: Kerberos is Stopped on an Open Directory Master or Replica
Message was edited by: Grant Bennet-Alder

IOS SLB HTTP Probe

Hi, I have a simple SLB setup with two servers running in directed mode and two 6509's running IOS SLB to balance between the two. The two servers are web servers and require authentication when hit so I am just testing using a http probe and searching for the 401 code. Is there any gotcha's with configuring the credentials on the 6509 to log onto the webpage? Cheers, Brian

Can you post the following:
1. debug ip slb probe
2. debug ip slb probe conn
3. debug rtr error
4. debug rtr trace

Management point and Distribution point behind netscaler for virtual ip/dns name

Is it supported to place a server behind a netscaler for using a virtual IP/DNS name?
We are looking into placing our distribution points and management points behind the netscaler to provide firewall functionality.
We would point our clients to a different DNS name for each individual MP and DP to provide routing through the netscaler.
As far as I know this is only possible using IBCM.
Please let me know if this is possible without IBCM internally.

Using a different DNS name is problematic as there is no way to specify an alternate fqdn for a site system on the intranet. Clients use the actual fqdn of the system hosting the role; this is given out by the MP directly to the client based upon the site
system's actual name.
You could manipulate name resolution in a variety ways so ultimately the actual IP used wouldn't matter, but that's useless unless the client is using the proper name.
If you you could use the same name and IP, then it should work no problem as long as the traffic is properly delivered to the site system. Ultimately, nearly all client agent to site system traffic is nothing more than WebDAV via IIS on the site system so
just basic web traffic.
Jason | http://blog.configmgrftw.com | @jasonsandys

CUCM & CUP DNS and Domain name

Hello
CUCM 9.1, CUP 9.1 and CUC 9.1
I have not mentioned DNS or domain name on my CUCM and on my CUP, if i enable the DNS and domain name on the CUCM does it will change the license mac of CUCM AND CUP ???? which will cause me to rehost the license from the cisco licensing team.
thanks

Hi Jack,
You can do that. Nothing would happen.
please follow the links
https://supportforums.cisco.com/message/4109569#4109569
https://supportforums.cisco.com/thread/2227236
regds,
aman

DNS name and web service randomly changed

Hi all
I have a strange situation, i woke up this morning to find out that my DNS name has changed and my website does not work, I am pretty new to web server technology and when i set the server up i chose the name "intranet" to be the server's name, ever since i could access my website via http://intranet, but now it only works if i type http://intranet.local, Is there a way to make it work on http://intranet, i have not recently changed anything apart from installing a forum but thats it.

working now thanks anyway

Possible to change DNS name... and how

OK, working on an Advanced Server that was setup months ago. An active server used by a small workgroup. It was setup using server1.domain1.local DNS name and now would like to change it to server2.domain2.com Can this be done, if so how? It will have the same external and internal IP addresses.- Lewis

Hi Lewis
This has been discussed many times before. Use the changeip command. A search would reveal how to use it or you can simply consult the manual page for correct usage, man changeip.
Alternatively you could consult the Admin Manual?
http://images.apple.com/server/macosx/docs/CommandLine_Adminv10.5.pdf
Pages 68-69
Tony

How to find out the primary and failover DNS name

Hi;
This sounds very stupid, but could some one please tell me how to find out the name/dns name of the primary and failover server without using the CDS console.
any help is appreciated

Is this what you want?
$ /usr/lib/ldap/ldap_cachemgr -g
cachemgr configuration:
server debug level 0
server log file "/var/ldap/cachemgr.log"
number of calls to ldapcachemgr 12729
cachemgr cache data statistics:
Configuration refresh information:
Previous refresh time: 2005/08/07 23:54:59
Next refresh time: 2005/08/08 00:55:00
Server information:
Previous refresh time: 2005/08/14 15:15:00
Next refresh time: 2005/08/15 03:15:00
server: ldap1.example.com, status: UP
server: ldap2.example.com, status: UP
server: ldap3.example.com, status: UP
Cache data information:
Maximum cache entries: 256
Number of cache entries: 0
Gary

Setting DNS TTL to 0 for specific DNS names and IPs

A company we do business with has a service we are trying to contact over the internet. They have requested that we set the TTL for their DNS and IPs on a specific port to 0. Im having a hard time understanding what they are asking for. I thought that
DNS ttl is generally set by the Registrar. And can you even have ttl on an ip address? That doesnt make any sense tome. They are asking for screen shots of nslookups of 3 ips on port 1443 and they want to see the ttl set to 0. How would I do that on SBS2011/Server2008r2?
Obvously I only want this on the 3 ips and the dns name, I dont want to set the whole DNS infrastructre to a ttl of 0.

Sounds screwy to me!
Robert Pearman SBS MVP
itauthority.co.uk |
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Still cannot resolve "gethostbyaddr() and reverse DNS name" warnings.

"Mar 15 11:02:48 xs1 servermgrd: servermgr_dns: gethostbyaddr() and reverse DNS name do not match (xs1.dept.school.edu != xs1.dept.School.EDU), various services may not function properly - use changeip to repair and/or correct DNS"
I have two xserves, both of which keep generating the same warnings, ad nauseam, in /var/log/system.log and having followed all suggestions and instructions in discussions, technical notes, afp548.com, and from other sysadmin's I still cannot stop them. There do not seem to be any services affected, or at least not in an overt manner.
Both xserves run slightly different services: (xs1) AFP, Firewall, NetBoot, NFS, Open Directory (slave), Print and Web; and (xs2) AFP, Firewall, Open Directory (master) and Software Update.
On both xserves I have run the following commands/tests with correct results, yet still I get the warnings in system.log: "changeip -checkhostname" is correct, and "scutil --get HostName" is correct. The /etc/hostconfig file is correct with "HOSTNAME=-AUTOMATIC-".
The only thing I can consider is that when setting them up, I had entered the FQDN in all lower-case, but the reverse dns is not, our domain is capitalized, and the tld is in all caps on the DNS servers. I had ages ago issued the "changeip" command as recommended in the warning, to no effect, even though "changeip -checkhostname" says it's correct.
Where the heck to I look now? This is driving me nuts!
RackMac1,1 & RackMac3,1 Mac OS X (10.4.8)

>As of 10.4.6, Apple states to never change /etc/hostconfig's HOSTNAME entry.
Inside the little black box that Apple runs Mac OS X Server this might be good advice. However, in the real world, real servers are often outside of Apple's box (sometimes far outside) and you have to do certain things that Apple don't advise or 'support'.
I can't tell you how many things I run on my servers that are outside the box and judging by other posts on these boards I'm not the only one. You only have to look at DNS, web and mail for starters to see that Apple's model doesn't cover everyone's needs.

How can I override the DNS Servers and Domain Name used by my Airport Time Capsule?

The defaults picked up from my ISP's DHCP are to use the ISP's DNS servers and ISP's domain. I do not want this.
With my prior router I set the DNS servers to Google's Public DNS (8.8.8.8 and 8.8.4.4) and my domain to either "bannister.us" (which I own) or "bannister.home". I do not want simple names resolving to some ISP default. (Yes, I know exactly what this does.)
In the Apple AIrport Utility (version 6.3.2) the fields for DNS and Domain do not allow editing. (Why??)
Is there some way to override this?

Unfortunately not one that will work with the latest version TC.
The way around it is to use a different router.. It can be a very simple router.. I usually recommend units like the TP-Link WDR3600 as they take good third party firmware like gargoyle, openwrt, dd-wrt.. ie they have real controls and beyond that a proper Linux firmware with command line interface.
You can then change the TC over to static IP. It will not be the router.. but it will effectively become the local dhcp server.
I have adsl so I cannot reproduce your system.. I have a bridged modem.. a router.. AC66U.. and a TC.. but the TC is not in bridge.. it is in static IP mode.
Let me demonstrate.
By setting a range on the main router from 1-199 (leave a space.. ) so set the TC to 192.168.2.201 and then you can set DNS and domain as you like. Set the dhcp range (leave a space) you could use 203-253.. then I use the main router as 254.
It is brilliant.. all computers behind the TC receive the IP from the TC with whatever IP and dns (and domain although I haven't changed it).. Effectively the TC works as its own dhcp device.. but is merely a secondary dhcp server to the main unit.
(This gives me netflix which is why I do it.. from well outside the US).
It may be of use.
Why leave a space.. well it helps it to work.. I have not tested it but another person reported issues and found leaving a space .. ie last ip in the router.. 199, static ip 201.. first dhcp 203 (i used 205 to help me keep count!!). worked.. I have not tried to reproduce the problem.. so I reproduce the solution.. it might be like sheep jumping over the fence.. even if the fence was removed the sheep keep jumping over at the same place. Just say bahhh and do likewise.

HTTP Probe and DNS names

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