Host name changed on server after router reboot?

I recently installed a new router and when I started my Mac Pro the server (10.7.5) Serverwould not respond and I received an error message stating the host name has changed on my server. I can not recall what I did nut I got the server working. I had to reboot teh router again and have received the following email:
From: [email protected] (System Administrator)
Subject: Network change notification for discussion.pharmweb.net
Date: 26 January 2013 12:48:52 GMT
To: [email protected]
The host name of discussion.pharmweb.net has changed to discussion.lan. Some services may not work correctly until they have been updated to use the new configuration.
I can not get the server to respond to web requests and am not sure what to change, Sharing is showing my local hostname as discussion.local
Help...

Are you sure it wasn't just the server's LAN IP that changed?
Is it set to Manual ?
If your server is behing a router with a NAT address, then a change in the public IP shouldn't have caused that error. I bet your LAN IP changed and now you don't have port mapping correct. pherhaps the public IP changed also, but my money is on the LAN address.
If its the LAN address, there is no point waiting for the ISP.
Set it back to the address it used before and make sure the router provides NAT with port mapping to that address.
Thats all in your control, not the ISP.

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I want to change IP and Host Name of application serve

our application server is on IBM AIX platform and now i want to change IP and Host Name of application server?

Hi Again;
For Ip please see:
How to change the IP Address for a Release 11i Instance ? [ID 364099.1]
How to Change IP Address in an Oracle Applications Environment [ID 553318.1]
PS:Please mention your EBS version
Regard
Helios

Change IP and Host name of the server

Hi,
Db :11.2.0.3
Os:Aix6
OS team are going change IP address and host name of the server which has ASM and DB.
What are the things we need to follow for this?
Thanks & Regards,
VN

OS team are going change IP address and host name of the server which has ASM and DB.
What are the things we need to follow for this?1. TNSNAMES.ORA files everywhere
2. LISTENER.ORA on server
If there are thin JDBC clients, change IP/hostname in their connection URLs.

Problem PAP2T reconnect after router reboot

Good Day at all,
I am italian user of VOIP system, and i find a big problem with the usage of
PAP2T adapter with italian NGI network and/or SQUILLO sip.
The problem is common to many many many, italian users:
when the WAN connection restart (after router reboot or temporaly internet failure) the adapter PAP2T don't want reconnect to the SIP server, i have test many configuration, and differet boot sequence of the router but the problem is always preasent.
but, if i change the SIP port with one other different, the system go online immediatly. when after this, i try to insert again the original SIP port, the systerm go down again.
(if i insert the original SIP port after Half hour, the system stay online)
I have disabled all protection and firewall of the router for test and make Port Redirect for all renge of port used form PAP2T but the problem is again preasent.
I have one XLS file with the detail of debug with all two cases.
At this poind i don't know if is a problem of server of NGI/SQUILLO (www.ngi.it) (sip.squillo.it) or is a problem of PAP2T firmware.
CAN HELP ME?
Best regards.

It seems to be the problem with a router partaially it is pap2t firmware problem. At least I had a long investigation on a similar problem. The internet connection drops, but pap2t does not know it and keeps sending NAT Keep Alive and Registration Messages. The Internet connection comes up with a different WAN IP. But the NAT table of the router (udp connections) is corrupted. This is a known problem in *nix, and many routers have linux based firmware. To restore udp packeges going out the solution is to issue
echo 0 > /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream
sleep 10
echo 180 > /proc/sys/net/ipv4/netfilter/ip_conntrack_udp_timeout_stream
After a long correspondence with firmware developers of my router it was implemented in the router's firmware. I do not have this problem now. It can be also fixed in pap2t firmware. Pap2t should not send NAT Keep Alive Messages if the registration fails.
Message Edited by Zyxmon on 10-10-2008 06:43 AM

Active Message When you have invalid host name in Proxy Server

I have an issue with one of our customers.
To communicate with any external parties, we have to define the host name in proxy server(Firewall).
I noticed that when we configure a WCF or HTTP adapter with an invalid host name of https url address, the messages remain active.
I am using ESB Toolkit in my implementation but I reproduced same issue using Orchestration with static port and dynamic port.
I traced the message using Fiddler and I noticed that we only have one hit with Status Code 407(407 proxy authentication required) and it is not retrying which is not a risk to my implementation. However, I consumed a web service using a console application
and I set an invalid host name for url but I noticed there are two hits in Fiddler one is 200 http status code and the second hit 407 http status code and I could catch the exception.
The question is: How to enforce BizTalk to suspend these messages or how to handle these messages?
Note that I did the followings trials but no lucks:
- I updated retry count to zero
- Delivery Notification of the Port is Transmitted
- updated closeTimeout, sendTimeout, openTimeout values
Thanks in Advance
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer

Hi Mohan,
You are getting "The remote name could not be resolved" because you are not using Proxy.
I tried to tweak on Retry Count(tried zero,1,2...). I am sure it is not retrying because there is not any network hits or packets in Fiddler or WireShark and messages stay forever.
ESB is not my issue because I reproduced same issue with a simple orchestration consuming a service with a static send port.
I have the following notes:
- In console application and Biztalk application using WireShark I can see same number and types of network packets in both cases.
- I tried to change https url to http with incorrect host name in this time retrying is working and message suspended after exceeding retry count.
- I tried to use https which is the required one with correct host name and change service name, I could see client OK Hello and server OK Hello and retying working fine and message suspended after that.
I think the issue with handshaking with proxy server because I could not see client Ok and Server ok hello when changing the host name.
There is another thread talking about an issue with active message and handshake.
https://social.technet.microsoft.com/Forums/en-US/736f0f72-ccc9-4a84-802a-7a1ff788a04a/ssl-2way-cert-incident-remains-active?forum=biztalkgeneral
But the question remains open that how we can handle this active message and why BizTalk not throwing an error?
Thanks,
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer

Satellite Pro M70 can't refresh IP address after router reboot

My Laptop isn't able to repair it's wireless connection if I reset the router. I have to power cycle the laptop to get it to connect again as it always gets stuck on getting network address... Any known issues about this with software patch or anything...?
Thanks
Huw D.

Hello Huw
As far as I know there are no known issues with WLAN connection and I dont know exactly what happen with your WLAN connection. After router reboot try to disable WLAN card for a short time, enable it again and try to establish connection again.
The settings are the same and nothing must be changed.
Bye

How to regenerate DemoIdentity.jks and DemoTrust.jks file when my host name changed?

I have some problems about SSL when my host name changed.
I cannot use DemoIdentity and DemoTrust from Weblogic 8.1 server in development
environment to remote startup ManagedServer , cause of my host name changed.
How to regenerate DemoIdentity.jks file and DemoTrust.jks file , when I don't
want to reinstall WLS8.1 ?
Thank you
Regards

use weblogic utilities utils.CertGen and utils.ImportPrivateKey

My host name changes every few days, since Xmas adding a macbook its changed 6 times. Do I need to stop this? Does it cause problems with sharing between the iMac and macbook?

my host name changes every few days, since Xmas adding a macbook its changed 6 times. Do I need to stop this? Does it cause problems with sharing between the iMac and macbook?

There are several possible causes for this problem.
1. Two (or more) computers on the local network have the same Bonjour name, such as "X's-MacBook-Pro.local".
2. You have two simultaneous connections to the same local network: probably Ethernet and Wi-Fi. If applicable, disconnect the Ethernet cable or turn off Wi-Fi.
3. A Mac wakes from sleep due to network traffic. This is due to a bug in OS X that may only affect some models.
4. A device that gets its network address from the router wakes from sleep, and the address it was using before has been assigned to another device.
5. A third-party wireless router has incompatible settings or firmware. In that case, refer to the manufacturer or ISP for support. Restarting the router may help, temporarily.
6. See also this support article.
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My Photosmart D100a wireless printer keeps changing IP Address when router reboots.

My Photosmart D100a wireless printer keeps changing IP Address when router reboots.
This question was solved.
View Solution.

Let's set a static IP address for the printer:
- Print a Network Config Page from the front of the printer. Note the printer's IP address.
- Type that IP address into a browser to reveal the printer's internal settings.
- Choose the Networking tab, then Wireless along the left side, then the IPv4 tab.
- On this screen you want to set a Manual IP. You need to set an IP address outside the range that the router automatically sets (called the DHCP range). If you do not know the range, change the last set of numbers (those after the last '.') to 250
- Use 255.255.255.0 for the subnet (unless you know it is different, if so, use that)
- Enter your router's IP (on the Network Config Page) for the gateway.
- Enter 8.8.8.8 for the first DNS and 8.8.4.4 for the second DNS.
- Click 'Apply'.
Now, shut down the router and printer, start the router, wait, then start the printer.
After this you may need to redo 'Add a Printer' using the new IP address.
Say thanks by clicking "Kudos" "thumbs up" in the post that helped you.
I am employed by HP

How to get the Host name of Unix server

Hi all,
I am need to use the Host name of application server for some purpose.
where can i see the host name of the unix server ?

SYST-HOST or SY-HOST contain the name of the application server.
You may also use the following internal call to get the actual application server
call 'C_SAPGPARAM'
     id 'NAME' field 'rdisp/myname'
     id 'VALUE' field servername.
For the IP adress
CALL FUNCTION 'DB_DBRELINFO'
    IMPORTING
      dbinfo = dbinfo.
READ TABLE kernel_version INDEX 11.
kinfostruc-ip_address = kernel_version-data.
Regards

Getting ipaddress or host name for virtual server

I want to get the ipaddress or host name for virtual server in a cluster environment. If i do
java.net.InetAddress.getLocalHost().getHostName()
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Is there any way to get the ipaddress or host name for virtual server ?

You can get the hostname by clicking on the account properties in outlook, but the port you connect to must be opened by your system admin.

How do I "scan" my LAN and find the host name of the server computer?

I need to scan my LAN to find out the IP and host name of the computer in which is waiting for client acceptance because the server side of my program is not always on the same computer. Therefore, the IP and host name of my server is not final and can be placed on any computer on my network with over 50 connected computers. How might I check to see which computer is waiting for a client?
EDIT: I need the host name only, disregard IP
Thanks!

watwatacrazy wrote:
jwenting wrote:
Peter__Lawrey wrote:
If you know the port you can try to connect to each of the machines in turn.the people getting firewall warnings about intrusion attempts would just love that, as would the network admins whose network you're clogging with traffic (imagine several hundred clients doing that all day long, let alone tens of thousands).
If they are all one the same subnet you can use the IP addresses.Which you don't necessarilly all know. Or do you propose just sweeping through all possible IP addresses in the subnet's range? That would be a sure trigger for your network admins to immediately kick you out.
This should take a few seconds at most.Until the automatic safeguards kick in and you're thrown off the net :)In that case, what would you suggest?Not to bother. The server address should be part of the application configuration, not guessed at runtime.

Changing host name of JDI server

Hi,
during installation of JDI I used ip-addresses as host names for defining the domain host, the SLD server in domain definition, the dtr server URL in track definition, the CBS server URL in track definition.
I know that one shouldn´t use ip-addresses at all but we did have some trouble with the network infrastructure (DNS-Server, ...) at the beginning and the start of the project couldn´t be delayed.
Now, for any reason, the network department gave our server a new ip-address.
I then opened the CMS configuration tool and tried to change the host names (this time not to ip-addresses because DNS-Server works properly in the meantime).
Changing domain data is no problem. But when I try to save the changes of my track(s) I get an error message that says I should contact my administrator. I am the administrator
My Questions:
How is it possible to change the host names of JDI tracks?
What is to do at client side? There are already some developers working with the dev. configurations. Is it sufficient to change the according entries in the .confdef file or do the clients have to donwload the new dev. configuration from CMS host?
Thanks in advance
Helmut

Hello Helmut,
it should be possible to change the host names for tracks. You can get more error message details in the trace file of the Engine. To do so connect to your engine with the J2EE Administration Tool and check the defaultTrace.trc File in the Log Viewer.
For more details how to find this trace information have look into the Change Management Server Problem Analysis Scenarios (Link: http://help.sap.com/saphelp_nw04/helpdata/en/81/4bce4016d28031e10000000a1550b0/frameset.htm). In the first Scenario Incorrect Initial CMS Configuration you can also find the general information how to read and find the CMS trace files.
Please open a CSN message for the component BS-CTS-CMS if can not find the reason for the error message or if it is real problem in CMS.
Best Regards, Michael

Changing the host name of the server - impact on old Urls

All,
We are in the process of moving data centre and as part of this the host names of the BW servers will be changed and pointing to the new IP address, how and what configuration at BW server level to make sure all web reports points to the new host name when the url is generated.
Thanks

looked at the note 805344 and that helped me to understand...

DHCP Client does not send host name to DHCP Server

Hello,
I installed Solaris 10 on VirtualBox and I cannot ping/ssh/telnet the virtual machine by its host name (even from the host computer) but only by it's ip.
I tried everything I could find on internet with no success (I don't want to add the hostname in every hosts file on every computer because it's not really professionnal)
I followed what said here: http://docs.oracle.com/cd/E26505_01/html/E27061/eyhuv.html#scrolltoc
Can someone has an idea of what I can do or why this does not work.
I installed a virtual Windows7 and an Ubuntu, and it worked perfectly.
Any help would be grantly appreciated.
Thank you
Here is my current configuration:
Oracle VM VirtualBox 4.3.8 (I choose "Oracle 10 10/09 and later (64 bit))
Oracle Solaris 10 1/13
Network: bridge with RealTek interface
NB: I don't have access to dhcp server on my netgear router (access is disabled by my ISP)
Files in /etc:
dhcp.e1000g0 (empty)
nodename (contains "thorgal")
nsswitch.conf has following lines:
hosts: files dns # Added by DHCP
ipnodes: files dns # Added by DHCP
networks:   files
protocols: files
rpc:        files
ethers:     files
netmasks:   files
bootparams: files
hostname.e1000g0 (contains "inet thorgal")
/etc/inet/hosts:
::1             localhost
127.0.0.1       localhost loghost
192.168.0.17    thorgal # Added by DHCP
/etc/default/dhcpagent:
REQUEST_HOSTNAME=yes
PARAM_REQUEST_LIST=1,3,6,12,15,28,43
.v6.PARAM_REQUEST_LIST=7,12,23,24,27,29
I also try "ifconfig e1000g0 dhcp release" with no success
the debugging of dhcpagent:
# pkill -x dhcpagent
# /sbin/dhcpagent -d1 -f &
1088
# ifconfig e1000g0 dhcp start
/sbin/dhcpagent: debug: insert_pif: e1000g0: sdumax 1500, hwtype 1, hwlen 6
/sbin/dhcpagent: debug: set_packet_filter: set filter 805869f (DHCP filter)
/sbin/dhcpagent: debug: get_smach_cid: getting default client-id property on e1000g0
/sbin/dhcpagent: debug: in state INIT; allowing start command on e1000g0
/sbin/dhcpagent: debug: ipc_action_start: started start (command 4) on e1000g0
/sbin/dhcpagent: debug: set_smach_state: changing from INIT to INIT_REBOOT on e1000g0
/sbin/dhcpagent: debug: dhcp_selecting: host thorgal
/sbin/dhcpagent: info: configure_v4_lease: setting IP netmask to 255.255.255.0 on e1000g0
/sbin/dhcpagent: info: configure_v4_lease: setting IP address to 192.168.0.17 on e1000g0
/sbin/dhcpagent: warning: configure_v4_lease: no IP broadcast specified for e1000g0, making best guess
/sbin/dhcpagent: info: configure_v4_lease: using broadcast address 192.168.0.255 on e1000g0
/sbin/dhcpagent: info: configure_v4_timers: e1000g0 acquired lease, expires Fri Mar 21 21:33:05 2014
/sbin/dhcpagent: info: configure_v4_timers: e1000g0 begins renewal at Fri Mar 21 09:33:05 2014
/sbin/dhcpagent: info: configure_v4_timers: e1000g0 begins rebinding at Fri Mar 21 18:33:05 2014
/sbin/dhcpagent: debug: set_smach_state: changing from INIT_REBOOT to PRE_BOUND on e1000g0
/sbin/dhcpagent: info: added default router 192.168.0.1 on e1000g0
/sbin/dhcpagent: debug: set_smach_state: changing from PRE_BOUND to BOUND on e1000g0
/sbin/dhcpagent: debug: configure_bound: bound e1000g0
/sbin/dhcpagent: debug: ipc_action_finish: finished start (command 4) on e1000g0: 0

During the Solaris installation process, you told it what the hostname was going to be and that you wanted that environment to exist with a dynamic IP address instead of a specific address that you desired.
When Solaris boots it broadcasts that hostname and waits for a DHCP server to be quasi-intelligent enough to award an IP address based upon a pre-configured list inside that DHCP server.   Hostname ABC would always get IP address 123 on subnet rst, hostname DEF would always get IP address 456 on subnet xyz, and so on and so on.
That's the fundamental process for proper (and thus secure) DHCP.
All your other environments (Windows, Debian, Ubuntu) are what might be thought of as "hacked for convenience" to get around that sort of network configuration. They take the lazy way to exist. That partial networking setup is good enough for a home network but would be miserably insecure in a corporate environment. Those choices are operating environments that are nice for end-user desktops but aren't Enterprise Class.
My suggestion?
Review the IP address range in your Netgear router's setup.
It is likely something like 192.169.0.1 through 192.168.0.50 and can be customized.
You probably don't have 50 devices on your network and probably will never have 50 simultaneous devices on your network.
... just do a reconfigure reboot and set your Solaris to use a static IP of 192.068.0.45
Then reboot and I predict your issue that prompted this forum thread will be gone.
That's how I've done it at home for many years, even when installing Solaris to bare metal (no virtualization).

Host name changed on server after router reboot?

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