Local Host certificate expired, what do I do next?

I just started to recieve these emails, and I have read on here that I can ignore it, and all will be fine. Is this true?
System Administrator ✆ [email protected]
The following certificate is about to expire on your server, macserver.local: Name: localhost
Expiration Date: 2012-07-13 22:36:11 -0700
Thanks

I would make a new one and go through those services one by one and select the newly created certificate instead of the new one. Most of those services don't use certifcates. I can confirm that besides mail, Open Directory does. See my screenshot below.

Similar Messages

I have a macbook pro. i have a photosmart 7510. we just bought a new windows tower and the printer works wireless for us, but now the mac does not print anymore wirelessly. i keep getting a message Network host 'HPE93F2A.local.' is busy. what can i do to

I have a macbook pro. i have a photosmart 7510. we just bought a new windows tower and the printer works wireless for us, but now the mac does not print anymore wirelessly. i keep getting a message Network host 'HPE93F2A.local.' is busy. what can i do to

it is a windows 8

ISE - What happens when the on-boarded certificate expires?

I'm trying to design a good BYOD deployment model but have a few questions that need direct answers. I have down how to go about on-boarding and getting a certificate on a device, the ISE provides great flow for this to happen in many ways. My questions come from a design perspective before and after the BYOD deployment is completed.
1. Figuring out a method to validate the device is a Corporate asset or a BYOD asset.
     (I don't want to install a certificate on just any device, or perhaps I do but I need to give permissions to all resources if its a Corporate Device, and more resitrictions if it's BYOD, so how do I figure this out during the provisioning phase?)
     a. Use MDM (May not have one, or if you do we are still waiting on ISE 1.2 for that integration)
     b. Build a Group for provisioning admins, if user PEAP-MSCHAPv2 account is from this group install a certificate. (issue here is that the end user looses administration of the device in the my device portal as the device is now registered to the provisioning admin)
     c. Pre-populate MAC into ISE as all Corporate devices should be provisioned by I.T. before they go to the end user (I think this is good but can see push back from customers as they don't want to add more time to the process)
     d. Certs on any IOS or Android device, provide access based on user group and do not worry if device is Company asset or not (I believe that this is the easiest solution and seems to be what I find in the guides)
     e. Other options I have not thought about, would love input from the crowd
2. What happens to the device once the Certificate expires?
     (I don't know the answer to this, my thought would be the user or device will fail during the authentication policy and this creates a mess)
     a. Tell the user to delete the profile so they can start all over again (creates help desk calls and frustrated users)
     b. Use MDM for Cert management (may not have one)
     c. Perhaps the client uses SCEP to renew based on the cert template renew policy and there are no issues (this is me wishing)
Would appreciate some feed back and would like to know if anyone has run into these issues.

Neno,
Sorry but I don't have any other info on using a public CA, Cisco says to use internal CA's for PKI. I think the best practice in 1.2 comes out will be to use one interface for Web Management and a different interface for Radius, profiling, posture, and on boarding. This way you can use your private CA for EAP and a public CA for web traffic. Have you tried a public CA bound to management and a private CA for EAP yet?
I did do a session on EAP-TEAP, they explained how it will work and also discussed EAP-FASTv2. EAP-FASTv2 is available now but you must use anyconnect as your supplicant. Microsoft and all other vendors will have EAP-TEAP native once it is fully released and comissioned as it will be the new gold standard for EAP. It will support TLS, MD5, and CHAPv2. If you are interested I have the PDF of the presentation I attended that shows the flow of how EAP-TEAP will work. This is much better than wasMachineAuthenticated and machine auth caching, which has many down falls.
I currently do machine and user auth I just don't require them. If Machine auth then allow machine on vlan-x with access to AD, DNS, and blah blah. Then a seperate rule to say user auth gets more access, although I require EAP-TLS for both and if you think about it you are accomplishing the same thing if your PKI is setup correctly. Make it so users and machines can only auto enroll, that way you know the only way they got their cert was from GPO policy. I won't go into anymore detail, but there is lots you can do.

What happens if the certificate expire on a ISE PSN

What happens if a PSN certificate expire? Does all other nodes in the cluster looses the communication channel to that PSN node?
What is the procedure to install a new certificate on a PSN node with the expired certificate?
Does the PSN node still handle client RADIUS requests that does not depend on the PSN cerfificate?
Tanks!

You definitely want to renew the certs before they expire. Otherwise the effects can be very devastating to your ISE environment depending on what the certificates are used for :) Below are a couple of links that you can use to obtain more info on both of your questions:
ISE version 1.2:
http://www.cisco.com/c/en/us/support/docs/security/identity-services-engine/116977-technote-ise-cert-00.html
ISE Version 1.3:
http://www.cisco.com/c/en/us/td/docs/security/ise/1-3/admin_guide/b_ise_admin_guide_13/b_ise_admin_guide_sample_chapter_01000.html#concept_D7826198A3304303AD046DB981DA4FE6
Thank you for rating helpful posts!

What happens if my distribution certificate expires?

What happens if the old certificate expires? Will users be available do download and update my app with old certificate, or will Apple remove my apps until the new certificate is provided?
Do i Need to resubmit my apps on store before it expire ?
Thank you

Apple resigns apps with non-expiring credentials when the app is added to the store.
You don't have to worry about apps already in the store.

What happens to Apps when the Distribution certificate expires?

Our distribution certificate expires in mid March. Do I have to re-build all the apps that are on the App Store with the new certificate or will they continue to install without issues?
My gut feel is that Apple would not expect developers to re-submit all their apps just because the certificate has expired but like a confirmation from someone since I am sure many have crossed this bridge.
Thanks in advance.
-TRS

+>I assume that any new submissions will have to have to be built with a profile which includes a valid certificate.+
Of course....just follow the money
It is a solid process, but of course Apple, like any business that operates around time-based/recurring fees, wants to get the 'subscriber' to re-up sooner than later.
The countdown in the dev center, etc. we see about our 'expiration' date is meant not only as a friendly reminder concerning whatever risk, it is a prod to get whatever monies out of our pockets and into theirs...sooner than later

Computer certificates expiring within 6 weeks disappearing from machines when computer certificates from two certificate authorities are present

2008 R2 single tier enterprise certificate authority with root certificate expiring within 6 weeks, also domain controller
2012 R2 single tier enterprise certificate authority with root certificate valid for more than the next year, also domain controller
Both servers are approved as certificate authorities for the domain and can issue computer certificates using the computer certificate template. There is a group policy object applied to all workstations that contains an automatic computer certificate request,
but the actual "certificate services client auto-enrollment" element is "not configured". This process seems to work like a round robin in that computers with no certificate can wind up with a certificate from either certificate
authority. I need all PCs to have both certs for a DirectAccess migration. I have successfully used SCCM to ensure all PCs have both certificates using compliance rules and a script using certreq.exe.
A machine will keep both certs until the older computer certificate moves into the 6 week window of expiration, then it gets purged. I have observed this behavior for over a month, even when the CA root certificate wasn't so close to expiring. I
can't figure out what setting is triggering the purge, but need to stop it. Maybe it's coming from default settings in local machine policy for an element that should be disabled in the group policy object supplying the automatic certificate request?
The worst part of this issue is that I can't recreate the purging behavior with gpupdates or restarts on my test machines.

You should not be using Automatic Certificate Request Service (ACRS) for this - it was designed for Windows 2000 and is generally deprecated. Secondly, the reason it is acting like a round-robin as you describe it, is that templates are generally configured
to attempt to renew within 6 weeks of their expiration. Since the 2008 R2 CA is expiring within 6 weeks, it cant issue anything longer than its own remaining lifetime. It is a well known issue that issuing a certificate within the renewal period will cause
problems.
What you should do it use AutoEnrollment and issue a certificate with a very small renewal period (1 week perhaps) by creating a custom V2 template and issuing that from your 2008 R2 CA. Then on the 2012 R2 CA you will need ANOTHER template, as the computer
will only enroll for a certificate from each template. This one can be configured with a normal lifetime and renewal period.
Mark B. Cooper, President and Founder of PKI Solutions Inc., former Microsoft Senior Engineer and subject matter expert for Microsoft Active Directory Certificate Services (ADCS). Known as “The PKI Guy” at Microsoft for 10 years. Connect with Mark at http://www.pkisolutions.com

Cisco ASA 5505 Cannot ping local traffic and local hosts cannot get out

I have, what I believe to be, a simple issue - I must be missing something.
Site to Site VPN with Cisco ASA's. VPN is up, and remote hosts can ping the inside int of ASA (10.51.253.209).
There is a PC (10.51.253.210) plugged into e0/1.
I know the PC is configured correctly with Windows firewall tuned off.
The PC cannot get to the ouside world, and the ASA cannot ping 10.51.253.210.
I have seen this before, and I deleted VLAN 1, recreated it, and I could ping the local host without issue.
Basically, the VPN is up and running but PC 10.51.253.210 cannot get out.
Any ideas? Sanitized Config is below. Thanks !
ASA Version 7.2(4)
hostname *****
domain-name *****
enable password N7FecZuSHJlVZC2P encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
interface Vlan1
nameif Inside
security-level 100
ip address 10.51.253.209 255.255.255.248
interface Vlan2
nameif Outside
security-level 0
ip address ***** 255.255.255.248
interface Ethernet0/0
switchport access vlan 2
interface Ethernet0/1
interface Ethernet0/2
shutdown
interface Ethernet0/3
shutdown
interface Ethernet0/4
shutdown
interface Ethernet0/5
shutdown
interface Ethernet0/6
shutdown
interface Ethernet0/7
shutdown
ftp mode passive
dns server-group DefaultDNS
domain-name *****
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 10.1.7.0 255.255.255.0
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.1.10.250
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.1.3.200
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.1.3.9
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.14
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.15
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.16
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 10.1.9.0 255.255.255.0
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 10.10.9.0 255.255.255.0
access-list No_NAT extended permit ip 10.51.253.208 255.255.255.248 ***** 255.255.255.240
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 10.1.7.0 255.255.255.0
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.1.10.250
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.1.3.200
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.1.3.9
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.14
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.15
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 host 10.10.10.16
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 10.1.9.0 255.255.255.0
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 10.10.9.0 255.255.255.0
access-list Outside_VPN extended permit ip 10.51.253.208 255.255.255.248 ***** 255.255.255.240
pager lines 24
mtu Outside 1500
mtu Inside
icmp unreachable rate-limit 1 burst-size 1
icmp permit any Outside
no asdm history enable
arp timeout 14400
global (Outside) 1 interface
nat (Inside) 0 access-list No_NAT
route Outside 0.0.0.0 0.0.0.0 ***** 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
aaa authentication enable console LOCAL
aaa authentication serial console LOCAL
aaa authentication ssh console LOCAL
http server enable
no snmp-server location
no snmp-server contact
snmp-server community *****
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec transform-set DPS_Set esp-3des esp-md5-hmac
crypto map DPS_Map 10 match address Outside_VPN
crypto map DPS_Map 10 set peer *****
crypto map DPS_Map 10 set transform-set *****
crypto map DPS_Map interface Outside
crypto isakmp enable Outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 28800
crypto isakmp policy 65535
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
telnet timeout 5
ssh 0.0.0.0 0.0.0.0 Outside
ssh timeout 60
console timeout 0
management-access Inside
username test password P4ttSyrm33SV8TYp encrypted
tunnel-group ***** type ipsec-l2l
tunnel-group ***** ipsec-attributes
pre-shared-key *
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
service-policy global_policy global
prompt hostname context
Cryptochecksum:8d0adca63eab6c6c738cc4ab432f609d
: end
1500

Hi Martin,
Which way you are trying. Sending traffic via site to site is not working or traffic which you generate to outside world is not working?
But you say ASA connected interface to PC itself is not pinging that is strange. But try setting up the specific rules for the outgoing connection and check. Instead of not having any ACL.
If it is outside world the you may need to check on the NAT rules which is not correct.
If it is site to site then you may need to check few other things.
Please do rate for the helpful posts.
By
Karthik

How do I change an IP address of SQL Server which is locally hosted and is not on cluster?

Hi All,
How do I change an IP address of SQL Server which is locally hosted and is not on cluster?
I am asking about IP for SQL Server, is there a way we can assign a different IP to SQL Server other than the server's(host) IP address? like the same what we do in a clustered env.
aa

Full explanation can seen here:
SQL Server: Configure Listening IP, Port, and Named pipe
http://ariely.info/Blog/tabid/83/EntryId/151/SQL-Server-Configure-Listening-IP-Port-and-Named-pipe.aspx
[Personal Site] [Blog] [Facebook]

Event ID 1012 - There was an error while attempting to read the local hosts file

When I start my Computer after it has been turned off overnight (switched off at the Power supply) I get a Blue screen and have to reboot the PC. in the Event log it has this error: Event ID 1012 - DNS client events - There was an error while attempting
to read the local hosts file.
Once the PC has booted evrything is O.K. I can restart the PC with no problems, it only seems to happen if the PC has been switched off for a while.
I am connected to the net via an Netgear dg834v4 Modem/Router
Windows 7 Ultimate
Intel Q8200 CPU
2 x 360 Gb HDD
ATI 4680 !Gb Video Card
Digital HDA X-Mystique 7.1 Sound Card
Aver media 777 TV Tuner card.
Thank you
jeepers01
After further Investigation it seems that this error is Not responsible for my Blue screening......I started my PC after leaving it off all night, and it started normally, but i still have this error in the Event Log - System.....I have searched the Technet
forums (and there is a lot of ID 1012 errors) but non relating to my problem....If anyone knows what is causing this error and how to fix it, i'd be Grateful....although it does not seem to affect the PC in any way that i can see.
thanks
jeepers01

Since Windows system uses separated user mode and kernel mode memory space, stop errors are always caused by kernel portion components, such as a third-party device drivers, backup software or anti-virus services (buggy services).
The system goes to a BSOD because there is some exceptions happened in the kernel (either the device driver errors or the service errors), and Windows implements this mechanism: When it detects some errors occur in the kernel, it will kill the box in case
some more severe damage happens. Then we get a blue screen or the system reboots (it depends on what the system settings are).
To troubleshoot this kind of kernel crash issue, we need to debug the crashed system dump. Unfortunately, debugging is beyond what we can do in the forum. A suggestion would be to contact Microsoft Customer Service and Support (CSS) via telephone so that
a dedicated Support Professional can assist with your request. Please be advised that contacting phone support will be a charged call.
To obtain the phone numbers for specific technology request please take a look at the web site listed below:
Microsoft - Help and Support
If you are outside the US please see
Microsoft Worldwide Home for regional support phone numbers.
Meantime we can try some available steps as a general troubleshoot.
1. Please remove the antivirus and run the system with a period. If the issue does not occur, mainly focus on antivirus settings and compatibility.
2. Disable Automatic Restart and see detail information on the blue screen.
1).Click Start, in the Start Search box enter sysdm.cpl.
2).Click the tab Advanced. Under Startup and Recovery, click the Settings button.
3). Uncheck “Automatically restart”.
4). On the drop-down menu “Write debugging information”, choose “Small memory dump”.
5). Click OK.
When Blue Screen displays, you may find some useful information.
Arthur Xie - MSFT

How to run local host web application in win 7 64 bit with oracle database?

Hi all,
Hope doing well,
sir i am running my local host web application with oracle database in win 7 32 bit. it's working fine.
but when i am running the same thing in win 7 64 bit. it's showing login error.
not going to home page even i checked with this published file open in visual studio it's working fine.
how to run it correctly?
thanks in advance.

The number of times you have been asked to post sufficient details for your questions, we would expect you to have got the message by now... but clearly not.
952646 wrote:
but when i am running the same thing in win 7 64 bit. it's showing login error.What error? You haven't posted an error. There are millions of possible errors in computing and you're expecting people to guess which one.
not going to home page even i checked with this published file open in visual studio it's working fine.
how to run it correctly?No code, no database version, no details...... = NO HELP.
When are you going to learn.

HT201336 Hi I have a certificate expired and was wondering how can I update it ?

I have an apple Iphone certificate expired and I was wondering how do you renew it?

No answers, just some questions... (I'm not sure what you're asking.)
Where did the certificate originate? An Apple iPhone certificate? For what? For iOS development? For VPN? For accessing remote web services, on a server? This is the OS X Server 10.6 forum; are you working with certificates with that operating system, or with certificates on an iPhone?
If your OS X Server system has an expired certificate, you'll need to either purchase a new certificate, or generate a new self-signed certificate and load that via the Certificate Assistant and Server Admin tools.

Portal Certificate Expired with NO VA running!!!

Hi All,
I got one issue about Portal certificate expiration, for which SSO is not working b/w Portal and R3.
As working on Solaris, required to re-generate the Keystore Certificate via Visual Admin, but WHAT!!!
I am not able to run it, it says that JAVA_HOME needs to be set.
Done (Set) but still am not able to see that VA screen. Tried thru root and SIDADM (recommended) also, but couldnt... which is turning my head 360 degrees.
Well request you all to share your good experiences thru which i may be able to resolve the issue which is pending past 2 days and no proceedings since...
And i guess there is no way out to increase the validity of certificate without VA. OR is there any????
Thanks
Piyush

hi Anil,
i got,
/usr/java
we ran the command "./go" to start visual admin, which inturn shows the error as below
4/7/10 12:09 PM com.sap.engine.tools.launcher.Launcher Error : console output st
ream will not be logged into a file; there was an error opening the log file
java.io.FileNotFoundException: /usr/sap/EPD/JC01/j2ee/admin/log/console_logs/out
put.log (Permission denied)
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:179)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
        at com.sap.engine.tools.launcher.Launcher.initLogs(Launcher.java:636)
        at com.sap.engine.tools.launcher.Launcher.init(Launcher.java:198)
        at com.sap.engine.tools.launcher.Launcher.main(Launcher.java:113)
4/7/10 12:09 PM com.sap.engine.tools.launcher.Launcher Error : unable to invoke
main class com.sap.engine.services.adminadapter.gui.AdminFrameView
Exception in thread "main" com.sap.engine.tools.launcher.LauncherException
        at com.sap.engine.tools.launcher.Launcher.launch(Launcher.java:340)
        at com.sap.engine.tools.launcher.Launcher.main(Launcher.java:114)
caused by -
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.sap.engine.tools.launcher.Launcher.launch(Launcher.java:336)
        at com.sap.engine.tools.launcher.Launcher.main(Launcher.java:114)
Caused by: java.lang.InternalError: Can't connect to X11 window server using ':0
.0' as the value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:1
34)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvi
ronment.java:62)
        at java.awt.Window.init(Window.java:231)
        at java.awt.Window.<init>(Window.java:275)
        at java.awt.Frame.<init>(Frame.java:401)
        at java.awt.Frame.<init>(Frame.java:366)
        at javax.swing.SwingUtilities$1.<init>(SwingUtilities.java:1641)
        at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:16
37)
        at javax.swing.JWindow.<init>(JWindow.java:160)
        at javax.swing.JWindow.<init>(JWindow.java:112)
        at com.sap.engine.services.adminadapter.gui.AboutWindow.<init>(AboutWind
ow.java:12)
        at com.sap.engine.services.adminadapter.gui.AdminFrameView.main(AdminFra
meView.java:234)
        ... 6 more
caused by -
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at com.sap.engine.tools.launcher.Launcher.launch(Launcher.java:336)
        at com.sap.engine.tools.launcher.Launcher.main(Launcher.java:114)
Caused by: java.lang.InternalError: Can't connect to X11 window server using ':0
.0' as the value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:1
34)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvi
ronment.java:62)
        at java.awt.Window.init(Window.java:231)
        at java.awt.Window.<init>(Window.java:275)
        at java.awt.Frame.<init>(Frame.java:401)
        at java.awt.Frame.<init>(Frame.java:366)
        at javax.swing.SwingUtilities$1.<init>(SwingUtilities.java:1641)
        at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:16
37)
        at javax.swing.JWindow.<init>(JWindow.java:160)
        at javax.swing.JWindow.<init>(JWindow.java:112)
        at com.sap.engine.services.adminadapter.gui.AboutWindow.<init>(AboutWind
ow.java:12)
        at com.sap.engine.services.adminadapter.gui.AdminFrameView.main(AdminFra
meView.java:234)
        ... 6 more
Regards
Piyush

Local host name message pops up on start up

I've started getting message on start up saying "local host name is already in use, do you want to change"
this just began happening.
what does this mean and how can i fix it from poping up?
thanks

Hey R%%^Y,
Thanks for the question. It sounds like another computer on your network may have a similar local hostname. You can change your hostname in System Preferences > Sharing:
OS X Mavericks: Find your computer’s name and address
http://support.apple.com/kb/PH13790
Local hostname: Your computer’s local hostname, or local network name, is displayed on your local network so others on the network can connect to your Mac.
Your computer’s local network name is displayed beneath the computer’s name at the top of Sharing preferences.
The local network name is your computer’s name with “.local” added, and any spaces are replaced with hyphens (-). For example, if your computer’s name is My Computer, your local network name is “My-Computer.local.” Local network names are not case sensitive, so “my-computer.local” is the same as “My-Computer.local.”
Thanks,
Matt M.

Local host name already in use

I routinely get a message saying "local host name is already in use on this network. The name has ben changed to...."

Is this a home network or a workplace network?
If you open up terminal.
Go to Applications> Utilities> Terminal and type in hostname
what comes up?

Local Host certificate expired, what do I do next?

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