ICMP Host Unreachable from gateway localhost (127.0.0.1)

I had a functional zone. But we had an outage and for some reason one of my zones is unreachable. Looks like the problem is that the default route has changed. How can I add a default route to a zone?
Thanks
Manish
--- global zone ---
-bash-3.00# zoneadm list -iv
ID NAME STATUS PATH BRAND IP
0 global running / native shared
2 www running /export/zones/www native shared
4 java running /export/zones/java native shared
--- zone java ---
-bash-3.00# ping 131.247.16.130
ICMP Host Unreachable from gateway localhost (127.0.0.1)
for icmp from localhost (127.0.0.1) to 131.247.16.130
ICMP Host Unreachable from gateway localhost (127.0.0.1)
for icmp from localhost (127.0.0.1) to 131.247.16.130
ICMP Host Unreachable from gateway localhost (127.0.0.1)
for icmp from localhost (127.0.0.1) to 131.247.16.130
-bash-3.00# ifconfig -a
lo0:1: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
bge0:3: flags=4001000842<BROADCAST,RUNNING,MULTICAST,IPv4,DUPLICATE> mtu 1500 index 2
inet 131.247.16.149 netmask ffffff80 broadcast 131.247.16.255
-bash-3.00# netstat -rn
Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
127.0.0.1 127.0.0.1 UH 4 61 lo0:1
-bash-3.00# route add default 131.247.16.254
add net default: gateway 131.247.16.254: insufficient privileges
--- zone www ---
-bash-3.00# netstat -rn
Routing Table: IPv4
Destination Gateway Flags Ref Use Interface
default 131.247.16.254 UG 1 47
131.247.16.128 131.247.16.131 U 1 13 bge0:2
224.0.0.0 131.247.16.131 U 1 0 bge0:2
127.0.0.1 127.0.0.1 UH 4 108 lo0:2

ifconfig -a will show when you have a duplicated IP address.
It appears along with the text values for the interface flags ie
host-u010|global$ ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index
1
inet 127.0.0.1 netmask ff000000
bge0: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> m
tu 1500 index 2
inet 10.236.93.156 netmask ffffffc0 broadcast 192.168.93.191
groupname data
host-u010|global$
You would see DUPLICATE or DUPLICATED in that field, and the flags would be different. Sorry, I don't have a duplicate IP situation going on right now, but my memory says it looked something like this:
host-u010|global$ ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index
1
inet 127.0.0.1 netmask ff000000
bge0: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER,DUPLICATE> m
tu 1500 index 2
inet 10.236.93.156 netmask ffffffc0 broadcast 192.168.93.191
groupname data
host-u010|global$
Cheers,

Similar Messages

New Install - ICMP Host Unreachable from gateway

Hi team,
I'm configuring a new solaris x86 box for the first time in a long time and I'm running into a problem that has me stumped.
I just installed Solaris 10 v7 on a P4 Dell box with an intel pro1000 adapter loaded.
Installed using ZFS and install went well. I set a static IP of 192.168.1.70 on a proper 192.168.1.x lan.
After install, everything seems to work fine but cannot ping a FQDN such as www.google.com, etc.
at first, I tried to join a local domain - maxximgroup.com and my computer name is set to sunzilla.
Here's my network config files;
sunzilla is set up with static IP = 192.168.1.70
# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
e1000g0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 192.168.1.70 netmask ffffff00 broadcast 192.168.1.255
ether 0:1b:21:27:56:2c
lo0: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu 8252 index 1
inet6 ::1/128
e1000g0: flags=2004841<UP,RUNNING,MULTICAST,DHCP,IPv6> mtu 1500 index 2
inet6 fe80::21b:21ff:fe27:562c/10
ether 0:1b:21:27:56:2c
And /etc/hosts shows host name sunzilla associated w/ 192.168.1.70...
# cat /etc/hosts
# Internet host table
::1 localhost
127.0.0.1 localhost
192.168.1.70 sunzilla loghost
And my resolv.conf file shows my internal DNS routers as well as a 3rd I added (4.2.2.2) just in case...
# cat /etc/resolv.conf
domain maxximgroup.com
nameserver 192.168.1.20
nameserver 192.168.1.22
nameserver 4.2.2.2
search maxximgroup.com
I noticed the /etc/defaultrouter file was MISSING... so I created one pointing to my router...
# cat /etc/defaultrouter
192.168.1.1
And finally, I checked the /etc/nsswitch.conf file and it does indeed show hosts & ipnodes --> files & dns ...
# cat /etc/nsswitch.conf
# Copyright 2006 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
# /etc/nsswitch.dns:
# An example file that could be copied over to /etc/nsswitch.conf; it uses
# DNS for hosts lookups, otherwise it does not use any other naming service.
# "hosts:" and "services:" in this file are used only if the
# /etc/netconfig file has a "-" for nametoaddr_libs of "inet" transports.
# DNS service expects that an instance of svc:/network/dns/client be
# enabled and online.
passwd: files
group: files
# You must also set up the /etc/resolv.conf file for DNS name
# server lookup. See resolv.conf(4).
hosts: files dns
# Note that IPv4 addresses are searched for in all of the ipnodes databases
# before searching the hosts databases.
ipnodes: files dns
networks: files
protocols: files
rpc: files
ethers: files
netmasks: files
bootparams: files
publickey: files
# At present there isn't a 'files' backend for netgroup; the system will
# figure it out pretty quickly, and won't use netgroups at all.
netgroup: files
automount: files
aliases: files
services: files
printers: user files
auth_attr: files
prof_attr: files
project: files
tnrhtp: files
tnrhdb: files
I can ping local IP addresses ...
# ping 192.168.1.1
192.168.1.1 is alive
But not external addresses ...
# ping 67.15.211.8
ICMP Host Unreachable from gateway sunzilla (192.168.1.70)
for icmp from sunzilla (192.168.1.70) to ns1.siteground168.com (67.15.211.8)
ICMP Host Unreachable from gateway sunzilla (192.168.1.70)
for icmp from sunzilla (192.168.1.70) to ns1.siteground168.com (67.15.211.8)
ICMP Host Unreachable from gateway sunzilla (192.168.1.70)
for icmp from sunzilla (192.168.1.70) to ns1.siteground168.com (67.15.211.8)
ICMP Host Unreachable from gateway sunzilla (192.168.1.70)
for icmp from sunzilla (192.168.1.70) to ns1.siteground168.com (67.15.211.8)
^C#
and naturally, I can ping a FQDN either (confirmed to be pingable on a computer on the same lan) ...
# ping mycloud.local
ping: unknown host mycloud.local
Can anyone provide some guidance pls?

Thanks Robert. You were absolutely on the right track. It turns out that in my "rush" to get my new ZFS "toy" up and running, during the install, I gave Solaris a static address but told it to automatically find the gateway. Oops! When solaris 10 installed, it correctly decided that since it had a static IP, it should assign the gateway as itself! So, naturally, when I ran netstat -m, It showed my gateway as myself! 192.168.1.70 sunzilla.
I'm used to running Solaris on a Sparc platform and I'm a bit uncomfortable with reboots and I figured there would surely be a network restart command somewhere. After finding out that things have now changed in Solaris 10 quite a bit from Solaris 8, I just decided to init 6.
After the system came up, everything was happy : -)
So again, thanks to Robert for helping save the day!

Ping return a lot of "ICMP Port Unreachable from gateway"

hi all,
continues getting many "ICMP Port unreachable" messages while i ping a host that is within same subnet. both servers are running solaris 10 U6. is there any wrong configuration of IPMP ?
PING rac-dbs-a2: 1024 data bytes
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=0. time=0.830 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=1. time=0.608 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=2. time=0.547 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=3. time=0.611 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=4. time=0.543 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=5. time=0.616 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=6. time=0.663 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=7. time=0.596 ms
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=8. time=0.672 ms ICMP Port Unreachable from gateway rac-dbs-a2 (10.1.3.27) for udp from rac-dbs-c2 (10.1.3.36) to rac-dbs-a2 (10.1.3.27) port
37833
1032 bytes from rac-dbs-a2 (10.1.3.27): icmp_seq=9. time=0.582 ms
----rac-dbs-a2 PING Statistics----
10 packets transmitted, 10 packets received, 0% packet loss round-trip (ms) min/avg/max/stddev = 0.543/0.6268/0.830/0.0828
ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu
8232 index 1
inet 127.0.0.1 netmask ff000000
bge0: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 2
inet 192.168.1.27 netmask ffffff00 broadcast 192.168.1.255
groupname internal-multipath
bge0:1:
flags=201040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,CoS> mtu 1500 index 2
inet 192.168.1.37 netmask ffffff00 broadcast 192.168.1.255
bge1: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 3
inet 172.22.100.27 netmask ffffff00 broadcast 172.22.100.255
groupname smtm-multipath
bge2: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 4
inet 10.1.4.27 netmask ffffff00 broadcast 10.1.4.255
groupname crf-multipath
bge2:1: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 4
inet 0.0.0.0 netmask ff000000 broadcast 0.255.255.255
bge3: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 5
inet 10.1.3.27 netmask ffffff00 broadcast 10.1.3.255
groupname rac-multipath
bge3:1: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 5
inet 0.0.0.0 netmask ff000000 broadcast 0.255.255.255
ce0: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 6
inet 0.0.0.0 netmask ff000000 broadcast 0.255.255.255
groupname internal-multipath
ce1: flags=201000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,CoS> mtu 1500 index 7
inet 0.0.0.0 netmask ff000000 broadcast 0.255.255.255
groupname smtm-multipath
ce2:
flags=249000842<BROADCAST,RUNNING,MULTICAST,IPv4,NOFAILOVER,INACTIVE,CoS
mtu 0 index 8inet 0.0.0.0 netmask 0
groupname crf-multipath
ce3:
flags=249000842<BROADCAST,RUNNING,MULTICAST,IPv4,NOFAILOVER,INACTIVE,CoS
mtu 0 index 9inet 0.0.0.0 netmask 0
groupname rac-multipath
Edited by: hello78 on May 11, 2009 9:02 PM

This isn't a Java question. Try the Solaris forum.

Lenovo W530/W540 Getting Destination host Unreachable from our Firewall

Hey Everyone!
I'm having some bizarre issues with all of my Lenovo W530/W540's. I'm not sure when the issue started, the first time it was reported to me was around March, and it has been persistant since the issue was discovered. The issue is that, quite frequently, our Lenovo W530/W540's will get Destiantion Host Unreachable if I run a continuous ping (ping -t ...) to anything outside our firewall.
I have run a ping to things inside our firewall (other computers/servers, etc.) and they will return good ping until the cows come home.
However, if I try to ping anything outside our firewall (google.com, google DNS 8.8.8.8, yahoo.com, etc.) about every 30 seconds (every 30-35 returns) it starts returning Destitnation Host Unreachable from our Firewall. This will last for around 10-25 returns, and then traffic goes back to normal.
We are a majority Apple Shop, and when I attempt to ping from any Apple on the network, it get fine returns consistently. I also tried pinging from the few non-Lenovo Windows Machines we have as well (my personal machine which is self-built Windows rig, a couple of windows test machines, and a Windows 2008 Server we have) and they also have consistently good returns as well.
It is ONLY the Lenovo's that have this problem. To compound things, they have no issue when they are connected to a different network other than the company network. This ONLY happens when they try to interact with traffic going THROUGH our Firewall on our company network. It happens regardless of whether they hardwired or wireless. Also, during the Destination Host Unreachable moments, Windows does not detect a disruption, it keeps registering good connection. I do not know how often Windows checks for connection, but these Destination Host Unreachable moments are so quick, I'm fairly certain that Windows can't even detect them.
Our Firewall is a Linux CentOS server that is running Shorewall Firewall Software. The Destination Host Unreachable notice is coming from our Firewall directly, not from our ISP, so for some reason, the Lenovo is having a problem talking to our FW.
We currently only have 3 of these machines in circulation, but its having a pretty big impact on those with the machines, as going to a website is even a chore, as they often get "Page Not Found" and other errors when they try to load a website.
I'm a bit stumped, I've never seen a machine act this way where it only has problems on a particular network; usually its a global issue it has with everything. Any and all help would be appreciated.
Thanks!
-Chris

DNS is set to be automatic, though I did try setting a permenent DNS server in the IPv4 settings to our local DNS server AND Google DNS, and the issue still occurred.
The 2 Conflicting firewalls could be it, so I tested that. I logged into the Local Administrator account on the machine so I could temporarily disable the firewall. I disabled it, pinged out, and I still get Destination host unreachable, though weirdly, it seems to happen less than when on the other account (only about every 50-60 pings do I get Destination host Unreachable).

Certificate chain received from localhost 127.0.0.1 failed hostname verification check.

Hello friends. The dns name of our server recently changed. Since that time,
nothing except the administration node will start up. Server logs reveal the
following information:
Certificate chain received from localhost - 127.0.0.1 failed hostname verification
check. Certificate contained COTHUBT but check expected localhost>
There is one trusted certificate that was added to the cacerts keystore. Does
it need to be removed and re added? Any other insight would be appreciated.

"brain" <[email protected]> wrote:
Try this if you're running version 8
In the admin node gui.
Click on machines
Click on the NodeManager tab for the machine that you are interested in.
Change hostname in listen address.
Bounce the app server
>
Hello friends. The dns name of our server recently changed. Since that
time,
nothing except the administration node will start up. Server logs reveal
the
following information:
Certificate chain received from localhost - 127.0.0.1 failed hostname
verification
check. Certificate contained COTHUBT but check expected localhost>
There is one trusted certificate that was added to the cacerts keystore.
Does
it need to be removed and re added? Any other insight would be appreciated.

From Exchange 5.5, I have problems sending email to iPlanet Messaging Server 5.1 with subdomain. Error result = The recipient was unavailable to take delivery of the message (Host unreachable)

I'd start with the basics, can you ping the iMS machine? Can you telnet to port 25 on the machine? Do these steps from the MSX server.
If those things work, which I suspect they will not based on the text "Host unreachable" in your question then I would put master_debug slave_debug on the channel which the MSX system is arriving, either going to be tcp_local or tcp_intranet. Then look at the resulting log file on the iMS system.
Hope this helps,
Chad

JTAPI + UDP = ICMP Port Unreachable

Hi,
We're writing an IVR application which register itself as a CTI Route Point. This CTI RP has one line, 2000, which receive the external call (PSTN) from a voice gateway. A customer calls 0800 number, then flows thru PSTN->E1->Gateway->CallManager (2000)->CTI RP.
JTAPI triggers an incoming call event (TermConnRingingEv), I answer this call (terminalConnection.answer()), I receive a TermEv event (CiscoRTPOutputStartedEv), get remote address and port by rtpOutStarted.getRTPOutputProperties() (getRemoteAddress and getRemotePort properties) and start sending RTP audio (CiscoRTPPayload.G711ULAW64K, 160).
Here begins my problems. Testing this scenario with internal calls only, it was 100% perfect! But using external calls (E1->gateway), all the time getRemoteAddress answers the same IP Address (of course, gateway address). But each time there's a different port, one for each call. Usually we have success and the audio comes to final destination: the mobile phone on PSTN; but sometimes the DatagramSocket.send(DatagramPacket) method throws exception "ICMP Port Unreachable" and the call remains active but mute.
There's no pattern for this problem, sometimes it works, sometimes doesn't.
Our CUCM version is 7.1, there's no Unity or IPCC on environment, just CallManager, Gateway and application.
StackTrace:
java.net.PortUnreachableException: ICMP Port Unreachable
at java.net.PlainDatagramSocketImpl.send(Native Method)
at java.net.DatagramSocket.send(DatagramSocket.java:612)
Thanx!

It means there is no UDP connectivity between whatever host gets the exception and whatever host that socket is connected to. Typically a firewall problem.
The addresses of 0.0.0.0 just mean that the socket is bound to all interfaces, it's not a problem.

ICMP Port Unreachable

Can someone clarify what the exception java.net.PortUnreachableException: ICMP Port Unreachable indicates (aside from the obvious)? Here is the scenario: using UDP I have a client application, a gateway application, and a server application. The client sends to the server through the gateway and vice versa. I have created 2 sockets, one between the client and the gateway and one between the gateway and the server. When I try to send from the gateway to the client the packet never makes it to the client (server side is fine). When I call sock.getLocalSocketAddress and sock.getRemoteSocketAddress both are 0.0.0.0 (the latter at least has the right port number). The gateway acts as a server for the client and as a client to the server. I tried to fix this using sock.connect on the gateway side for the client facing socket but this eventually generates the ICMP port unreachable exception on the gateway side when receiving from the client.
Thank you in advance.

It means there is no UDP connectivity between whatever host gets the exception and whatever host that socket is connected to. Typically a firewall problem.
The addresses of 0.0.0.0 just mean that the socket is bound to all interfaces, it's not a problem.

Bootstrap to localhost/127.0.0.1:7001 failed.

I'm getting this error when I try to call a bean from a servlet:
javax.naming.CommunicationException - Root exception is java.net.ConnectException: t3://localhost:7001: Bootstrap to localhost/127.0.0.1:7001 failed. It is likely that the remote side declared peer gone on this JVM
I'm running Weblogic 10.3, Tomcat and the browser all on the same host. It is suggested to check the hosts file and it seems correct to me. Is this related to a routing issue? Am I supposed to manually configure any DNS rules within Weblogic Administration Console? I couldn't find any DNS settings there.
Thanks,
Jim
Edited by: Jim Twensky on May 21, 2009 11:10 AM

Hi Jim,
Did you resolve this issue? Because I have almost the sane issue!
thx
Pouyan

Message from Gateway when sending on arch-general list with Mutt

Hello,
a second issue with Mutt. This only happens when I send or reply ( <L>) to arch general list. I do not know for other arch lists, as I didn't posted, but I do not have this issue with other lists or private mail.
When I send the mail, I receive a mail
FROM : Gateway
Subject : NDN:
Body :
Sorry. Your message could not be delivered to:
Kingeryj,FirstClass (The name was not found at the remote site. Check that the name has been entered correctly).
This is a little annoying. My first thought was this message came because of a list member wrong address. But wrong, as I am the only one with this message.
Maybe some headers issue? Here is my config about headers:
ignore * #ignore all headers
unignore from to cc date subject reply-to
hdr_order from subject date to cc reply-to
Nothing particular.
When I reply to list with <L>, here are my headers:
FROM : Arno gaboury <[email protected]>
To: [email protected]
CC:
Subject : Re : [arch-general] blah blah blah
In-reply-To <some numbers letters @email adress>
Host: Magnolia on Archlinux <------ My box
I do not see anything suspicious.
I use a gmail account with offlineimap + msmtp (my msmtprc is very basic).
Any help is appreciated.
Thank you

I think almost every dev is on arch-general, so that is the place to contact the group in general. Specific points can probably be emailed to the dev involved, if one is identifiable and if the bug tracker is not a better place (bug reports to my email get ignored).
I think the whole problem here is that there is really no dev in charge of that package. So your emails were probably seen then skipped over by all devs thinking not my problem... (I know that is true for me). Then Andrea noticed an "orphan" package that needed updated and went ahead with it without connecting it to your previous emails, which is unfortunate.
Now our maintainer backend is fixed, hopefully we can get all the orphan packages adopted out, or at least know if we need to bring on new people to maintain them. That way, there should always be someone who information about specific packages should be sent to.

Host Unreachable intermittently within a Windows Network Load Balancing Cluster

Hi,
We have 2 Windows 2008 R2 servers running multiple IIS web sites and load balanced across Windows Network Load Balancer in unicast mode. Although there are two interfaces in each server, only 1 interface in each server participates in load balancing and
other interface is used for a different backup LAN. The problem I am going to mention was not seen within the NLB for almost 1 year.
I have noticed intermittent "host unreachable" detected from NLB in each host from time to time since 3 weeks ago. After servers are rebooted, both hosts can be reached and can be detected from NLB manager. However it becomes unreachable in both
servers within minutes and then becomes reachable again after several minutes. This behavior is noticed in the load balancer and pings do not work between the two hosts when the issue occurs. I did a packet capture to see what was going on with ARP message
when the issue occurs. ARP entry goes missing in each server when the problem occurs and no ARP replies are returned from each server. But ARP requests are dispatched from both servers when the issue occurs. ARP replies come back after sometime after which
hosts become reachable again.
I tried to create a permanent static ARP entry (By copying the MAC address from ARP table when the two hosts are reachable) in each host but that hasn't solved the issue either. It seems like the individual MAC address generated by each host is a virtual
one and it doesn't seem to respond when the problem occurs.
However load balancing and web sites are fully functional without any issues even while "host unreachability" issue is detected.
Appreciate if someone could help me to dig the real problem out.
Thank you.

Hi,
Did you do some change of your network or the NLB firewall settings recently?
If you are using the NLB cluster in Hyper-V guest vm you need to enable the spoofing of MAC address.
The related article:
Cannot access the virtual or dedicated IP address of an NLB node (Guest) running in Unicast Mode on Windows Server 2008 R2 Hyper-V
http://blogs.technet.com/b/networking/archive/2010/02/12/cannot-access-the-virtual-or-dedicated-ip-address-of-an-nlb-node-guest-running-in-unicast-mode-on-windows-server-2008-r2-hyper-v.aspx
More information:
Selecting the Unicast or Multicast Method of Distributing Incoming Requests
http://technet.microsoft.com/en-us/library/cc782694(v=ws.10).aspx
Single network adapter
http://technet.microsoft.com/en-us/library/cc776178(v=ws.10).aspx
Hope this helps.
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are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Getting host name from applet

Hi All,
How can i get the local host name from applet ( Host name where the applet running) . While i tried with InetAddress i got only the loop back address 127.0.0.1. Can anyone help me out in this regard.
Thanks in advance
V.S.Saravanan

When you say you tried the InetAddress, did you try the following?
You could try creating a Socket connection back to the host/server URL from where the Applet was downloaded (you should have permission to do this). You can then get the local address of the Socket.
Something like:
String hostName = getCodeBase();
Socket s = new Socket( hostName, portNum );
InetAddress address = s.getLocalAddress();
String hostName = address.getHostName();
Eric

HOST UNREACHABLE - two network cards

We have two ethernet cards. The first has a static
IP address. This is the card that is used for our
internal network. The second card recieves a dynamic
IP address from a DHCP server. The second card is
used to connect our machine to the internet. When we
disable the second card we are able to make a socket
connection and connect to our database. When the
second card is enabled the socket connection fails and
we get a HOST UNREACHABLE ERROR.
What must be configured here ?
Any help would be appreciated.
null

Messy setup IMO, but anyway....
Your faulty resolv.conf is the reason you can't ping google. Edit it manually as required, and then use the -R flag in /etc/conf.d/dhcpcd to prevent it being overwritten. DHCP on both interfaces will probably cause routing issues as well, in which case you will need the -G flag.

NLB Host Unreachable

Hi All,
Our SharePoint 2010 environment is using Microsoft NLB to cluster its front end web servers.
Yesterday, one of our active directory domain controllers was demoted and the server rebooted, this server also acts as one of our DNS servers. When it was rebooted, our SharePoint environment became unavailable; Users were getting prompted
with an authentication box. Looking into it further there is a Host Unreachable error between the 2 load balancers. After about 20mins the domain controller was promoted again, server rebooted and everything became available again.
Can anyone shed any light on why this may have occurred. Is it simply that the load balancers lost the DNS and the ability to talk to each other. If so why did it not use the secondary DNS server configured in windows and remain alive?
Or does the issue lie with the domain controller being demoted?
Any help appreciated.
Cammie

Hi,
I am not very similar the SharePoint, but it seems is the client use the FQDN to access the SharePoint resource, but when your DC demote the DNS have some issue. Please try
to ping the NLB virtual IP to see it reachable or not.
If at any point the DNS Client service receives a negative response from a server, it removes every server on that adapter from consideration during this search. For example,
if in step 2, the first server on Alternate Adapter A gave a negative response, the DNS Client service would not send the query to any other server on the list for Alternate Adapter A.
The related KB:
DNS Processes and Interactions
http://technet.microsoft.com/en-us/library/dd197552(v=ws.10).aspx
Demoting Domain Controllers and Domains (Level 200)
http://technet.microsoft.com/en-us/library/jj574104.aspx
Hope this helps.
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Can ACE 4710 send ICMP-dest-unreachable?

Dear Community!
We have previously configured an ACE context for implementing redundant corporate DNS service and now testing a transparent ACE context and HA configuration.One virtual-IP is configured for UDP/53, listening for DNS requests. Behind the VIP, there are 3 DNS server. The next step of our testing process, we have shut down all real-server instance behind the virtual-IP while inspecting DNS clients behaviour. Besides the DNS clients requesting the virtual-IP DNS service need ICMP-destination-unreachable packet to switchover the secondary DNS server.
Can ACE 4710 send ICMP-dest-unreachable?
Thanks in advance!
Regards,
Belabacsi
from Hungary

Unfortunately the 4710 does not send icmp unreachable when a vserver is down.
If you have backup dns service, you can configure it on ace itself.
Gilles.

ICMP Host Unreachable from gateway localhost (127.0.0.1)

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