Sockets and ports - routing messages between machines? helpppp!

Hi,
I'm new to java and am hoping someone out there can help me, hoping this is an ok place to post this:
If all you need to create a connection is an IP address and a port number, using streams...
Can you route messages from A to B then from B to C, where A looks up C through B having a hash table which contains C's IP address and port number?
And how in the first instance does B know about A's IP address? All the examples I've seen the IP address is hard coded?
Thanks in advance!

I'm not sure what you are really trying to do... Can you explain in more concrete terms? Are you writing a chat client + server or something like that?

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L2 and L3 Routed Link between 2 COREs

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Hello Ibrahim ,
I will try to explain ,
VLANs put tag on frames to ensure packet do not leave layer 2 broadcast domain and yet will reach to all ports part of that vlan ( as per tag ) .
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! Kindly rate all helpful posts and accordingly mark correct answers to help forum !

Sockets and ports - how to route through another machine?

Hi,
I'm hoping someone out there can help me:
If all you need to create a connection is an IP address and a port number, using streams...
Can you route messages from A to B then from B to C, where A looks up C through B having a hash table which contains C's IP address and port number?
And how in the first instance does B know about A's IP address? All the examples I've seen the IP address is hard coded?
Thanks in advance!

Ok, so i mean I know this is possible, but I have some users who need to communicate with each other, sorta a message passing approach but with TCP rather than using JMS (time to do this in is v limited).
They need to talk to a middle computer, whos job it is to lookup an appropriate partner to talk to, but:
how do i go about getting the IP address in the first place so that they know who to talk to?
Before communication can take place does there have to be some agreement in which they exchange IP addresses and port numbers?

Dual Wan and port routing

Hi,
I am setting up a configuration with SA520W and 2 Wan, in load balancing. But I face a problem that I could not understand.
Traffic is HTTP, SIP and 2 servers.
Servers are for a VPN tunnel and a mail server with ActiveSync
Both services absolutely need port 443 on the external IP, and that's one of the dual wan reason.
The 2 wan are running, load balancing mode is enable and NAt routing in firewall tab as follow :
443 Enabled     WAN     LAN     ALU_OpenVPN     ALLOW always     Any         192.168.0.150     WAN1     Always
443   Enabled     WAN     LAN     ActiveSync     ALLOW always     Any         192.168.0.254     WAN2     Always
If load balanced
Port 443 is NOT routed from wan1 to 192.168.0.150
Port 443 is routed from wan2 to 192.168.0.254
If only WAN 1
Port 443 is routed from wan1 to 192.168.0.150
If only WAN 2
Port 443 is routed from wan2 to 192.168.0.254
In fact I did other testing and no port routing with WAN1 when load balancing is enable, even on port that is not used at all on Wan2.
With a FTP filezilla server, it's OK if on wan2, and it stop before logging if on a wan1 (on laod balancing, ok on both case if only one wan)
Firmware : latest 2.1.18
Any Clue ??

Hello,
I confirm, there is a strange behaviour.
Simple test :
Dual Wan configured.
A FTP server on the LAN (192.168.0.254) port 21
Firewall , ipv4 config :
WAN   to   LAN     FTP     ALLOW always     Any         192.168.0.254     WAN1
WAN   to   LAN     FTP     ALLOW always     Any         192.168.0.254     WAN2
Then some testing using a FTP client outside the LAN, connection from Internet.
Then, changing ONLY the Wan Mode :
1/ Use only single WAN port : Dedicated WAN
==> FTP connect through WAN1
2/ Use only single WAN port : Optional WAN
==>FTP connect through WAN2
3/ Load Balancing
==>FTP connect through WAN1
==>FTP DO NOT connect through WAN1
Is that a bug or do I have some strange stuff somewhere ?
I will pick up another SA520W from stock, brand new, update the firmware, configure the 2 WAN (invering the 2 provider just in case) and do the same test.

Whats socket and port ??

Hi,
iam new to sockets...
i dont know whats the difference between sockets and ports

http://java.sun.com/docs/books/tutorial/networking/sockets/definition.html

Chatserver socket and port problem

hi,all.
i write a chat server use java socket. now is more than 2000 users connect to my server. but too many user make the chat message speed slow. now my server is open one port to listen the client connection. who can tell me if i change my server to open multi port to listen the client connection will rather than open one port. or it is same effect.
please give me some advice. thanks.
my homepage is:http://www.easyfad.com

my server system resource is no problem. Have you timed the bus on your machine?
18% of memory means physical or total. If total is that 18% hitting the hard drive?
What is your actual network speed? A 100m ethernet has a theoretical speed of about 12 meg per second, in practice you will never get even close to that. A normal ftp transfer might only get 500k per second. And networks can be significantly overloaded.
What are the configuration parameters for your IP stack? It might be configured incorrectly for the type of traffic and quality of traffic that you are getting.
The above are all possible things that can affect performance. And there are probably more. Standard OS tools are NOT the best way to measure platform performance. They can often provide misleading numbers, even when one knows what the numbers really mean.
if i use multi port to create socket connection,
if it will help to increase message sending speed ? Like I said I can't see how. Something is causing a slowdown. Your NIC can only process so much traffic. If your NIC was the bottle neck and you had two NICs then that would help. But if it was me I really wouldn't try a two NIC solution until I had exhausted every other possibility. First because it is unlikely to the be bottleneck and two because setting up a 2 NIC (or more) server is not plug and go solution.

About socket and port problem

hi,all.
i write a chat server use java socket. now is more than 2000 users connect to my server. but too many user make the chat message speed slow. now my server is open one port to listen the client connection. who can tell me if i change my server to open multi port to listen the client connection will rather than open one port. or it is same effect.
please give me some advice. thanks.

Maybe your machine is not strong enough to serve that many users at a time anyway. In that case using several ports won't help.

Socket and PORT problem

I am new to socket programming. Is there a command in UNIX to see which ports are not occupied?
Since I have problem right now in my program to close the sockets, will they be closed automatically after I interrupt the program, should I close it manually from the command line?
TIA.
mmc

When you create a Socket, you can either bind to port 0 (which binds to the first available port) or to any other valid Port number. There is no Java-based method for geting the port numbers in-use or available. When your program terminates, the sockets will terminate as well, but the port may not be available for use for a few seconds. This allows for the system to be reset.

Sockets and Ports and DataInputStreams

I think this is just a basic TCP/IP networking question: When I open a socket connection to a remote ip address/port, what port am i receiving data on via my DataInputStream? Is it the same port I opened the remote connection on, 80, or what?
thanks,
Abraham

int answer = yourSocket.getLocalPort();

If I delete someone from my contacts and a text message is that message also deleted from contact?

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After mail was moved to iCloud on jan 1, my mail app emails received have 23 lines of "routing info" between the address and the message. How can I get rid of this info?

After my mail was moved to iCloud, my mail app emails received have 23 lines of "routing data between the address and the message how can Imget rid of this "data"?

Found the answer a Mail>preferances>Viewing>Show header detail. Changed it to Default.

Whats the difference between sending messages via socket and MQs?

Whats the difference between sending messages via socket and MQs?

Soph wrote:
Whats the difference between sending messages via socket and MQs?With JMS (and the like) your application uses a socket to connect to a central server called a "*Message Broker*". Over this connection it can send or receive messages.
A Message Broker is somewhat analogous to a database server. Multiple clients connect to it to exchange messages. As with a database a client first establishes a connection, then requests specific facilities like subscriptions.
It creates a strong decoupling between sender and receiver and handles stuff like allowing multiple receivers for the same message, queuing of messages for applications not currently running and so on.
(And don't worry, you can get perfectly good message brokers for free such as openMQ and activeMQ.)

Question in ACS radius ports and how test connectivity between router

hi all
im asking here about default ports used in cisco acs for radius protocol
is it 1812 and 1813 ???
or there is another ports ??
Q2-
how to test connectivity between ACS "server aaa" and the router "client aaa " ??????
Q3-
can anyone give me simple config on router for radius protocol to connect acs based on radius protocol ?
regards

The default authentictaion port is 1812 and the default accounting port is 1813.
Here's an example config-
aaa new-model
aaa group server radius ACME-RADIUS
server-private 192.168.1.5 auth-port 1812 acct-port 1813 key SeCrEtPaSsWoRd
aaa authentication login default local
aaa authentication login ACME-AAA group ACME-RADIUS local
aaa accounting send stop-record authentication failure
aaa accounting exec default start-stop group ACME-RADIUS
line vty 0 4
login authentication ACME-AAA
You can test with-
test aaa group radius server 192.168.1.5 mmessier St@nleyCup
where mmessier is your username and the password is St@nleyCup

Site-to-Site VPN between Cisco ASA 5505 (8.4) and Cisco Router (IOS 15.2)

Hi, I'm trying to create Site-to-Site VPN between Cisco ASA 5505 and Cisco Router 3945.
I've tried create configuration with and without ASA wizard, but anyway it doesn't work.
Please help me to find where is the issue.
I have two sites and would like to get access from 192.168.83.0 to 192.168.17.0
192.168.17.0 --- S1.S1.S1.S1 (IOS Router) ==================== S2.S2.S2.S2 (ASA 5505) --- 192.168.83.0
Here is my current configuration.
Thanks for your help.
IOS Configuration
version 15.2
crypto isakmp policy 1
encr aes 256
authentication pre-share
group 2
crypto isakmp key cisco address 198.0.183.225
crypto isakmp invalid-spi-recovery
crypto ipsec transform-set AES-SET esp-aes esp-sha-hmac
mode transport
crypto map static-map 1 ipsec-isakmp
set peer S2.S2.S2.S2
set transform-set AES-SET
set pfs group2
match address 100
interface GigabitEthernet0/0
ip address S1.S1.S1.S1 255.255.255.240
ip nat outside
ip virtual-reassembly in
duplex auto
speed auto
crypto map static-map
interface GigabitEthernet0/1
ip address 192.168.17.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
access-list 100 permit ip 192.168.17.0 0.0.0.255 192.168.83.0 0.0.0.255
ASA Configuration
ASA Version 8.4(3)
interface Ethernet0/0
switchport access vlan 2
interface Vlan1
nameif inside
security-level 100
ip address 192.168.83.1 255.255.255.0
interface Vlan2
nameif outside
security-level 0
ip address S2.S2.S2.S2 255.255.255.248
ftp mode passive
same-security-traffic permit intra-interface
object network inside-network
subnet 192.168.83.0 255.255.255.0
object network datacenter
host S1.S1.S1.S1
object network datacenter-network
subnet 192.168.17.0 255.255.255.0
object network NETWORK_OBJ_192.168.83.0_24
subnet 192.168.83.0 255.255.255.0
access-list outside_access_in extended permit icmp any any echo-reply
access-list outside_access_in extended deny ip any any log
access-list outside_cryptomap extended permit ip 192.168.83.0 255.255.255.0 object datacenter-network
pager lines 24
logging enable
logging asdm informational
mtu inside 1500
mtu outside 1500
ip local pool vpn_pool 192.168.83.200-192.168.83.254 mask 255.255.255.0
icmp unreachable rate-limit 1 burst-size 1
no asdm history enable
arp timeout 14400
nat (inside,outside) source dynamic inside-network interface
nat (inside,outside) source static inside-network inside-network destination static inside-network inside-network no-proxy-arp route-lookup
nat (inside,outside) source static inside-network inside-network destination static datacenter-network datacenter-network no-proxy-arp route-lookup
nat (inside,outside) source static NETWORK_OBJ_192.168.83.0_24 NETWORK_OBJ_192.168.83.0_24 destination static datacenter-network pdatacenter-network no-proxy-arp route-lookup
access-group outside_access_in in interface outside
route outside 0.0.0.0 0.0.0.0 DEFAULT_GATEWAY 1
crypto ipsec ikev1 transform-set vpn-transform-set esp-3des esp-sha-hmac
crypto ipsec ikev1 transform-set vpn-transform-set mode transport
crypto ipsec ikev1 transform-set L2L_SET esp-aes esp-sha-hmac
crypto ipsec ikev1 transform-set L2L_SET mode transport
crypto dynamic-map dyno 10 set ikev1 transform-set vpn-transform-set
crypto map vpn 1 match address outside_cryptomap
crypto map vpn 1 set pfs
crypto map vpn 1 set peer S1.S1.S1.S1
crypto map vpn 1 set ikev1 transform-set L2L_SET
crypto map vpn 20 ipsec-isakmp dynamic dyno
crypto map vpn interface outside
crypto isakmp nat-traversal 3600
crypto ikev1 enable outside
crypto ikev1 policy 10
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
crypto ikev1 policy 20
authentication pre-share
encryption aes-256
hash sha
group 2
lifetime 86400
group-policy GroupPolicy_S1.S1.S1.S1 internal
group-policy GroupPolicy_S1.S1.S1.S1 attributes
vpn-tunnel-protocol ikev1
group-policy remote_vpn_policy internal
group-policy remote_vpn_policy attributes
vpn-tunnel-protocol ikev1 l2tp-ipsec
username artem password 8xs7XK3To4s5WfTvtKAutA== nt-encrypted
username admin password rqiFSVJFung3fvFZ encrypted privilege 15
tunnel-group DefaultRAGroup general-attributes
address-pool vpn_pool
default-group-policy remote_vpn_policy
tunnel-group DefaultRAGroup ipsec-attributes
ikev1 pre-shared-key *****
tunnel-group DefaultRAGroup ppp-attributes
authentication ms-chap-v2
tunnel-group S1.S1.S1.S1 type ipsec-l2l
tunnel-group S1.S1.S1.S1 general-attributes
default-group-policy GroupPolicy_S1.S1.S1.S1
tunnel-group S1.S1.S1.S1 ipsec-attributes
ikev1 pre-shared-key *****
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
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 rsh
inspect rtsp
inspect esmtp
inspect sqlnet
inspect skinny
inspect sunrpc
inspect xdmcp
inspect sip
inspect netbios
inspect tftp
inspect ip-options
inspect icmp
service-policy global_policy global
prompt hostname context
no call-home reporting anonymous
Cryptochecksum:f55f10c19a0848edd2466d08744556eb
: end

Thanks for helping me again. I really appreciate.
I don't hve any NAT-exemptions in Cisco IOS Router. Transform-set I will change soon, but I've tried with tunnel mode and it didn't work.
Maybe NAT-exemptions is the issue. Can you advice me which exemptions should be in Cisco IOS Router?
Because on Cisco ASA I guess I have everything.
Here is show crypto session detail
router(config)#do show crypto session detail
Crypto session current status
Code: C - IKE Configuration mode, D - Dead Peer Detection
K - Keepalives, N - NAT-traversal, T - cTCP encapsulation
X - IKE Extended Authentication, F - IKE Fragmentation
Interface: GigabitEthernet0/0
Session status: DOWN
Peer: 198.0.183.225 port 500 fvrf: (none) ivrf: (none)
      Desc: (none)
      Phase1_id: (none)
IPSEC FLOW: permit ip 192.168.17.0/255.255.255.0 192.168.83.0/255.255.255.0
        Active SAs: 0, origin: crypto map
        Inbound: #pkts dec'ed 0 drop 0 life (KB/Sec) 0/0
        Outbound: #pkts enc'ed 0 drop 0 life (KB/Sec) 0/0
Should I see something in crypto isakmp sa?
pp-border#sh crypto isakmp sa
IPv4 Crypto ISAKMP SA
dst             src             state          conn-id status
IPv6 Crypto ISAKMP SA
Thanks again for your help.

Coherence::net::messaging::ConnectionException: could not establish a connection to one of the following addresses: {10.242.152.242/10.242.152.242:8088}; make sure the "remote-addresses" configuration element contains an address and port of a running TcpA

Hi
I have installed coheI have installed coherence server "fmw_12.1.3.0.0_coherence_Disk1_1of1.zip" along with Examples on windows machine and C++ client coherence-cpp-12.1.3.0.0b51709-windows-x86-vs2012.zip on the same machine.
I have built the "contacts" C++ Example successfully and while I execute this "contacts" using run I am facing TcpAcceptor error.
On my coherence server the TcpAcceptor is listening on port 8088, so I have modified the extend-cache-config.xml file with values "ip address of my windows machine" and port as "8088".
All the time I am getting below error,
coherence::net::messaging::ConnectionException: could not establish a connection to one of the following addresses: {10.242.152.242/10.242.152.242:8088}; make sure the "remote-addresses" configuration element contains an address and port of a running TcpAcceptor
    at class coherence::lang::TypedHandle<class coherence::component::net::extend::PofConnection> __thiscall coherence::component::util::TcpInitiator::openConne
ction(void)(TcpInitiator.cpp:307)
    at coherence::component::util::TcpInitiator::openConnection
    at coherence::component::util::Initiator::ensureConnection
    at coherence::component::net::extend::RemoteCacheService::openChannel
    at coherence::component::net::extend::RemoteService::doStart
    at coherence::component::net::extend::RemoteService::start
    at coherence::component::util::SafeService::startService
    at coherence::component::util::SafeService::restartService
    at coherence::component::util::SafeService::ensureRunningServiceInternal
    at coherence::component::util::SafeService::start
    at coherence::net::DefaultConfigurableCacheFactory::configureService
    at coherence::net::DefaultConfigurableCacheFactory::ensureService
    at coherence::net::DefaultConfigurableCacheFactory::ensureRemoteCache
    at coherence::net::DefaultConfigurableCacheFactory::configureCache
    at coherence::net::DefaultConfigurableCacheFactory::ensureCache
    at coherence::net::CacheFactory::getCache
    at unsigned __int64 coherence::lang::class_spec<class coherence::lang::Managed<class ContactId>,class coherence::lang::extends<class coherence::lang::Object,class coherence::lang::Void<class coherence::lang::Object> >,class coherence::lang::implements<void,void,void,void,void,void,void,void,void,void,void,void,void,void,void,void> >::sizeOf(bool)
    at _onexit
    at class coherence::util::Hashtable * coherence::lang::factory<class coherence::util::Hashtable>::create(void)
    at class coherence::util::Hashtable * coherence::lang::factory<class coherence::util::Hashtable>::create(void)
    at BaseThreadInitThunk
    at RtlInitializeExceptionChain
    at RtlInitializeExceptionChain
    on thread "main"
Caused by: coherence::net::messaging::ConnectionException: coherence::component::util::TcpInitiator::TcpConnection@029EAD78{Id=NULL, Open=1, LocalAddress=NULL,
RemoteAddress=10.242.152.242/10.242.152.242:8088}: socket disconnect
    at class coherence::lang::TypedHandle<class coherence::net::messaging::Response> __thiscall coherence::component::net::extend::AbstractPofRequest::Status::g
etResponse(void)(AbstractPofRequest.cpp:203)
    at coherence::component::net::extend::AbstractPofRequest::Status::getResponse
    at coherence::component::net::extend::AbstractPofRequest::Status::waitForResponse
    at coherence::component::util::Initiator::openConnection
    at coherence::component::net::extend::PofConnection::open
    at coherence::component::util::TcpInitiator::openConnection
    at coherence::component::util::Initiator::ensureConnection
    at coherence::component::net::extend::RemoteCacheService::openChannel
    at coherence::component::net::extend::RemoteService::doStart
    at coherence::component::net::extend::RemoteService::start
    at coherence::component::util::SafeService::startService
    at coherence::component::util::SafeService::restartService
    at coherence::component::util::SafeService::ensureRunningServiceInternal
    at coherence::component::util::SafeService::start
    at coherence::net::DefaultConfigurableCacheFactory::configureService
    at coherence::net::DefaultConfigurableCacheFactory::ensureService
    at coherence::net::DefaultConfigurableCacheFactory::ensureRemoteCache
    at coherence::net::DefaultConfigurableCacheFactory::configureCache
    at coherence::net::DefaultConfigurableCacheFactory::ensureCache
    at coherence::net::CacheFactory::getCache
    at unsigned __int64 coherence::lang::class_spec<class coherence::lang::Managed<class ContactId>,class coherence::lang::extends<class coherence::lang::Object
,class coherence::lang::Void<class coherence::lang::Object> >,class coherence::lang::implements<void,void,void,void,void,void,void,void,void,void,void,void,void
,void,void,void> >::sizeOf(bool)
    at _onexit
    at class coherence::util::Hashtable * coherence::lang::factory<class coherence::util::Hashtable>::create(void)
    at class coherence::util::Hashtable * coherence::lang::factory<class coherence::util::Hashtable>::create(void)
    at BaseThreadInitThunk
    at RtlInitializeExceptionChain
    at RtlInitializeExceptionChain
    on thread "main"
Caused by: coherence::io::IOException: socket disconnect
    at unsigned int __thiscall coherence::net::Socket::readInternal(unsigned char *,unsigned int)(Socket.cpp:333)
    at coherence::net::Socket::readInternal
    at coherence::net::Socket::SocketInput::read
    at coherence::io::BufferedInputStream::fillBuffer
    at coherence::io::BufferedInputStream::read
    at coherence::component::util::TcpInitiator::readMessageLength
    at coherence::component::util::TcpInitiator::TcpConnection::TcpReader::onNotify
    at coherence::component::util::Daemon::run
    at coherence::lang::Thread::run
    on thread "ExtendTcpCacheService:coherence::component::util::TcpInitiator:coherence::component::util::TcpInitiator::TcpConnection::TcpReader"

We are facing same issue.    Could you please provide us any working .Net sample code for the version 12.1.2.0.
<ssl>
              <protocol>Tls</protocol>
              <local-certificates>
                <certificate>
                  <url>c:\Cert\</url>
                  <password>password</password>
                  <flags>DefaultKeySet</flags>
                </certificate>
              </local-certificates>
            </ssl>
thanks
Bala

Sockets and ports - routing messages between machines? helpppp!

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