I'm trying to test the connection with the Force.com Migration Tool and ANT to our salesforce org and while on the company network, I'm getting the below errors.  If I'm off of the company network, it will work, so it has to be the proxy.  I can't figure out how to get the proxy settings to work.  I've entered them in every place I've found mentioned out on the internet but nothing is working.  Anyone have any ideas?

Failed to login: Failed to send request to https://test.salesforce.com/services/Soap/u/31.0
at com.salesforce.ant.SFDCAntTask.doLogin(SFDCAntTask.java:218)
at com.salesforce.ant.SFDCAntTask.getMetadataConnection(SFDCAntTask.java:248)
at com.salesforce.ant.SFDCMDAPIAntTaskRunner.runTask(SFDCMDAPIAntTaskRunner.java:20)
at com.salesforce.ant.RetrieveTask.execute(RetrieveTask.java:110)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.Main.runBuild(Main.java:851)
at org.apache.tools.ant.Main.startAnt(Main.java:235)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: com.sforce.ws.ConnectionException: Failed to send request to https://test.salesforce.com/services/Soap/u/31.0
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:120)
at com.sforce.soap.partner.PartnerConnection.login(PartnerConnection.java:1652)
at com.salesforce.ant.SFDCAntTask.doLogin(SFDCAntTask.java:212)
... 20 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:618)
at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:160)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:275)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:371)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:975)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1091)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:250)
at com.sforce.ws.transport.JdkHttpTransport.connectRaw(JdkHttpTransport.java:133)
at com.sforce.ws.transport.JdkHttpTransport.connectLocal(JdkHttpTransport.java:97)
at com.sforce.ws.transport.JdkHttpTransport.connectLocal(JdkHttpTransport.java:92)
at com.sforce.ws.transport.JdkHttpTransport.connect(JdkHttpTransport.java:88)
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:94)
... 22 more

Total time: 3 seconds
# On branch master
nothing to commit (working directory clean)
Everything up-to-date
Branch master set up to track remote branch master from origin.
Finished: SUCCESS

Just this Monday we started experience a connection exception with our scheduled command line calls to the data loader.  The data loader will start loading the data but will throw an exception midway through on each upsert job now.  This is happening in 2 out of our 4 environments.  No changes happened on our side....I have used asterisks to mask certain information below in the stack trace.  You can see it connects successfully but in the middle of the job seems to have issues.  Havent changed anything in months, ran perfectly until this past Monday.

F:\Program Files (x86)\salesforce.com\Data Loader\UC4>"../bin/process.bat" "../Configuration" contactUpsert
2014-06-16 03:02:37,876 INFO  [main] controller.Controller initLog (Controller.java:389) - Using built-in logging configuration, no log-conf.xml in F:\Program Files (x86)\salesforce.com\Data Loader\UC4\log-conf.xml
2014-06-16 03:02:37,891 INFO  [main] controller.Controller initLog (Controller.java:391) - The log has been initialized
2014-06-16 03:02:37,891 INFO  [main] process.ProcessConfig getBeanFactory (ProcessConfig.java:103) - Loading process configuration from config file: F:\Program Files (x86)\salesforce.com\Data Loader\UC4\..\Configuration\process-conf.xml
2014-06-16 03:02:38,047 INFO  [main] xml.XmlBeanDefinitionReader loadBeanDefinitions (XmlBeanDefinitionReader.java:315) - Loading XML bean definitions from file [F:\Program Files (x86)\salesforce.com\Data Loader\UC4\..\Configuration\process-conf.xml]
2014-06-16 03:02:38,235 INFO  [contactUpsert] controller.Controller initConfig (Controller.java:327) - config dir created at F:\Program Files (x86)\salesforce.com\Data Loader\UC4\..\Configuration
2014-06-16 03:02:39,030 INFO  [contactUpsert] controller.Controller initConfig (Controller.java:355) - The controller config has been initialized
2014-06-16 03:02:39,030 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:116) - Initializing process engine
2014-06-16 03:02:39,030 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:119) - Loading parameters
2014-06-16 03:02:39,030 INFO  [contactUpsert] config.LastRun load (LastRun.java:96) - Last run info will be saved in file: F:\Program Files (x86)\salesforce.com\Data Loader\UC4\..\Configuration\contactUpsert_lastRun.properties
2014-06-16 03:02:39,139 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:127) - Logging in to: https://test.salesforce.com
2014-06-16 03:02:39,155 INFO  [contactUpsert] client.PartnerClient login (PartnerClient.java:478) - Beginning Partner Salesforce login ....
2014-06-16 03:02:39,155 INFO  [contactUpsert] client.ClientBase getConnectorConfig (ClientBase.java:123) - Salesforce login will use proxy host: ********
2014-06-16 03:02:39,186 INFO  [contactUpsert] client.PartnerClient loginInternal (PartnerClient.java:519) - Salesforce login to https://test.salesforce.com/services/Soap/u/28.0 as user *******.com.dev
2014-06-16 03:02:40,216 INFO  [contactUpsert] client.ClientBase getConnectorConfig (ClientBase.java:123) - Salesforce login will use proxy host: squid.td.afg port: 3128
2014-06-16 03:02:40,216 INFO  [contactUpsert] dao.DataAccessObjectFactory getDaoInstance (DataAccessObjectFactory.java:51) - Instantiating data access object: \\************\MDS_CRM_Contact.csv of type: csvRead
2014-06-16 03:02:40,216 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:132) - Checking the data access object connection
2014-06-16 03:02:40,231 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:137) - Setting field types
2014-06-16 03:02:41,261 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:141) - Setting object reference types
2014-06-16 03:02:44,396 INFO  [contactUpsert] process.ProcessRunner run (ProcessRunner.java:145) - Creating Map
2014-06-16 03:02:44,412 INFO  [contactUpsert] action.OperationInfo instantiateAction (OperationInfo.java:95) - Instantiating action for operation: upsert
2014-06-16 03:02:44,459 INFO  [contactUpsert] controller.Controller executeAction (Controller.java:120) - executing operation: upsert
2014-06-16 03:02:44,459 INFO  [contactUpsert] action.AbstractAction execute (AbstractAction.java:120) - Loading: upsert
2014-06-16 03:02:49,654 INFO  [contactUpsert] progress.NihilistProgressAdapter setSubTask (NihilistProgressAdapter.java:78) - Processed 200 of 40,596 total records. Rate: 263,000 records per hour. Estimated time to complete: 9 minutes and 11 seconds.  There are 200 successes and 0 errors.
2014-06-16 03:02:55,129 INFO  [contactUpsert] progress.NihilistProgressAdapter setSubTask (NihilistProgressAdapter.java:78) - Processed 400 of 40,596 total records. Rate: 275,000 records per hour. Estimated time to complete: 8 minutes and 45 seconds.  There are 400 successes and 0 errors.
2014-06-16 03:02:56,752 INFO  [contactUpsert] progress.NihilistProgressAdapter setSubTask (NihilistProgressAdapter.java:78) - Processed 600 of 40,596 total records. Rate: 1,590,000 records per hour. Estimated time to complete: 1 minutes and 30 seconds.  There are 600 successes and 0 errors.
2014-06-16 03:03:57,138 ERROR [contactUpsert] client.PartnerClient runOperation (PartnerClient.java:332) - Error while calling web service operation: upsert, error was: Failed to send request to https://************--Dev.cs11.my.salesforce.com/services/Soap/u/28.0/*************
com.sforce.ws.ConnectionException: Failed to send request to https://**********--Dev.cs11.my.salesforce.com/services/Soap/u/28.0/***********
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:120)
at com.sforce.soap.partner.PartnerConnection.upsert(PartnerConnection.java:1094)
at com.salesforce.dataloader.client.PartnerClient$3.run(PartnerClient.java:100)
at com.salesforce.dataloader.client.PartnerClient$3.run(PartnerClient.java:92)
at com.salesforce.dataloader.client.PartnerClient.runOperation(PartnerClient.java:328)
at com.salesforce.dataloader.client.PartnerClient.loadUpserts(PartnerClient.java:250)
at com.salesforce.dataloader.action.visitor.UpsertVisitor.executeClientAction(UpsertVisitor.java:52)
at com.salesforce.dataloader.action.visitor.PartnerLoadVisitor.loadBatch(PartnerLoadVisitor.java:66)
at com.salesforce.dataloader.action.visitor.DAOLoadVisitor.visit(DAOLoadVisitor.java:105)
at com.salesforce.dataloader.action.AbstractLoadAction.visit(AbstractLoadAction.java:85)
at com.salesforce.dataloader.action.AbstractAction.execute(AbstractAction.java:129)
at com.salesforce.dataloader.controller.Controller.executeAction(Controller.java:121)
at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:149)
at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:100)
at com.salesforce.dataloader.process.ProcessRunner.main(ProcessRunner.java:253)
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
at com.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificates(Unknown Source)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
at org.apache.http.conn.ssl.SSLSocketFactory.createLayeredSocket(SSLSocketFactory.java:628)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.updateSecureConnection(DefaultClientConnectionOperator.java:232)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.layerProtocol(ManagedClientConnectionImpl.java:401)
at org.apache.http.impl.client.DefaultRequestDirector.establishRoute(DefaultRequestDirector.java:837)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:644)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
at com.salesforce.dataloader.client.HttpClientTransport.getContent(HttpClientTransport.java:129)
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:96)
... 14 more
2014-06-16 03:03:57,138 ERROR [contactUpsert] action.AbstractAction handleException (AbstractAction.java:204) - Exception occured during loading
com.salesforce.dataloader.exception.LoadException: Failed to send request to https://*********--Dev.cs11.my.salesforce.com/services/Soap/u/28.0/***********
at com.salesforce.dataloader.action.visitor.DAOLoadVisitor.handleException(DAOLoadVisitor.java:147)
at com.salesforce.dataloader.action.visitor.DAOLoadVisitor.handleException(DAOLoadVisitor.java:151)
at com.salesforce.dataloader.action.visitor.PartnerLoadVisitor.loadBatch(PartnerLoadVisitor.java:70)
at com.salesforce.dataloader.action.visitor.DAOLoadVisitor.visit(DAOLoadVisitor.java:105)
at com.salesforce.dataloader.action.AbstractLoadAction.visit(AbstractLoadAction.java:85)
at com.salesforce.dataloader.action.AbstractAction.execute(AbstractAction.java:129)
at com.salesforce.dataloader.controller.Controller.executeAction(Controller.java:121)
at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:149)
at com.salesforce.dataloader.process.ProcessRunner.run(ProcessRunner.java:100)
at com.salesforce.dataloader.process.ProcessRunner.main(ProcessRunner.java:253)
Caused by: com.sforce.ws.ConnectionException: Failed to send request to https://*********--Dev.cs11.my.salesforce.com/services/Soap/u/28.0/*************
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:120)
at com.sforce.soap.partner.PartnerConnection.upsert(PartnerConnection.java:1094)
at com.salesforce.dataloader.client.PartnerClient$3.run(PartnerClient.java:100)
at com.salesforce.dataloader.client.PartnerClient$3.run(PartnerClient.java:92)
at com.salesforce.dataloader.client.PartnerClient.runOperation(PartnerClient.java:328)
at com.salesforce.dataloader.client.PartnerClient.loadUpserts(PartnerClient.java:250)
at com.salesforce.dataloader.action.visitor.UpsertVisitor.executeClientAction(UpsertVisitor.java:52)
at com.salesforce.dataloader.action.visitor.PartnerLoadVisitor.loadBatch(PartnerLoadVisitor.java:66)
... 7 more
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
at com.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificates(Unknown Source)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
at org.apache.http.conn.ssl.SSLSocketFactory.createLayeredSocket(SSLSocketFactory.java:628)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.updateSecureConnection(DefaultClientConnectionOperator.java:232)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.layerProtocol(ManagedClientConnectionImpl.java:401)
at org.apache.http.impl.client.DefaultRequestDirector.establishRoute(DefaultRequestDirector.java:837)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:644)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
at com.salesforce.dataloader.client.HttpClientTransport.getContent(HttpClientTransport.java:129)
at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:96)
... 14 more
2014-06-16 03:03:57,138 ERROR [contactUpsert] progress.NihilistProgressAdapter doneError (NihilistProgressAdapter.java:58) - Failed to send request to https://********--Dev.cs11.my.salesforce.com/services/Soap/u/28.0/************
Program 'UC4 Job Messenger' version '9.00A' started