Hi there
We have trouble about make application links between jira(8.9.0) server and confluence(7.5.1) server.
We using aws EC2, jira use 8443 port and confluence use 9443 port
At first try we make application links, but can't make connect between two. 
second we try make jira custom server -> custom directory, and last when we try in confluence we receive this [org.apache.http.conn.ConnectTimeoutException: Connect to 161.189.217.105:18080 [/161.189.217.105] failed: connect timed out] as figure show below
below is confluence log
Caused by: com.atlassian.crowd.exception.OperationFailedException: org.apache.http.conn.ConnectTimeoutException: Connect to 161.189.217.105:18080 [/161.189.217.105] failed: connect timed out
at com.atlassian.crowd.integration.rest.service.RestExecutor$MethodExecutor.andReceive(RestExecutor.java:378)
at com.atlassian.crowd.integration.rest.service.RestCrowdClient.searchUsers(RestCrowdClient.java:513)
at com.atlassian.crowd.integration.rest.service.RestCrowdClient.testConnection(RestCrowdClient.java:503)
at com.atlassian.crowd.directory.RemoteCrowdDirectory.testConnection(RemoteCrowdDirectory.java:668)
at com.atlassian.crowd.embedded.core.CrowdDirectoryServiceImpl.testConnection(CrowdDirectoryServiceImpl.java:61)
... 367 more
Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to 161.189.217.105:18080 [/161.189.217.105] failed: connect timed out
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:151)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376)
at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
at org.apache.http.impl.client.cache.CachingExec.callBackend(CachingExec.java:592)
at org.apache.http.impl.client.cache.CachingExec.execute(CachingExec.java:269)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at com.atlassian.crowd.integration.rest.service.RestExecutor$MethodExecutor.executeCrowdServiceMethod(RestExecutor.java:495)
at com.atlassian.crowd.integration.rest.service.RestExecutor$MethodExecutor.andReceive(RestExecutor.java:367)
... 371 more
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
... 383 more
2020-07-15 02:50:47,993 INFO [Caesium-1-4] [agent.service.check.StaleChecksCleaner] info Cleaning stale checks
please help me solve this issue, thanks
