Connecting to Sandbox

Hi , I am able to connect to Sandbox from my personal laptop, while connecting from my office getting connection refused, do we need to enable open any specific port or modify any firewall settings? Could you please suggest? Error log: Caused by: org.apache.http.conn.HttpHostConnectException: Connect to sandbox.esignlive.com:443 [sandbox.esignlive.com/54.85.59.26] failed: Connection timed out: connect at org.apache.http.impl.conn.HttpClientConnectionOperator.connect(HttpClientConnectionOperator.java:142) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:319) at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:363) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:219) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:195) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:86) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:108) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) at com.silanis.esl.sdk.internal.RestClient.execute(RestClient.java:188) at com.silanis.esl.sdk.internal.RestClient.post(RestClient.java:105) at com.silanis.esl.sdk.service.PackageService.createPackage(PackageService.java:52) ... 2 more Caused by: java.net.ConnectException: Connection timed out: connect