HTTP to RFC scenario - unable to consume URL link

Hi All,

I'm working on a HTTP to RFC scenario.

Below is the URL link PI QAS Server to push XML data.

http://Server IP:Port/sap/xi/adapter_plain?

namespace=http%3A//rediff/ProjectSTAR/SME&interface=SI_OUT_ASYN_DIALER_CRM&

service=BS_SME&party=&agency=&scheme=&QOS=EO&sap-user=xxxxx&sap-password=XXXXXX&

sap-client=210&sap-language=EN

But the 3rd party system says that they are unable to push XML data because of may be below reasons.

1. Ports are not open from SAP end.

2. Firewalls may be there from SAP end.

3rd party is unable to consume the above link.

But if they push it on PI PRD Server's URL link, it shows ports are open and they are able to consume the link.

Please guide me on this to receive data on SAP PI QAS server also.

Regards,

Amit P