Dear Hiring Manager
I have over 4 years experience of conifguring,troubleshooting various vendors based network equipment, having experience of configuring Zywell,Cisco based firewalls. the issue looks to be your firewall and not the server issue.
i am a CCNP (R&S,Security) and would be able to do this job in minimum time possible. looking forward to have a good working relationship with you.
Regards
Asad