I have installed kannel on SuSE Linux. I also configured SuSE's Firewall feature and close all ports except for the ports that kannel uses and it is also in a private network. In short I configured kannel on a secured server.
It is running fine for at leat a year now, without a problem. Until today. Here's the what we encountered. Our kannel stops receiving incoming transaction from our local telco. We traceroute and ping to the telco's SMS Server and we were able to get a reply ( though kannel do not receive transaction ). We called the telco's Firewall Administrator and discuss to him our problem. According to him our server is port scanning their Server, thus Firewall drops our connection. My question is this. Can Kannel do a port scan if it do not receive transaction? Thank you very much, Andy
