RTH – Sofia Use TCP/IP As the Data Transport Protocol, with FTP, to All Connections

STATUS OF IMPLEMENTATION OF RTH Sofia

Submitted by Mariana Grueva, Head of Telecommunication Division, NIMH Sofia, Bulgaria

ISS/ICM-MTN & ET-OI 2006 Geneva, 16-19 May 2006 RTH SOFIA

• RTH - Sofia’s zone of responsibility as appointed to the regional meteorological telecommunication plan are: Albania, Bulgaria, Cyprus, The Former Yugoslav Republic of Macedonia, Romania, Serbia and Montenegro and Syrian Arab Republic.

• RTH - Sofia successfully migrated to the Regional Meteorological Data Communication Network (RMDCN) in Region VI (in March 2000).

• RTH – Sofia use TCP/IP as the data transport protocol, with FTP, to all connections. RTH SOFIA

Types of data received in RTH Sofia

ASCII - 13% GRIB - 9% T4 - 39% ALADIN - 39% RTH SOFIA

Number of bulletins received in RTH Sofia

ASCII - 95% GRIB - 4% T4 - 1% ALADIN - < 1% RTHCircuits SOFIA RMDCN; IN OUT (Kbps) RTH Vienna 8 8 RTH Offenbach: 32 16 IPSecNMC VPNBudapest over Internet 16 8 ECMWF: 64 16 The VCP Coordinated Project: The Project of RTH Sofia was implemented in NMCInternet ImplementationRAVPN VI RMDCN of theTirana GTS on circuit March Tirana/Sofia2006 over the Internet Message SwitchingNMC System BELGRADE Facilities: Message Switching System MSS TRANSMET (Meteo France) running on OS Linux (Slackware) and The presented project cover the necessity for operative international Communications IntelMESSIR based PCs – Comm (Pentium (COROBOR) IV - 2 MHz). telecommunication link of NMC-Tirana into the GTS under the recommendationsNMC of TIRANA RTH PRAGUE LAN accessInstalledWindowsto POP in 2002 server by professional RTH Sofia. 2003 - WMO. Data base systemLength - developed of bulletins by RTH that Sofia. can be handled Circuits•VPN server RTH SOFIA The Project propose: 300K RTH TOULOUSE - softwareAFD emulation EndbasedMaximum of 2006on lengthis PC/the target ofFree bulletins dateBSD to : upgrade the system ■ PC -based file distribution system at NMC-Tirana; √ RMDCN alphanumericand to reach – the15KB 500K. ■ IPSec VPNInstalled over byInternet.RTH Sofia. Goal IN OUT binary(Kbps) – no limit WMC Moscow 16 Satellite 8 distribution systems: The point of the Project is the establishment of “Virtual Private Network” (VPN) ECMWF 64Other systems: 8 over the public Internet. Corporative Intranet environmentNMC SKOPJE– VPN technologies WMC MOSCOW DWDSAT √ NMC Chisinau - a PTTRETIM2000 analogueNTSADIS link (19.2 - 33 Kbps)RTH-Sofia ↔ NMC-Tirana How METEOSATKONGSBERG MSG SPACETC’S MSG Ground receiving station Message Switching SystemRTH-Sofia implements all of Internet services and Internet technologies  Data exchangeas VPN, oversecurity global methodsNMC BUCHAREST Internet and technologies, etc. MESSIR-COMM (Corobor) IPsecRTH-Sofiatechnology implements WWW-server and Web technologies. Length of bulletinsAFTN that - V.can35 be handled 500K AFTN RETIM2000 - receiver,MESSIR VISION application. Other systems:NMC ATHENS MSG system by COROBORNMC LARNACA - 2006 RETIM2000 NMC DAMASCUS RTH-Sofia n e VPN+IPSec+ Firewall DMZ PC (4) t Free BSD w o leased line r POP k Internet POP c leased line o NMC-Tirana VPN+IPSec+ Firewal + n NAT f DMZ PC Free (1) i BSD Internet Access Device g u r a PC (2) LAN Linux t FTP server Intranet + i AFD (3) o PC Windows IPSec Tunnel + n operator work place IKE RTH SOFIA

Back-up systems

• Transfer of bulletins to RTH-Sofia by using of HTTPS protocol

• Exchange of data by using of e-mail RTH SOFIA

Advantages:

√ By connecting NMC Tirana to GTS is decreased the number of NMCs in the RTH Sofia’s zone of responsibility not included to the GTS;

√ RTH Sofia and all associated NMCs in the zone of responsibility use Internet;

√ Using of e-mail for the administrative exchange of message;

√ Promptly and in time change of the set of data exchanged in the zone of responsibility by a NMC request and between MTN RTHs, as well. RTH SOFIA Problems

About connection to the GTS √ There is a NMC not connected to GTS yet: NMC Damascus

VPN/IPSec over Internet connection between RTH Sofia and NMC Damascus – recommendation of RAVI WG PIW, fifth session;

√ NMC Larnaca uses low speed connection to GTS via NMC Athens

The attempt of RTH Sofia could be apply in NMC Larnaca for the VPN/IPSec over Internet connection between RTH Sofia and NMC Larnaca by the implementation of a relevant project;

About equipments RTH Sofia needs of the hardware upgrade.

ABOUT ADMINISTRATIVE COMMUNICATIONS The exchange of administrative messages to/from NMC Skopje is very difficult to its focal point.

OTHERS

A need of training – new telecommunication/IT technologies. RTH SOFIA

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