Encryption of Interactive Messages - Reminder for Discontinuation of Old Interactive Parameters

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National Stock Exchange of India Limited Circular Department: MEMBER SERVICE DEPARTMENT Download Ref No: NSE/MSD/75014 Date: July 02, 2026 Circular Ref. No: 50/2026 All Members, Encryption of Interactive Messages – Reminder for Discontinuation of old Interactive Parameters This is in reference to Exchange circular NSE/MSD/74511 dated June 02, 2026 regarding new CA certificate for encryption of interactive messages and discontinuation of old interactive parameters. Members are advised to take note that the old interactive port as mentioned below shall be discontinued with effect from July 05, 2026. Parameters for Interactive Connectivity for Encrypted Data Flow Segment Gateway Router Gateway IPs Subnet ranges IP Address New Port Old Port Network Mask Port CM 172.19.12.85 10827 10817 172.19.12.0 255.255.255.128 10810 10831* 10823* 10833** 10825** FO 172.19.13.85 10837 10827 172.19.13.0 255.255.255.128 10820 10841* 10833* 10843** 10835** CD 172.19.18.85 10885 10877 172.19.18.0 255.255.255.128 10870 & 10871 10889* 10879* 10891** 10881** COM 172.19.15.85 10865 10857 172.19.15.0 255.255.255.128 10850 10869* 10859* 10871** 10861** SLBM 172.19.14.85 10889 10887 172.19.14.0 255.255.255.128 10860 *Port – This port will support new encryption messages with MD5 checksum removal. **Port - This port will support new encryption messages with MD5 checksum removal and new immediate Ack request for order related messages. National Stock Exchange of India Limited Page 2 of 2 Accordingly, members who are still login via old ports are advised to use only new interactive ports. Please note all other details as mentioned in the above circular shall remain unchanged. For and on behalf of National Stock Exchange of India Limited Khushal Shah Associate Vice President Toll Free No Email id 1800-266-0050 (Option 1) msm@nse.co.in