Encryption of Interactive Messages - Discontinuation of Old Interactive Parameters
NSE circular NSE/MSD/75014 · 02 Jul 2026
Official title
Encryption of Interactive Messages - Reminder for Discontinuation of Old Interactive Parameters
Official record
Open source pageSummary
Check the official recordWhat changed
The National Stock Exchange of India Limited mandates the discontinuation of old interactive ports for message encryption. This update follows the previous circular regarding new CA certificates. All members must transition to the new interactive ports for connectivity. The exchange will disable the old interactive ports effective July 05, 2026. Members must update their systems to use the specified new ports for the CM, FO, CD, COM, and SLBM segments. All other previously communicated details remain in effect.
What you must do
- Members must transition to the new interactive ports for connectivity.
Key dates
- Effective from
- 05 Jul 2026
- Discontinuation of old interactive ports
- 05 Jul 2026
Document text
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
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 |
Source details
- Source
- National Stock Exchange of India
- Type
- circular
- Published by source
- 02 Jul 2026
- Document number
- NSE/MSD/75014
- Issuing division
- MEMBER SERVICE DEPARTMENT
- Effective date
- 05 Jul 2026
- Coverage area
- securities