| v1.8.172 | New & Enhancements: - Updated Ethernet controller driver
 - Updated USB-to-Serial bridge driver
 Bug Fixes:
 - Fixed compatibility issue with SSH client of Cisco ISR 4461 / Cisco Catalyst 9930
 - Fixed memory usage issue
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| v1.7.167 | New & Enhancements: - Support the following special characters for the password of user account, SNMP and SMTP.
 { } | , . :
 - Excluded IP address in IP Filter (Device Management > Security > Security) are not able to ping SN
 Bug Fixes:
 - Port list in Port Access might display incorrectly with "parse update message error" when accessing SN through Chrome or Edge
 - The port name of SN might not sync with CCVSR correctly
 - SN might not sync with NTP server correctly
 - SSH/Telnet sessions might become disconnected due to occupy timeout issue
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| v1.7.164 | New & Enhancements: - Support PAP authentication for TACACS+
 Bug Fixes:
 - Fixed OpenSSH vulnerability (CVE-2018-15919 & CVE-2018-15473)
 - Fixed SSH connection might be denied after a certain number of login failure
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| v1.7.161 | New & Enhancements: - Added"Response Check"(Port Access > Properties > Operating Mode) and its notification (Log > Notification Setting) feature to detect the status of connected serial devices.
 Bug Fixes:
 - Multiple connections to a serial might cause disconnection when"Port Name Auto Discovery"is enabled.
 Changes:
 - For SN91xxCO/COD series, using port1 as console port is disabled by default (Device Management > OOBC > Console Port Settings).
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| v1.6.157 | - Special characters supported for password and account policy - Added "display device name in login screen" option (Device Management > Device > Device Information)
 - Saving port logs from the operating modes of Real COM Port, TCP Server/Client, UDP Server/Client, and Virtual Modem to Syslog server is supported.
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| v1.6.156 | - Fixed the remote connection issue for SN01xxCO/COD where a console server is deployed behind a firewall (NAT). |  | 
| v1.6.155 | - Added "Port Name Auto Discovery" feature in Device Management > Device Information - Added "Size" category in terminal settings of toolbar of SNViewer for adjusting viewer's window size
 - Default password will be required to change during first-time login
 - Enhanced MIB file
 - Enhanced integration with CC2000
 | - For #1 feature, compatible network switches: Cisco, Juniper, HPE, Dell, Huawei, H3C, EdgeCore, TRENDnet, Fortinet and ATEN ES0152. |