Port 1435IBM CICS

IBM CICS service traffic assigned to TCP and UDP port 1435.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

Technical Details

what runs on :1435

The registry assigns TCP and UDP port 1435 to IBM CICS. In practice, CICS network connectivity is primarily TCP-based and is configured per CICS region or TCP/IP service; not every CICS installation listens on 1435, and the exact application protocol depends on the CICS component and configuration. Legacy CICS connectivity is not inherently encrypted, although TLS can be enabled through the relevant IBM security and communications configuration.

Security Information

exposure of :1435

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

system averages 2.7 across 928 ports — this one sits 4.3 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

An exposed CICS listener may provide access to sensitive business transactions and mainframe data, depending on its authentication and authorization configuration. It should normally be restricted to trusted application hosts or protected by a VPN and firewall; Internet exposure can enable protocol probing, credential attacks, and unauthorized transaction attempts, particularly where legacy cleartext connectivity is used.

Record

iana registry entry

port: :1435
service: IBM CICS
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: System
usage: This port is assigned to IBM CICS, IBM's transaction-processing system for z/OS and other mainframe environments. It may be exposed by a CICS region's TCP/IP listener or related CICS connectivity component; most deployments are private mainframe services rather than Internet-facing endpoints.
lookups: 0rank 993
added: 2026-08-23
updated: 2026-09-22
references: IANA service name registry — port 1435

Something wrong?

This record is maintained by the engineers who use port 1435. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-22.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 928 in system →

the 8 most looked-up other ports in system — 928 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:4664	Google Desktop Search	TCP	System	caution	67.2k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:9080	WebSphere HTTP Transport (default)	TCP	Web Services	caution	51.6k
:23	Telnet	TCP	Remote Access	caution	34.8k
:12489	NSClient Monitoring Agent	TCP	Network Services	caution	30.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :1435IBM CICS

Technical Details

Security Information

Related Ports

Port 1435IBM CICS