419

Port 419/tcp is registered with IANA under the service name ariel1 ("Ariel 1"), but no confirmed application or deployed service is known to run on it today, so there is no established public-vs-internal exposure pattern to recommend — any traffic seen on this port should be treated as unexplained rather than routine.

The IANA registry lists 419 as dual-registered on both TCP and UDP, with assignee and contact both recorded as Joel Karafin. The Reference column is blank — no RFC or other defining document is cited — and no registration date is published for this entry.

No credible, currently active software was found to commonly generate traffic on port 419. IBM QRadar and Juniper JSA SIEM products ship an unrelated component also named "Ariel" (the Ariel database / AQL query language), but that functionality is documented on other ports, such as 32006, not on port 419 — this is a coincidental namesake, not an actual sighting.

No malware family is attributed to port 419 by any source that resolves.

Exposure

Unknown — no confirmed legitimate application has been documented running on port 419, so there is no curated basis to call it internet-facing, restricted, or internal-only; investigate unexpected traffic rather than assuming a known service.

Malware/threat association

None confirmed — no source that resolves attributes a specific malware family to port 419.

Registration data

IANA records no RFC/reference and no registration date for this entry; both are left blank/Unknown rather than guessed.

IANA assignment

ariel1 — "Ariel 1"; reference (blank — no RFC cited); assignee [Joel_Karafin]; dual-registered 419/tcp + 419/udp [Confirmed] — IANA Service Name and Transport Protocol Port Number Registry; cached registry CSV

Range class

well-known (0–1023) [Confirmed] — port number falls in the IANA well-known range

Prevalence

0.000138 — nmap-services open-frequency figure [Confirmed] — this site's own tooling

Related ports

none directly related is confirmed; contrast the unrelated IBM QRadar/JSA "Ariel" SIEM component, which is documented on other ports such as 32006 [Confirmed as distinct]

Primary use

no confirmed current deployed application under this registered name

Other/unofficial uses

none confirmed; the IBM QRadar/Juniper JSA "Ariel" SIEM database component is a coincidental namesake documented on different ports (e.g., 32006), not this one

Security implications

no confirmed legitimate application; no malware family is attributed to port 419 by any source that resolves [Confirmed negative]

Typically seen on

no confirmed typical host population — [Unknown]

Analyst note

treat port 419 as an obscure, sparsely-documented legacy IANA registration with no confirmed modern use — investigate any observed traffic rather than assuming it maps to a known service.

Port 419/udp is registered with IANA under the service name ariel1 ("Ariel 1"), but no protocol specification, RFC, or software vendor documents what actually runs on it — so there is no established legitimate reason for it to be reachable from the public internet, and any observed traffic should be treated as unexplained rather than assumed benign.

The IANA registry entry is a bare name-and-number reservation, dual-registered for both 419/tcp and 419/udp, assigned to Joel Karafin, with a blank Reference field and no Registration or Modification Date recorded. No RFC or other technical specification is cited for the ariel1 service, and nothing beyond this listing describes what the service does or when it was added to the registry.

Searches across IANA mirrors, port-lookup aggregators (wintelguy.com, ports.my-addr.com), and general web search found no vendor, game client, or other software documented as implementing ariel1 on 419/udp, and no scanning-trend or threat-intel writeup gave the port notable attention. One aggregator explicitly recorded "no data" for trojan associations on port 419, in contrast to unrelated malware flags noted on the neighboring port 420 — that finding belongs to 420, not 419, and is not evidence about this port.

Exposure

No documented legitimate deployment exists for 419/udp; treat any observed traffic as unexplained and worth investigating rather than routine.

Malware

No credible trojan or malware association specific to 419 was found in this pass; a lookup aggregator recorded "no data" for the port.

Recommendation

Because no software or protocol is confirmed to use this port, there is no basis to allow it through a public-facing firewall; block or investigate unexpected 419/udp traffic.

IANA assignment

ariel1 — "Ariel 1"; reference (blank); assignee [Joel_Karafin]; dual-registered 419/tcp + 419/udp [Confirmed] — the IANA Service Name and Transport Protocol Port Number Registry lines 831-832

Range class

well-known (0–1023) [Confirmed]

Prevalence

419/udp = 0.000544; 419/tcp = 0.000138 — nmap-services open-frequency figures [Confirmed] — this site's own tooling

Related ports

419/tcp (dual registration, same ariel1 name); 420/tcp,udp (unrelated malware flags noted by one aggregator — do not conflate with 419)

Primary use

Unknown — the IANA registry provides only a name-and-number reservation, with no protocol specification, RFC, or further description published

Other/unofficial uses

Unknown — no vendor, application, game/P2P client, or other software was found documented as implementing ariel1 on 419/udp across IANA mirrors, port-lookup aggregators, or general web search [Unknown] — https://wintelguy.com/port-search/419, http://ports.my-addr.com/tcp_port-udp_port-application-and-description.php?port=419

Security implications

no credible trojan/malware association found for 419 itself; one aggregator recorded "no data" for trojan flags on this port, distinct from unrelated flags noted on neighboring port 420

Typically seen on

no documented hosts or software; an observed listener would be an anomaly worth investigating

Analyst note

This is a registry-only assignment with no confirmed real-world usage; do not infer a "typical" traffic source, and flag any observed 419/udp activity for manual review.