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Port 3503 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
3503 tcp,udp lsp-ping Arista Networks EOS - On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication.. References: [CVE-2025-6188]

MPLS LSP-echo Port [RFC 4379] (IANA official)
SG
3503 tcp,udp lsp-ping MPLS LSP-echo Port [RFC8029] IANA
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