TCP: S2C Duplicate Sequence Number Segment Retransmission
This protocol anomaly triggers when it detects a TCP segment retransmission from the server to client in which the retransmitted data has the same sequence number but differs from the original data. This is a common IDS evasion attack; do not allow these packets to pass IDP.
Short Name
TCP:AUDIT:S2C_SAMESQ_DATA_MIS
Severity
Minor
Recommended
False
Recommended Action
Drop
Category
TCP
Release Date
08/08/2019
Supported Platforms
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3
Sigpack Version
3324
False Positive
Unknown