Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 HF2, 11.5.4, 11.5.4 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4
Fixed In:
12.1.0, 11.6.1, 11.5.4 HF2
Opened: Aug 20, 2015 Severity: 4-Minor Related Article:
K51114681
HTTP/HTTPS) monitors send unexpected data (crlfcrlf) after completion of TCP and/or SSL handshake.
A monitor configured with a 'none' send string sends a 4-byte string, \r\n\r\n (crlfcrlf), after completing the handshake. This is ignored by the monitored node, which might cause it to be marked down.
HTTP/HTTPS monitor with a send attribute set to 'none'. HTTP/HTTPS monitors with a 'none' send string should complete the TCP handshake(+SSL handshake) and then close the connection without sending any data.
None.
HTTP/HTTPS monitor no longer transmits any L7 data when send attribute is set to 'none'.