Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

fgf_165674's avatar
fgf_165674
Icon for Nimbostratus rankNimbostratus
Nov 23, 2015

Carriage Return, HTTP Monitor

Hi,   using a HTTP monitor, if I use "\r\n" to get a carriage return, it doesn't work.   For example,   telnet :80 "GET /hello HTTP/1.0" (manual carriage return) -> it works fine, returns a ...
application delivery
big-ip
LTM
nitass's avatar
nitass
Icon for Employee rankEmployee
Nov 24, 2015

this is mine. i am running 12.0.

 monitor

root@(ve11c)(cfg-sync In Sync)(Active)(/Common)(tmos) list ltm monitor http myhttp
ltm monitor http myhttp {
    adaptive disabled
    defaults-from http
    destination *:*
    interval 5
    ip-dscp 0
    send "GET /hello HTTP/1.0\r\n"
    time-until-up 0
    timeout 16
}

 tcpdump

22:47:05.688948 IP 200.200.200.13.56097 > 200.200.200.101.80: Flags [P.], seq 1:24, ack 1, win 115, options [nop,                            nop,TS val 634924596 ecr 491153398], length 23 out slot1/tmm1 lis=
        0x0000:  0ffe 0800 4500 004b 5167 4000 4006 c741  ....E..KQg@.@..A
        0x0010:  c8c8 c80d c8c8 c865 db21 0050 0613 9444  .......e.!.P...D
        0x0020:  e711 c209 8018 0073 2242 0000 0101 080a  .......s"B......
        0x0030:  25d8 2e34 1d46 67f6 4745 5420 2f68 656c  %..4.Fg.GET./hel
        0x0040:  6c6f 2048 5454 502f 312e 300d 0a0d 0a01  lo.HTTP/1.0.....
        0x0050:  0501 0000 0100                           ......