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

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JohnCzerwinski_'s avatar
JohnCzerwinski_
Icon for Nimbostratus rankNimbostratus
Aug 19, 2009

Hosted environment - Multiple VLANs outbound routing

Having an issue where we cannot make outbound connections from the servers behind an F5 BIG-IP LTM. The setup is as follows:       |   | VLAN: 224 (10.22.4.5 / 10.22.4.4   ...
config
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JohnCzerwinski_'s avatar
JohnCzerwinski_
Icon for Nimbostratus rankNimbostratus
Aug 19, 2009
Here's a sample of the tcpdump

 

 

17:44:21.940965 10.0.0.4.1493 > 10.21.4.11.3389: S 3555809265:3555809265(0) win 65535 (DF)

 

17:44:24.734009 10.0.0.4.1493 > 10.21.4.11.3389: S 3555809265:3555809265(0) win 65535 (DF)

 

17:44:30.848677 10.0.0.4.1493 > 10.21.4.11.3389: S 3555809265:3555809265(0) win 65535 (DF)

 

17:44:41.577974 10.0.0.4.1489 > 10.21.4.11.3389: FP 1:29(28) ack 1 win 65535 (DF)