iRule TCL error - no such variable

Your variable

content

is set inside of the

if

statement starting on line 25, so if the

if

statement returns false for one of the 5 elements you are checking then the line

binary scan [TCP::payload] H300 content

will now be executed and so no

content

variable.

You can check to see if the

content

variable exists before the

class match

command by using the following line for your

if

statement on line 67:

if {($tls_servername equals "") || ([class match $tls_servername contains "DG_SWG_SSL_Passthrough_Clients_FQDN"]) || ([info exists content] && [class match $content contains "DG_TLS_1_3_Hex_List"] == 0)} {