> Source: [sk108294](https://support.checkpoint.com/results/sk/sk108294)

# sk108294 - Probe Bypass is initiated on non-SSL connection

| Property | Value |
|----------|-------|
| Solution ID | sk108294 |
| Date Created | 2015-10-21 |
| Last Modified | 2019-03-12 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |
| OS | Gaia |

## Symptoms

- * With HTTPS Inspection enabled, the application using non-standard port for HTTP connection, causes the [Probe Bypass](http://supportcontent.checkpoint.com/solutions?id=sk104717) feature to run on the connection, resulting in holding SYN until it times out.  

* Kernel debug shows that port of the connection is not 443 but 8080:   

  `fwconn_lookup: conn <dir 0, 192.168.10.159:14125 -> 166.125.252.208:8080 IPP 6>;`   

  Then rulebase returned possible match and feature is enabled:   

  `PID:{ssl_insp} fw_https_inspection_exe_rulebase_SYN_ex: rulebase match returned: POSSIBLE;`  
  `
  PID:{ssl_insp} fw_https_inspection_exe_rulebase_SYN_ex: status is 'POSSIBLE';`  
  `
  PID:{ssl_insp} fw_https_inspection_exe_rulebase_SYN_ex: _chain->packetid = 148692520;`  
  `
  PID:{ssl_insp} fw_https_inspection_exe_rulebase_SYN_ex: found = 0;`  
  `
  PID:{ssl_insp} fw_https_inspection_exe_rulebase_SYN_ex: enhanced_ssl_inspection = 1;`   

  Then SYN packet put on HOLD:   

  `fw_handle_first_packet: Rulebase returned HOLD;`  
  `
  fw_handle_first_packet: match on rule 1;`  
  `
  fw_rule_count_count: counting one more connection on rule 1 (total 31563);`  
  `
  fw_service_count_count: not counting service since service count is disabled;`  
  `
  fw_filter_chain: handle_first_packet returned action HOLD for new conn;`  
  `
  fw_filter_chain: Final switch, action=HOLD;`   

* With `enhanced_ssl_inspection` property set to 0, problem does not happen.

## Solution

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