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Unable to maintain keep alive connection while using burp suite

Jatin | Last updated: Nov 29, 2019 01:25PM UTC

Hi, I am trying to test a webapp for vulnerabilities. I am using keep alive connections for my app's functioning, it works fine when i am not using burp as a proxy. But i am unable to maintain keep alive connections when using burp. Plese suggest any way to maintain a keep alive connection using burp.

Mike, PortSwigger Agent | Last updated: Dec 02, 2019 11:03AM UTC

Hi Jatin, inside Proxy > Options > Miscellaneous, do you have 'Set 'Connection Close' on incoming requests' enabled? Burp Suite is set by default to automatically close connections as this can often have performance benefits.

Burp User | Last updated: Dec 05, 2019 06:15AM UTC

Hi Mike, I have already tried that but that didn't work in my case.

Mike, PortSwigger Agent | Last updated: Dec 05, 2019 01:31PM UTC

Hi Jatin, I have just spoken to our Burp Suite development team. Burp Suite will automatically close connections when proxying traffic as it provides significant performance and reliability benefits. The setting I referred to previously will stop Burp from injecting a 'Connection: close' header when proxying traffic which can help in certain scenarios, however, it doesn't prevent it from closing the connection.

Burp User | Last updated: Dec 09, 2019 07:44AM UTC

Hi Mike, there must be any particular timeout after which burp closes the connection isn't it ? So, is there any way that i can keep-alive my connection for any period of time like 5 minutes, so that i can test my app's functionalities in that time span.

Mike, PortSwigger Agent | Last updated: Dec 10, 2019 09:47AM UTC