The PIX Firewall 500 series with software version reboots intermittently with the Dropping TCP packet from inside:xx.x.x.xx/xxx to outside: xx.xxx.xxx.x/xxx, reason: MSS exceeded, MSS xxx, data xxx error message

[TCC_2]

Core issue

The issue is documented in Cisco bug ID CSCsc39334.

Resolution

For a workaround, remove the check-retransmission command from the tcp-map.

As an alternative, upgrade to any of th software versions. Refer to Software Downloads: Cisco PIX Security Appliance Software:

• 7.0(5)
  
  
• 7.2(0.52)
  
  
• 7.3(0.4)
  
  
• 7.0(4.14)
  
  
• 7.1(2.1)