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satish_txt_2254's avatar
satish_txt_2254
Icon for Cirrus rankCirrus
Apr 30, 2017

tcp_tw_recycle with SNAT

We have very high volume of 

TIME_WAIT
and we are planning to use 
tcp_tw_recycle
TCP setting on Apache Web server so we trash connection faster but many folks saying it will create issue with 
NAT
so before enable i need expert advice should it be safe it to use with LTM (SNAT)?

application delivery
BIG-IP
LTM
snat automap

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  • JG's avatar
    JG
    Icon for Cumulonimbus rankCumulonimbus
    May 01, 2017

    Not directly answering your question, but I'd think the best approach might be to find out why you have so many connections in this state in the first place. More often than not, it is the Apache server that is configured to disable HTTP "KeepAlive" by default that is the cause of this phenomenon. Enabling "KeepAlive", together with a OneConnect profile for the virtual server on the F5, would see the problem go away.