请教：apache出现奇怪日志

edge_11

apache 做双向代理后 出现奇怪日志如下，且流量巨大，关闭双向代理后问题依旧，望高手指教

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4. 10:18:06.564381 IP (tos 0x0, ttl  64, id 52751, offset 0, flags [DF], proto 6, length: 40) 192.168.20.253.http > ns.km31024.keymachine.de.4413: R [tcp sum ok] 0:0(0) ack 2347947453 win 0
   
5. 10:18:06.564455 IP (tos 0x0, ttl  64, id 63297, offset 0, flags [DF], proto 17, length: 73) 192.168.20.253.42244 > ns.shtel.net.cn.domain: [bad udp cksum 9137!]  60425+ PTR? 147.116.118.87.in-addr.arpa. (45)
   
6. 10:18:06.565015 IP (tos 0x0, ttl 249, id 48235, offset 0, flags [DF], proto 17, length: 208) ns.shtel.net.cn.domain > 192.168.20.253.42244:  60425 q: PTR? 147.116.118.87.in-addr.arpa. 1/2/2 147.116.118.87.in-addr.arpa.[|domain]
   
7. 10:18:06.577533 IP (tos 0x0, ttl 106, id 19334, offset 0, flags [DF], proto 6, length: 48) ZJ092100.ppp.dion.ne.jp.3599 > 192.168.20.253.http: S [tcp sum ok] 793766609:793766609(0) win 64240 <mss 1412,nop,nop,sackOK>
   
8. 10:18:06.577540 IP (tos 0x0, ttl  64, id 52752, offset 0, flags [DF], proto 6, length: 40) 192.168.20.253.http > ZJ092100.ppp.dion.ne.jp.3599: R [tcp sum ok] 0:0(0) ack 793766610 win 0
   
9. 10:18:06.577614 IP (tos 0x0, ttl  64, id 63310, offset 0, flags [DF], proto 17, length: 71) 192.168.20.253.42244 > ns.shtel.net.cn.domain: [bad udp cksum bb4f!]  44421+ PTR? 100.92.4.222.in-addr.arpa. (43)
   
10. 10:18:06.599164 IP (tos 0x0, ttl  51, id 53516, offset 0, flags [DF], proto 6, length: 60) 89-149-208-39.internetserviceteam.com.54540 > 192.168.20.253.http: S [tcp sum ok] 1713236943:1713236943(0) win 5840 <mss 1460,sackOK,timestamp 112016067 0,nop,wscale 2>
    
11. 10:18:06.599168 IP (tos 0x0, ttl  64, id 52753, offset 0, flags [DF], proto 6, length: 40) 192.168.20.253.http > 89-149-208-39.internetserviceteam.com.54540: R [tcp sum ok] 0:0(0) ack 1713236944 win 0
    
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