While serving a lot of WAP / Mobile Based content, nginx is throwing up a lot of HTTP 400 errors. Also connection refused upstream is coming a lot!

* 2008/07/29 10:43:46 [info] 20025#0: *32822441 client sent invalid header line: "x-nokia.wia.accept.original: text/javascript,text/ecmascript,application/x-ja vascript,*/*,text/x-vCard,text/x-vCalendar,image/gif,image/vnd.wap.wbmp" while reading client request headers, client: 125.18.235.215, server: whatever.com, r equest: "GET /ad/ad_picture/1085/167this.jpg HTTP/1.1", host: " www.whatever.com" 2008/07/29 10:43:48 [info] 20025#0: *32822483 client sent invalid request while reading client request line, client: 69.64.49.234, server: whatever.com, reque st: "GET /waphandler?cid=14131C047A5041424257475C4657455C8D8F&ua=SPICE-S808%2FWAP+Browser&ip=ip_zest&mt=Insert relevant metadata here&request=impression HTTP /1.0" 2008/07/29 10:43:53 [info] 20025#0: *32822606 client sent invalid header line: "X-Nokia-CONNECTION_MODE: CMODE" while reading client request headers, client: 203.145.131.148, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:43:53 [info] 20025#0: *32822606 client sent invalid header line: "X-Nokia-GATEWAY_ID: NWG/4.1/Build104" while reading client request headers, c lient: 203.145.131.148, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:43:53 [info] 20025#0: *32822606 client sent invalid header line: "x-nokia.wia.accept.original: image/jpeg,*/*,text/x-vCard,text/x-vCalendar,ima ge/gif,image/vnd.wap.wbmp" while reading client request headers, client: 203.145.131.148, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36 .jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:43:55 [error] 20025#0: *32822647 connect() failed (111: Connection refused) while connecting to upstream, client: 67.212.160.90, server: zestad z.com, request: "GET /waphandler?cid=14131C047A504142455844554756465A8F89&ua=Mozilla%2F4.0+%28compatible%3B+MSIE+6.0%3B+Symbian+OS%3B+Nokia+3230%2F5.0604.0%3 B+9399%29+Opera+8.65+%5Ben%5D&ip=117.99.58.93&mt=symbian&request=impression HTTP/1.0", upstream: " http://192.168.1.3:9003/waphandler?cid=14131C047A5041424558 44554756465A8F89&ua=Mozilla%2F4.0+%28compatible%3B+MSIE+6.0%3B+Symbian+OS%3B+Nokia+3230%2F5.0604.0%3B+9399%29+Opera+8.65+%5Ben%5D&ip= 117.99.58.93&mt=symbian& request=impression", host: "www.whatever.com" 2008/07/29 10:43:55 [error] 20025#0: *32822647 connect() failed (111: Connection refused) while connecting to upstream, client: 67.212.160.90, server: zestad z.com, request: "GET /waphandler?cid=14131C047A504142455844554756465A8F89&ua=Mozilla%2F4.0+%28compatible%3B+MSIE+6.0%3B+Symbian+OS%3B+Nokia+3230%2F5.0604.0%3 B+9399%29+Opera+8.65+%5Ben%5D&ip=117.99.58.93&mt=symbian&request=impression HTTP/1.0", upstream: " http://192.168.1.3:9004/waphandler?cid=14131C047A5041424558 44554756465A8F89&ua=Mozilla%2F4.0+%28compatible%3B+MSIE+6.0%3B+Symbian+OS%3B+Nokia+3230%2F5.0604.0%3B+9399%29+Opera+8.65+%5Ben%5D&ip= 117.99.58.93&mt=symbian& request=impression", host: "www.whatever.com" 2008/07/29 10:44:03 [info] 20025#0: *32822864 client sent invalid header line: "X-Nokia-CONNECTION_MODE: CMODE" while reading client request headers, client: 203.145.134.213, server: whatever.com, request: "GET /ad/ad_picture/1094/hashar_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:44:03 [info] 20025#0: *32822864 client sent invalid header line: "X-Nokia-GATEWAY_ID: NWG/4.1/Build101" while reading client request headers, c lient: 203.145.134.213, server: whatever.com, request: "GET /ad/ad_picture/1094/hashar_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:44:03 [info] 20025#0: *32822864 client sent invalid header line: "x-nokia.wia.accept.original: application/vnd.wap.connectivity-wbxml,applicati on/vnd.wap.wmlc,application/vnd.wap.wmlscriptc,image/vnd.wap.wbmp,image/gif,image/jpeg,image/png,image/bmp,application/xhtml+xml,application/vnd.wap.xhtml+xm l,text/html,text/css,application/vnd.wap.mms-message,application/vnd.wap.sic,audio/midi,audio/sp-midi,audio/mid,audio/imelody,text/x-imelody,application/vnd. oma.drm.message,application/vnd.oma.drm.content,application/vnd.oma.drm.rights+xml,application/vnd.oma.drm.rights+wbxml,text/x-vCard,text/x-vCalendar" while reading client request headers, client: 203.145.134.213, server: whatever.com, request: "GET /ad/ad_picture/1094/hashar_216x36.jpg HTTP/1.1", host: "www.zesta dz.com" 2008/07/29 10:44:06 [info] 20025#0: *32822926 client sent invalid header line: "X-Nokia-CONNECTION_MODE: TCP" while reading client request headers, client: 1 25.18.235.215, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:44:06 [info] 20025#0: *32822926 client sent invalid header line: "X-Nokia-GATEWAY_ID: NWG/4.1/Build104" while reading client request headers, c lient: 125.18.235.215, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:44:06 [info] 20025#0: *32822926 client sent invalid header line: "x-nokia.wia.accept.original: image/vnd.wap.wbmp,image/gif,image/jpg,image/jpe g,image/png,image/bmp,image/x-bmp,text/x-vCard,text/x-vCalendar" while reading client request headers, client: 125.18.235.215, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com " 2008/07/29 10:44:06 [info] 20025#0: *32822929 client sent invalid header line: "X-Nokia-CONNECTION_MODE: TCP" while reading client request headers, client: 2 03.145.131.148, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com" 2008/07/29 10:44:06 [info] 20025#0: *32822929 client sent invalid header line: "X-Nokia-GATEWAY_ID: NWG/4.1/Build104" while reading client request headers, c lient: 203.145.131.148, server: whatever.com, request: "GET /ad/ad_picture/1091/top10_216x36.jpg HTTP/1.1", host: "www.whatever.com"*

Can someone suggest what are these errors and suggest resolution.

Thanks for the replies

Asif