September 2008 - tproxy - lists.balabit.hu

TProxy patch for 2.6.26 and Squid 3.HEAD news
by KOVACS Krisztian 01 Oct '08

01 Oct '08

Hi, During the last few days Balazs and me have been working on getting TProxy 4.1 and Squid3's support for it into a better shape. Balazs has fixed the ICMP issue that was definitely the most important item on our to-do list and I was working with Amos Jeffries from the Squid team to fix problems with Squid's tproxy support. So anyone who had problems with tproxy 4.1 or Squid in the past please give it another try: download the latest snapshot of Squid 3.HEAD from the Squid site (http://www.squid-cache.org/Versions/v3/HEAD/) and our latest snapshot of tproxy (http://people.netfilter.org/hidden/tproxy/tproxy4-2.6.26-200809262032.tar.b…) Also, you can get a patched iptables source from Balazs's git repository (git clone git://git.balabit.hu/bazsi/iptables-tproxy.git) which contains the user-space support for the 'socket' match and the 'TPROXY' target. The Squid wiki has a page on how to configure Squid (http://wiki.squid-cache.org/Features/Tproxy4) as well as a howto (http://wiki.squid-cache.org/ConfigExamples/TPROXYPatchingCentOS) -- KOVACS Krisztian

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Squid support
by Pablo Sebastián Greco 26 Sep '08

26 Sep '08

I've just updated for me, the squid2.7STABLE4 patch based on the squid2.6. Please let me know if it works for you

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tproxy support for iptables > 1.4.0
by Ritter, Nicholas 25 Sep '08

25 Sep '08

Is there tproxy patch support for iptables 1.4.1 and/or 1.4.1.1? I just tried to patch against both and got errors when using the tproxy-iptables-1.4.0-20080521-113954-1211362794.patch <http://www.balabit.com/downloads/files/tproxy/tproxy-iptables-1.4.0-200 80521-113954-1211362794.patch> patch file.

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Inclusion of tproxy 4.x in mainline kernel
by Igmar Palsenberg 25 Sep '08

25 Sep '08

Hi, Is there a TODO list that lists what is keeping tproxy from beeing included in the mainline kernel ? It's features are quite usefull, and inclusion in a vanilla kernel saves us a whole lot of manual patching :) Regards, Igmar

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port=0 ERROR ASSIGN
by Richard Smith 23 Sep '08

23 Sep '08

Hello Guys, Sorry i'm late, but recently set up a squid on a debian box patched with tproxy and compiled iptables like you did and everything seems woking except this error message on the cache log about the "port=0 ERROR ASSIGN". tproxy ip=179.166.10.3,0x3017477,port=0 ERROR ASSIGN can't connect to the outside if the tproxy iptables rules loaded. Googled for some answer but no succes. If this issue is solved any kind of help would be much appreciated, Thanks and more power.

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Tproxy 4 bugs after installation
by Ayham Abou Afach 12 Sep '08

12 Sep '08

Hi Every body i have some problems with tproxy after installation on ubuntu server 8.04 AMD 64 with the following : Iptables 1.4.0 squid-3.HEAD-20080901 tproxy-iptables-1.4.0-20080521-113954-1211362794.patch tproxy-kernel-2.6.25-20080519-165031-1211208631 Kernel 2.6.24.19 with the following rules file for iptables : *mangle :PREROUTING ACCEPT [263600:125723686] :INPUT ACCEPT [616826:343701577] :FORWARD ACCEPT [239812:121581975] :OUTPUT ACCEPT [1011781:458569186] :POSTROUTING ACCEPT [1250543:580095901] :DIVERT - [0:0] -A PREROUTING -p tcp -m tcp --dport 80 -j TPROXY --on-port 8080 --on-ip 0.0.0.0 --tproxy-mark 0x1/0x1 -A PREROUTING -p tcp -m socket -j DIVERT -A DIVERT -j MARK --set-mark 0x1 -A DIVERT -j ACCEPT COMMIT and the following ip rules : ip rule add fwmark 1 lookup 100 ip route add local 0.0.0.0/0 dev lo table 100 and enabling nonlocal bind echo 1 > /proc/sys/net/ipv4/ip_nonlocal_bind And with squid configuration http_port 8080 transparent tproxy And every thing is fine all users are going out with their own IP addresses and that what i want but there is some problems with post pages and some get ones i see these errors in squid cache.log : IPInterception.cc(137) NetfilterInterception: NF getsockopt(SO_ORIGINAL_DST) failed: (11) Resource temporarily unavailable commBind: Cannot bind socket FD 60 to 192.168.0.2:4288: (98) Address already in use and this error in my explorer : * Connection to www.yahoo.com failed.* The system returned: /(99) Cannot assign requested address / any body has some about this case HELP please

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A connection to a server gets long time (3 seconds) (tproxy4)
by 박영호 11 Sep '08

11 Sep '08

I has a problem with tproxy4 on linux kernel 2.6.24.7 the connection to a server(172.16.100.232) with foreign address(10.0.3.232) get long time(3 seconds) because a syn packet re-sent by tproxy server. (syn retry time may be 3-seconds) (first web server syn-ack packet may be ignored by tproxy.) what I do for this problem? below is the result of server-side tcpdump . tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth3, link-type EN10MB (Ethernet), capture size 96 bytes 22:23:45.739972 IP 10.0.3.232.3845 > 172.16.100.142.http: S 3133342350:3133342350(0) win 5840 <mss 1460,sackOK,timestamp 4475642 0,nop,wscale 9> 22:23:45.744947 IP 172.16.100.142.http > 10.0.3.232.3845: S 1184231461:1184231461(0) ack 3133342351 win 5792 <mss 1460,sackOK,timestamp 184168973 4475642,nop,wscale 7> 22:23:48.740436 IP 10.0.3.232.3845 > 172.16.100.142.http: S 3133342350:3133342350(0) win 5840 <mss 1460,sackOK,timestamp 4476392 0,nop,wscale 9> 22:23:48.740453 IP 172.16.100.142.http > 10.0.3.232.3845: S 1184231461:1184231461(0) ack 3133342351 win 5792 <mss 1460,sackOK,timestamp 184169723 4475642,nop,wscale 7> 22:23:49.537982 IP 172.16.100.142.http > 10.0.3.232.3845: S 1184231461:1184231461(0) ack 3133342351 win 5792 <mss 1460,sackOK,timestamp 184169923 4475642,nop,wscale 7> 22:23:49.538478 IP 10.0.3.232.3845 > 172.16.100.142.http: . ack 1 win 12 <nop,nop,timestamp 4476591 184169923> 22:23:49.538716 IP 10.0.3.232.3845 > 172.16.100.142.http: P 1:6(5) ack 1 win 12 <nop,nop,timestamp 4476591 184169923> 22:23:49.538730 IP 172.16.100.142.http > 10.0.3.232.3845: . ack 6 win 46 <nop,nop,timestamp 184169923 4476591> 22:23:49.539463 IP 172.16.100.142.http > 10.0.3.232.3845: P 1:98(97) ack 6 win 46 <nop,nop,timestamp 184169923 4476591> 22:23:49.539509 IP 172.16.100.142.http > 10.0.3.232.3845: F 98:98(0) ack 6 win 46 <nop,nop,timestamp 184169923 4476591> 22:23:49.539793 IP 10.0.3.232.3845 > 172.16.100.142.http: . ack 98 win 12 <nop,nop,timestamp 4476591 184169923> 22:23:49.540470 IP 10.0.3.232.3845 > 172.16.100.142.http: F 6:6(0) ack 99 win 12 <nop,nop,timestamp 4476591 184169923> 22:23:49.540483 IP 172.16.100.142.http > 10.0.3.232.3845: . ack 7 win 46 <nop,nop,timestamp 184169923 4476591> here is the result of lsmod bash-3.1# lsmod Module Size Used by Not tainted iptable_nat 5764 1 nf_nat_sip 4352 0 nf_nat_h323 6400 0 nf_nat_pptp 3200 0 nf_nat_proto_gre 2436 1 nf_nat_pptp nf_nat_ftp 2944 0 nf_nat 15020 6 iptable_nat,nf_nat_sip,nf_nat_h323,nf_nat_pptp,nf_nat_proto_gre,nf_nat_ftp xt_TPROXY 2688 1 xt_socket 2944 1 xt_MARK 2304 1 nf_tproxy_core 3712 2 xt_TPROXY,xt_socket,[permanent] iptable_mangle 2560 1 xt_CONNMARK 2560 0 iptable_filter 2432 1 ip_tables 10452 3 iptable_nat,iptable_mangle,iptable_filter nf_hipac 156168 0 noarp 20780 0 e100 29964 0 e1000 170688 0 iptables -t mangle -L Chain PREROUTING (policy ACCEPT) target prot opt source destination DIVERT tcp -- anywhere anywhere socket TPROXY tcp -- anywhere anywhere tcp dpt:http TPROXY redirect 0.0.0.0:80mark 0x1/0x1 Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain DIVERT (1 references) target prot opt source destination MARK all -- anywhere anywhere MARK set 0x1 ACCEPT all -- anywhere anywhere

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Install tproxy
by Joaquim Petiz 01 Sep '08

01 Sep '08

Hi list, I have problems for install squid+tproxy on CentOS 5.2. I using README.txt from balabit.com but not working, connections not register in access.log but in tcpdump on gateway register traffic. My topology: Link <> GW <> Tproxy <> Server Connections from Server register in tcpdump in the GW, access.log in the Tproxy not... CentOS 5.2 Iptables 1.4.0 squid-3.HEAD-20080831 tproxy-iptables-1.4.0-20080521-113954-1211362794.patch tproxy-kernel-2.6.25-20080519-165031-1211208631 Kernel 2.6.25.11 iptables -t mangle -nL Chain PREROUTING (policy ACCEPT) target prot opt source destination DIVERT tcp -- 0.0.0.0/0 0.0.0.0/0 socket TPROXY tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 TPROXY redirect 0.0.0.0:50080 mark 0x1/0x1 Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain DIVERT (1 references) target prot opt source destination MARK all -- 0.0.0.0/0 0.0.0.0/0 MARK set 0x1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ip rule sh 0: from all lookup 255 32765: from all fwmark 0x1 lookup 100 32766: from all lookup main 32767: from all lookup default ip route sh table 100 local default dev lo scope host squid.conf http_port 50080 transparent tproxy cache_dir ufs /cache 100 16 256 access_log /var/logs/access.log squid visible_hostname tproxy acl manager proto cache_object acl localhost src 127.0.0.1/32 acl to_localhost dst 127.0.0.0/8 acl localnet src 10.0.0.0/8 # RFC1918 possible internal network acl localnet src 172.16.0.0/12 # RFC1918 possible internal network acl localnet src 192.168.0.0/16 # RFC1918 possible internal network acl ALL2 src 192.168.0.0/16 acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow all http_access allow ALL2 http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localnet http_access deny all icp_access allow localnet icp_access deny all htcp_access allow localnet htcp_access deny all hierarchy_stoplist cgi-bin ? refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 4320 icp_port 3130 error_directory /usr/share/errors/en coredump_dir /var/cache Novos endereços, o Yahoo! que você conhece. Crie um email novo com a sua cara @ymail.com ou @rocketmail.com. http://br.new.mail.yahoo.com/addresses

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