$ ip route show
default via 8.13.140.14 dev bond0.212 proto static
1.21.213.0/24 dev bond0.213 proto kernel scope link src 1.21.213.1
8.11.39.248/30 dev enx00e04c3600d3 proto kernel scope link src 8.11.39.250
8.13.140.0/28 dev bond0.212 proto kernel scope link src 8.13.140.1
8.13.144.0/20 via 1.21.213.254 dev bond0.213
8.13.148.1 via 1.21.213.254 dev bond0.213
##
It's important to see the relevant routing table.
The linux Kernel have couple routing tables which each can contain different routing/forwarding table.
If you want to understand a bit more you might be able to try and lookup for FIB.
( take a peek at: http://linux-ip.net/html/routing-tables.html)
Eliezer
-----Original Message-----
From: Ben Goz <ben.goz87@xxxxxxxxx>
Sent: Wednesday, July 7, 2021 3:36 PM
To: Eliezer Croitoru <ngtech1ltd@xxxxxxxxx>; squid-users@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: TPROXY Error
By the help of God.
Hi Eliezer,
Thanks for your help.
Please let me know if you need more information.
Regards,
Ben
On 07/07/2021 14:01, Eliezer Croitoru wrote:
Hey Ben,
I want to try and reset this issue because I am missing some technical
details.
1. What Linux Distro and what version are you using?'
Ubuntu 20.04
2. the output of 'ip address'
$ ip address
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens1f0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq
master bond0 state UP group default qlen 1000
link/ether ba:59:58:58:23:2b brd ff:ff:ff:ff:ff:ff
3: ens1f1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq
master bond0 state UP group default qlen 1000
link/ether ba:59:58:58:23:2b brd ff:ff:ff:ff:ff:ff
4: usb0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group
default qlen 1000
link/ether ca:13:59:65:c2:56 brd ff:ff:ff:ff:ff:ff
5: enx00e04c3600d3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
fq_codel state UP group default qlen 1000
link/ether 00:e0:4c:36:00:d3 brd ff:ff:ff:ff:ff:ff
inet 8.11.39.250/30 brd 8.11.39.251 scope global enx00e04c3600d3
valid_lft forever preferred_lft forever
inet6 fe80::2e0:4cff:fe36:d3/64 scope link
valid_lft forever preferred_lft forever
6: bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP group default qlen 1000
link/ether ba:59:58:58:23:2b brd ff:ff:ff:ff:ff:ff
inet6 fe80::b859:58ff:fe58:232b/64 scope link
valid_lft forever preferred_lft forever
7: bond0.212@bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP group default qlen 1000
link/ether ba:59:58:58:23:2b brd ff:ff:ff:ff:ff:ff
inet 8.13.140.1/28 brd 8.13.140.15 scope global bond0.212
valid_lft forever preferred_lft forever
inet6 fe80::b859:58ff:fe58:232b/64 scope link
valid_lft forever preferred_lft forever
8: bond0.213@bond0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP group default qlen 1000
link/ether ba:59:58:58:23:2b brd ff:ff:ff:ff:ff:ff
inet 1.21.213.1/24 brd 1.21.213.255 scope global bond0.213
valid_lft forever preferred_lft forever
inet6 fe80::b859:58ff:fe58:232b/64 scope link
valid_lft forever preferred_lft forever
3. the output of 'ip rule'
$ ip rule
0: from all lookup local
32762: from all fwmark 0x1 lookup 100
32763: from all fwmark 0x1 lookup 100
32764: from all fwmark 0x1 lookup 100
32765: from all fwmark 0x1 lookup 100
32766: from all lookup main
32767: from all lookup default
4. the output of 'ip route show'
$ ip route show
default via 8.13.140.14 dev bond0.212 proto static
1.21.213.0/24 dev bond0.213 proto kernel scope link src 1.21.213.1
8.11.39.248/30 dev enx00e04c3600d3 proto kernel scope link src 8.11.39.250
8.13.140.0/28 dev bond0.212 proto kernel scope link src 8.13.140.1
8.13.144.0/20 via 1.21.213.254 dev bond0.213
8.13.148.1 via 1.21.213.254 dev bond0.213
5. the output of 'ip route show table 100'
$ ip route show
default via 8.13.140.14 dev bond0.212 proto static
1.21.213.0/24 dev bond0.213 proto kernel scope link src 1.21.213.1
8.11.39.248/30 dev enx00e04c3600d3 proto kernel scope link src 8.11.39.250
8.13.140.0/28 dev bond0.212 proto kernel scope link src 8.13.140.1
8.13.144.0/20 via 1.21.213.254 dev bond0.213
8.13.148.1 via 1.21.213.254 dev bond0.213
6. the output of 'iptables-save'
$ sudo iptables-save
# Generated by iptables-save v1.8.4 on Wed Jul 7 12:25:05 2021
*mangle
:PREROUTING ACCEPT [72898710:6084386298]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:DIVERT - [0:0]
-A PREROUTING -p tcp -m socket -j DIVERT
-A PREROUTING -i bond0.213 -p tcp -m tcp --dport 80 -j TPROXY --on-port
15644 --on-ip 0.0.0.0 --tproxy-mark 0x1/0x1
-A PREROUTING -i bond0.213 -p tcp -m tcp --dport 443 -j TPROXY --on-port
15645 --on-ip 0.0.0.0 --tproxy-mark 0x1/0x1
-A INPUT -j ACCEPT
-A FORWARD -j ACCEPT
-A OUTPUT -j ACCEPT
-A POSTROUTING -j ACCEPT
-A DIVERT -j MARK --set-xmark 0x1/0xffffffff
-A DIVERT -j ACCEPT
COMMIT
# Completed on Wed Jul 7 12:25:05 2021
# Generated by iptables-save v1.8.4 on Wed Jul 7 12:25:05 2021
*nat
:PREROUTING ACCEPT [26338415:1392747531]
:INPUT ACCEPT [820462:44161193]
:OUTPUT ACCEPT [1053:92773]
:POSTROUTING ACCEPT [25514534:1348449899]
-A PREROUTING -i eth1 -p udp -m udp --dport 53 -j REDIRECT --to-ports 53
-A PREROUTING -i eth1 -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 53
COMMIT
# Completed on Wed Jul 7 12:25:05 2021
# Generated by iptables-save v1.8.4 on Wed Jul 7 12:25:05 2021
*filter
:INPUT ACCEPT [5045387:2170630036]
:FORWARD ACCEPT [72544426:6194710400]
:OUTPUT ACCEPT [2471930:252759773]
COMMIT
# Completed on Wed Jul 7 12:25:05 20
7. the output of 'nft -nn list ruleset' (if exists on the OS)
Doesn't exists.
8. the output of your squid.conf
$ cat squid.conf
#
# Recommended minimum configuration:
#
# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 0.0.0.1-0.255.255.255 # RFC 1122 "this" network (LAN)
acl localnet src 10.0.0.0/8 # RFC 1918 local private network (LAN)
acl localnet src 100.64.0.0/10 # RFC 6598 shared address space (CGN)
acl localnet src 169.254.0.0/16 # RFC 3927 link-local (directly
plugged) machines
acl localnet src 172.16.0.0/12 # RFC 1918 local private network (LAN)
acl localnet src 192.168.0.0/16 # RFC 1918 local private network
(LAN)
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly
plugged) machines
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
#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports
# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports
# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager
# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on "localhost" is a local user
#http_access deny to_localhost
#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost
# And finally deny all other access to this proxy
#http_access deny all
http_access allow all
# Squid normally listens to port 3128
http_port 15643
http_port 15644 tproxy
https_port 15645 ssl-bump tproxy generate-host-certificates=on
options=ALL dynamic_cert_mem_cache_size=4MB
cert=/usr/local/squid/etc/ssl_cert/myCA.pem
dhparams=/usr/local/squid/etc/dhparam.pem
always_direct allow all
acl DiscoverSNIHost at_step SslBump1
acl NoSSLInterceptRegexp_always ssl::server_name_regex -i xxx
acl NoSSLIntercept ssl::server_name "xxx"
acl NoSSLInterceptRegexp ssl::server_name_regex -i "xxx"
ssl_bump splice NoSSLInterceptRegexp_always
ssl_bump splice NoSSLIntercept
ssl_bump splice NoSSLInterceptRegexp
ssl_bump peek DiscoverSNIHost
ssl_bump bump all
sslcrtd_program /usr/local/squid/libexec/security_file_certgen -s
/var/lib/ssl_db -M 4MB
sslcrtd_children 32 startup=15 idle=3
#sslproxy_capath /etc/ssl/certs
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /usr/local/squid/var/cache/squid 100 16 256
# Leave coredumps in the first cache dir
coredump_dir /usr/local/squid/var/cache/squid
#
# Add any of your own refresh_pattern entries above these.
#
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
range_offset_limit -1
dns_v4_first on
forwarded_for off
cache deny all
9. the output of 'squid -v'
$ ./squid -v
Squid Cache: Version 4.15
Service Name: squid
This binary uses OpenSSL 1.1.1f 31 Mar 2020. For legal restrictions on
distribution see https://www.openssl.org/source/license.html
configure options: '--with-openssl' '--enable-ssl-crtd' '--enable-ecap'
'--enable-linux-netfilter' --enable-ltdl-convenience
10. the output of 'uname -a'
uname -a
Linux xxx 5.4.0-77-generic #86-Ubuntu SMP Thu Jun 17 02:35:03 UTC 2021
x86_64 x86_64 x86_64 GNU/Linux
Once we will have all the above details (reducing/modifying any private
details) we can try to maybe help you.
Eliezer
-----Original Message-----
From: squid-users <squid-users-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of
Ben Goz
Sent: Wednesday, June 30, 2021 3:16 PM
To: squid-users@xxxxxxxxxxxxxxxxxxxxx
Subject: TPROXY Error
By the help of God.
Hi All,
I'm trying to configure squid as a transparent proxy using TPROXY.
The machine I'm using has 2 NICs, one for input and the other one for
output traffic.
The TPROXY iptables rules are configured on the input NIC.
It looks like iptables TPROXY redirect works but squid prints out the
following error:
ERROR: NAT/TPROXY lookup failed to locate original IPs on
local=xxx:443 remote=xxx:49471 FD 14 flags=17
I think I loaded all TPROXY required kernel modules.
The ip forwarding works fine without the iptables rules. and I don't
see any squid ERROR on getsockopt
Please let me know what I'm missing?
Thanks,
Ben
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