How to specify server by DOMAIN PORT not IP PORT?

[xieranmaya]

I'm having a server with a dynamic IP address(ADSL) and a DDNS configured for it, thus I need to use DOMAIN to specify the server, any way?

[rofl0r]

yes, you write a script that resolves the host and then creates a proxychains.conf from a template like this:

#!/bin/sh
# proxychains wrapper
PROXY_DNS=foobar.com
PROXY_PORT=1080
PROXY_IP=$(host $PROXY_DNS | tail -n 1 | awk '{n=split($0, a, " "); print a[n];}')
conf=/tmp/pxc4.conf.$$
cat << EOF > $conf
strict_chain
proxy_dns
remote_dns_subnet 224
tcp_read_time_out 15000
tcp_connect_time_out 8000
[ProxyList]
EOF
echo "socks5 $PROXY_IP $PROXY_PORT" >> $conf
trap "rm -f $conf" INT TERM
proxychains4 -f "$conf" "$@"
ec="$?"
rm -f "$conf"
return "$ec"

[gemmax]

when i run the script, it occurs:
Usage: proxychains4 -q -f config_file program_name [arguments]
-q makes proxychains quiet - this overrides the config setting
-f allows one to manually specify a configfile to use
for example : proxychains telnet somehost.com
More help in README file

what should i do?

[rofl0r]

did you pass parameters ? usage is like sh script.sh curl ifconfig.me

if it still doesn't work use sh -x instead of sh and paste the output here

[Justsoos]

to @rofl0r , but shell script is very unreliable, such like:

$ host g.www.ms.akadns.net
g.www.ms.akadns.net is an alias for lb1.www.ms.akadns.net.
lb1.www.ms.akadns.net has address 13.75.118.214

the alias will cause error of host command, and also to multi-line output of some domainname by cut command.
I will try to write a proxychains wrapper, upload later.

[rofl0r]

@Justsoos see above, i fixed the host command, should work now (i wrote the above script "blind", without ever running it)

[Justsoos]

@rofl0r :D still the obviurs bug PROXY_DNS=foobar.com & host $PROXYDNS, too old to be programmer la ~ :p

[rofl0r]

@Justsoos fixed. can you confirm it works now ?

[Justsoos]

so, that is what I need:

• three more profiles choosed by param -1, -2, -3, and so on
• no param means default proxy profile
• appointed manually by -n IP(hostname，Node‘s first letter):port -p Protocol
• support IPv6
• support hostname or IP input, use getent but host to resolve hostname (host will RDNS ip address)

suggest setting system alias like:
alias p='/home/your_path/p.sh'
and then you could run proxychains with ease like:
$p curl ipinfo.io
or
$p -1 curl ipinfo.io
or
$p -n 1.1.1.1:1080 -p socks5 curl ipinfo.io

thx @rofl0r, this script will be maintained at here https://gist.github.com/Justsoos/8c06f2df7b7c1b01749c19fe598e1e11

#!/bin/sh
# proxychains wrapper
# Choose pre-supposed profile with -1,-2,-3 OR appoint by -n proxy(Node)_ip(hostname):port and -p proxy_protocol and -q as quiet mode

# Default profile
proxy_hostname=127.0.0.1
proxy_port=1080
protocol=socks5
# profile 1
proxy_hostname_1=127.0.0.1
proxy_port_1=9999
protocol_1=socks5
# profile 2
proxy_hostname_2=SomeProxySite.com
proxy_port_2=443
protocol_2=https
# profile 3
proxy_hostname_3=SomeProxySite.com
proxy_port_3=8080
protocol_3=http

quiet=""

while getopts :n:p:q123 opt
do
    case $opt in
        1)
            # profile 1
            proxy_hostname=$proxy_hostname_1
            proxy_port=$proxy_port_1
            protocol=$protocol_1
            ;;
        2)
            # profile 2
            proxy_hostname=$proxy_hostname_2
            proxy_port=$proxy_port_2
            protocol=$protocol_2
            ;;
        3)
            # profile 3
            proxy_hostname=$proxy_hostname_3
            proxy_port=$proxy_port_3
            protocol=$protocol_3
            ;;
        n)
            # appointed proxy hostname & port
            proxy_port=$(echo $OPTARG | awk -F ':' '{print $(NF)}')
            # remove [] of IPv6
            proxy_hostname=$(echo $OPTARG | sed "s/:$proxy_port//g" | sed "s/\[//g" | sed "s/\]//g")
            ;;
        p)
            # appointed proxy protocol
            protocol=$OPTARG
            ;;
        q)
            # quiet
            quiet=" -q "
            ;;
        :)
            ;;
    esac
done
shift "$((OPTIND-1))"
# echo "$proxy_hostname $proxy_port $protocol"
proxy_ip=$(getent hosts $proxy_hostname | head -n1 | cut -d " " -f1)
[ -z $proxy_ip ] && proxy_ip=$proxy_hostname
# echo "$proxy_ip"
# echo "$@"
# echo "$OPTIND"
# echo "$quiet"
# echo $$
conf=/tmp/proxychains4.conf.$UID.$$
cat << EOF > $conf
strict_chain
proxy_dns
remote_dns_subnet 224
tcp_read_time_out 15000
tcp_connect_time_out 8000
[ProxyList]
EOF
echo "$protocol $proxy_ip $proxy_port" >> $conf
trap "rm -f $conf" INT TERM
para=${quiet}" -f "${conf}" "${@}
# echo $para
proxychains4 $para
ec="$?"
rm -f "$conf"
exit "$ec"

[philipppaul-adh]

Hi,
I have kind of similar problem but in my case I have a squid proxy in front of me which has a whitelist. The whitelist already contains the dns name of the second proxy but does not allow HTTP CONNECT to non whitelisted IPs or DNS names.

So

nc -v internal.first.proxy.somewhere 8888
CONNECT external.second.proxy.somewhere:8888 HTTP/1.1
Host: external.second.proxy.somewhere:22225

works fine, whereas:

nc -v internal.first.proxy.somewhere 8888
CONNECT  1.1.1.1:8888 HTTP/1.1

does not (Permission denied). Unfortunately your workaround does not solve this problem.
Do you have an idea how to fix this besides rewriting the tool?

Regards