I am currently using the Tails OS and am looking to access websites that don't play friendly with Tor by using the configuration Tor > socks5 proxy.
According to the Tails support the recommended method is to create a SSH tunnel and reconfigure the firewall and browser appropriately. Using SSH I am able to do this perfectly fine, but would like to have access to a far wider pool of publicly available proxies and to this end, am looking to configure proxychains appropriately. The previous question How to chain proxy after Tor relates to proxychains and Tor generally, whereas my problem is Tails specific.
Relevant settings of /etc/proxychains.conf are:
socks5 127.0.0.1 9151
socks5 18.104.22.168 3177 (NB: This IP address has been modified)
Testing with proxychains curl ipecho.net/plain --socks5-hostname 22.214.171.124:3177 shows that proxychains is working fine:
However, running the browser with proxychains iceweasel I'm running into problems.
With default browser settings, I get my Tor IP address. When I manually reconfigure the proxy to point to 126.96.36.199:3177 I get the error message "Proxy server is refusing connections" along with the following error in /var/log/syslog:
Sep 6 11:06:10 localhost kernel: [ 1105.132959] Dropped outbound packet: IN= OUT=wlan0 SRC=192.168.1.3 DST=188.8.131.52 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=31261 DF PROTO=TCP SPT=44153 DPT=3177 WINDOW=29200 RES=0x00 SYN URGP=0 UID=1000 GID=1000
So for one reason or another, the firewall is blocking the connection for the browser, but allowing the curl command through.
Without having a full appreciation of the way that Tails is configured, I'm reluctant to mess with my settings blindly -- any suggestions?