diff options
Diffstat (limited to 'pkg/linux')
| -rwxr-xr-x | pkg/linux/bitmask-root | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/pkg/linux/bitmask-root b/pkg/linux/bitmask-root index 9bd5dfce..82e8799f 100755 --- a/pkg/linux/bitmask-root +++ b/pkg/linux/bitmask-root @@ -653,6 +653,7 @@ def get_local_network_ipv6(device): def run_iptable_with_check(cmd, *args, **options): """ Run an iptables command checking to see if it should: + for --append: run only if rule does not already exist. for --insert: run only if rule does not already exist. for --delete: run only if rule does exist. other commands are run normally. @@ -662,6 +663,11 @@ def run_iptable_with_check(cmd, *args, **options): check_code = run(cmd, *check_args, exitcode=True) if check_code != 0: run(cmd, *args, **options) + elif "--append" in args: + check_args = [arg.replace("--append", "--check") for arg in args] + check_code = run(cmd, *check_args, exitcode=True) + if check_code != 0: + run(cmd, *args, **options) elif "--delete" in args: check_args = [arg.replace("--delete", "--check") for arg in args] check_code = run(cmd, *check_args, exitcode=True) @@ -773,7 +779,7 @@ def firewall_start(args): "--protocol", "udp", "--destination", "FF02::FB", "--dport", "5353", "-o", default_device, "--jump", "RETURN") - # allow traffic to gateways + # allow ipv4 traffic to gateways for gateway in gateways: ip4tables("--append", BITMASK_CHAIN, "--destination", gateway, "-o", default_device, "--jump", "ACCEPT") @@ -783,21 +789,13 @@ def firewall_start(args): iptables("--append", BITMASK_CHAIN, "-o", default_device, "--jump", "LOG", "--log-prefix", "iptables denied: ", "--log-level", "7") - # reject everything else - iptables("--append", BITMASK_CHAIN, "-o", default_device, - "--jump", "REJECT") - - # workaround for ipv6 servers being blocked and not falling back to ipv4. - # See #5693 - ip6tables("--append", "OUTPUT", "--jump", "REJECT", - "-s", "::/0", "-d", "::/0", - "-p", "tcp", - "--reject-with", "icmp6-port-unreachable") - ip6tables("--append", "OUTPUT", "--jump", "REJECT", - "-s", "::/0", "-d", "::/0", - "-p", "udp", - "--reject-with", "icmp6-port-unreachable") + # for now, ensure all other ipv6 packets get rejected (regardless of device) + # (not sure why, but "-p any" doesn't work) + ip6tables("--append", BITMASK_CHAIN, "-p", "tcp", "--jump", "REJECT") + ip6tables("--append", BITMASK_CHAIN, "-p", "udp", "--jump", "REJECT") + # reject all other ipv4 sent over the default device + ip4tables("--append", BITMASK_CHAIN, "-o", default_device, "--jump", "REJECT") def firewall_stop(): """ |