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fix: Update iptables/nftables rules for IPv6 #4

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Merged
MikeWang000000 merged 1 commit into from
Jul 29, 2025
Merged

fix: Update iptables/nftables rules for IPv6 #4

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48 changes: 6 additions & 42 deletions src/ipv6ipt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -111,52 +111,16 @@ int fs_ipt6_setup(void)
"--icmp-type", "11", "-j", "DROP", NULL},

/*
exclude special IPv6 addresses (from source)
exclude non-GUA IPv6 addresses (from source)
*/
{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s", "::/127",
"-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"::ffff:0:0/96", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"64:ff9b::/96", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"64:ff9b:1::/48", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"2002::/16", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"fc00::/7", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "-s",
"fe80::/10", "-j", "RETURN", NULL},
{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_S", "!", "-s",
"2000::/3", "-j", "RETURN", NULL},

/*
exclude special IPv6 addresses (to destination)
exclude non-GUA IPv6 addresses (to destination)
*/
{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d", "::/127",
"-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"::ffff:0:0/96", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"64:ff9b::/96", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"64:ff9b:1::/48", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"2002::/16", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"fc00::/7", "-j", "RETURN", NULL},

{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "-d",
"fe80::/10", "-j", "RETURN", NULL},
{"ip6tables", "-w", "-t", "mangle", "-A", "FAKESIP_D", "!", "-d",
"2000::/3", "-j", "RETURN", NULL},

/*
exclude marked packets
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20 changes: 4 additions & 16 deletions src/ipv6nft.c
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Original file line number Diff line number Diff line change
Expand Up @@ -110,30 +110,18 @@ int fs_nft6_setup(void)
*/
" icmp type time-exceeded counter drop;\n"
/*
exclude special IPv6 addresses (from source)
exclude non-GUA IPv6 addresses (from source)
*/
" ip6 saddr ::/127 return;\n"
" ip6 saddr ::ffff:0:0/96 return;\n"
" ip6 saddr 64:ff9b::/96 return;\n"
" ip6 saddr 64:ff9b:1::/48 return;\n"
" ip6 saddr 2002::/16 return;\n"
" ip6 saddr fc00::/7 return;\n"
" ip6 saddr fe80::/10 return;\n"
" ip6 saddr != 2000::/3 return;\n"
" }\n"
"\n"
" chain fs_postrouting {\n"
" type filter hook postrouting priority mangle - 5;\n"
" policy accept;\n"
/*
exclude special IPv6 addresses (to destination)
exclude non-GUA IPv6 addresses (to destination)
*/
" ip6 daddr ::/127 return;\n"
" ip6 daddr ::ffff:0:0/96 return;\n"
" ip6 daddr 64:ff9b::/96 return;\n"
" ip6 daddr 64:ff9b:1::/48 return;\n"
" ip6 daddr 2002::/16 return;\n"
" ip6 daddr fc00::/7 return;\n"
" ip6 daddr fe80::/10 return;\n"
" ip6 daddr != 2000::/3 return;\n"
" }\n"
"\n"
" chain fs_rules {\n"
Expand Down