| 1 |
On Fri, 2007-02-23 at 03:49 +1030, Raymond Lewis Rebbeck wrote: |
| 2 |
> On Friday, 23 February 2007 3:15, Michael Sullivan wrote: |
| 3 |
> > I have logsentry installed on my system which sends me hourly reports |
| 4 |
> > about possible hack attempts on my three boxes. I use ipkungfu for my |
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> > firewall. I've stuck with the default configuration for ipkungfu, |
| 6 |
> > except for listing each of my machines in my LAN in the |
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> > accepted_hosts.conf file. I also set ipkungfu to drop all offensive |
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> > packets (not sure if that's the default or not.) Whenever I see someone |
| 9 |
> > trying the break in in the logsentry reports, I add their IP to the |
| 10 |
> > deny_hosts.conf file and restart ipkungfu so that the changes will take |
| 11 |
> > effect. I'm wondering why if these offending IPs in deny_hosts.conf are |
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> > being stopped at the firewall I'm still seeing them fail to authenticate |
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> > to my FTP and ssh servers? |
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> |
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> If you think you've setup your firewall to block these IPs and yet they are |
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> still able to access your machines, then it sounds like your firewall is |
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> misconfigured and isn't blocking the IPs. |
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> |
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> > Also, I've always heard that you shouldn't |
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> > have any ports open on your machine unless you have some server bound to |
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> > that port because hackers can get in through unbound open ports. Is |
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> > this true? |
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> |
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> I've never heard of this. All ports that you don't want accessible from the |
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> internet should be completely blocked by your firewall if you have it |
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> correctly configured. |
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> |
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> > If so, how does it work? What do they connect to if |
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> > nothing's running on the port they're trying? I know the concept of a |
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> > backdoor in a running program, but if no program is running on said port |
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> > for them to connect to, how do they get in??? |
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> |
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> They connect to nothing, they shouldn't be able to establish a connection. |
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> |
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> > -Michael Sullivan- |
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> |
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> |
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> |
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> -- |
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> Raymond Lewis Rebbeck |
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|
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This is my /etc/ipkungfu/ipkungfu.conf file on |
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catherine.espersunited.com . The comments have been removed for |
| 44 |
conciseness: |
| 45 |
|
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EXT_NET="eth0" |
| 47 |
LOCAL_NET="127.0.0.1" |
| 48 |
ALLOWED_TCP_IN="21 22 25 80" |
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ALLOWED_UDP_IN="" |
| 50 |
SUSPECT="DROP" |
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KNOWN_BAD="DROP" |
| 52 |
PORT_SCAN="DROP" |
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GET_IP="AUTO" |
| 54 |
DONT_DROP_IDENTD=1 |
| 55 |
WAIT_SECONDS=5 |
| 56 |
|
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Is this not a correct configuration? Here is the output of ipkungfu -l: |
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|
| 59 |
catherine ipkungfu # ipkungfu -l |
| 60 |
Chain INPUT (policy DROP 0 packets, 0 bytes) |
| 61 |
pkts bytes target prot opt in out source |
| 62 |
destination |
| 63 |
7098 2517K ACCEPT all -- any any anywhere |
| 64 |
anywhere state RELATED,ESTABLISHED |
| 65 |
0 0 LOG all -- lo any 0.0.0.1 |
| 66 |
anywhere LOG level warning prefix `IPKF IPKungFu (--init)' |
| 67 |
0 0 DROP all -- eth0 any 124.1.149.222 |
| 68 |
anywhere |
| 69 |
0 0 DROP all -- eth0 any |
| 70 |
205.158.114.117.ptr.us.xo.net anywhere |
| 71 |
0 0 DROP all -- eth0 any 222.90.206.62 |
| 72 |
anywhere |
| 73 |
0 0 DROP all -- eth0 any 61.178.185.124 |
| 74 |
anywhere |
| 75 |
0 0 DROP all -- eth0 any 65.98.76.197 |
| 76 |
anywhere |
| 77 |
0 0 DROP all -- eth0 any 211.234.99.230 |
| 78 |
anywhere |
| 79 |
0 0 DROP all -- eth0 any sd-2613.dedibox.fr |
| 80 |
anywhere |
| 81 |
0 0 DROP all -- eth0 any 222.135.146.45 |
| 82 |
anywhere |
| 83 |
0 0 DROP all -- eth0 any 210.75.200.104 |
| 84 |
anywhere |
| 85 |
0 0 DROP all -- eth0 any 210.83.48.238 |
| 86 |
anywhere |
| 87 |
0 0 DROP all -- eth0 any 69.149.231.150 |
| 88 |
anywhere |
| 89 |
0 0 DROP all -- eth0 any 61.243.90.149 |
| 90 |
anywhere |
| 91 |
0 0 DROP all -- eth0 any 222.62.149.99 |
| 92 |
anywhere |
| 93 |
0 0 DROP all -- eth0 any |
| 94 |
72.237.88.202.asianet.co.in anywhere |
| 95 |
0 0 DROP all -- eth0 any 211.61.207.31 |
| 96 |
anywhere |
| 97 |
0 0 DROP all -- eth0 any 212.14.53.4 |
| 98 |
anywhere |
| 99 |
0 0 DROP all -- eth0 any |
| 100 |
61-222-84-195.HINET-IP.hinet.net anywhere |
| 101 |
0 0 DROP all -- eth0 any smtp.tvitatiba.com.br |
| 102 |
anywhere |
| 103 |
0 0 DROP all -- eth0 any 91.25.73.211-savecom |
| 104 |
anywhere |
| 105 |
0 0 DROP all -- eth0 any |
| 106 |
host150197.metrored.net.mx anywhere |
| 107 |
0 0 DROP all -- eth0 any |
| 108 |
d5152C2AF.access.telenet.be anywhere |
| 109 |
0 0 DROP all -- eth0 any 218.50.2.99 |
| 110 |
anywhere |
| 111 |
0 0 DROP all -- eth0 any 210.97.242.17 |
| 112 |
anywhere |
| 113 |
0 0 DROP all -- eth0 any sd-156.dedibox.fr |
| 114 |
anywhere |
| 115 |
0 0 DROP all -- eth0 any |
| 116 |
lax-static-208.57.150.227.mpowercom.net anywhere |
| 117 |
0 0 DROP all -- eth0 any 61.145.175.51 |
| 118 |
anywhere |
| 119 |
0 0 DROP all -- eth0 any |
| 120 |
adsl-131.98.51.info.com.ph anywhere |
| 121 |
0 0 DROP all -- eth0 any 203.190.147.138 |
| 122 |
anywhere |
| 123 |
0 0 DROP all -- eth0 any slo-guest.not.iac.es |
| 124 |
anywhere |
| 125 |
0 0 DROP all -- eth0 any 219.94.134.39 |
| 126 |
anywhere |
| 127 |
0 0 DROP all -- eth0 any |
| 128 |
customer-201-147-235-248.uninet-ide.com.mx anywhere |
| 129 |
0 0 DROP all -- eth0 any 216.218.240.157 |
| 130 |
anywhere |
| 131 |
0 0 DROP all -- eth0 any 202.113.3.104 |
| 132 |
anywhere |
| 133 |
0 0 DROP all -- eth0 any 60.12.225.7 |
| 134 |
anywhere |
| 135 |
0 0 DROP all -- eth0 any 61.142.175.65 |
| 136 |
anywhere |
| 137 |
0 0 DROP all -- eth0 any 219.235.231.105 |
| 138 |
anywhere |
| 139 |
0 0 DROP all -- eth0 any 219.148.237.109 |
| 140 |
anywhere |
| 141 |
0 0 DROP all -- eth0 any |
| 142 |
s15192846.onlinehome-server.info anywhere |
| 143 |
0 0 DROP all -- eth0 any 219.234.80.58 |
| 144 |
anywhere |
| 145 |
0 0 DROP all -- eth0 any 61.167.117.140 |
| 146 |
anywhere |
| 147 |
0 0 DROP all -- eth0 any 61.139.78.2 |
| 148 |
anywhere |
| 149 |
0 0 DROP all -- eth0 any 219.232.59.181 |
| 150 |
anywhere |
| 151 |
0 0 DROP all -- eth0 any 222.36.2.100 |
| 152 |
anywhere |
| 153 |
0 0 DROP all -- eth0 any 218.5.4.236 |
| 154 |
anywhere |
| 155 |
0 0 DROP all -- eth0 any |
| 156 |
static-81-219-251-66.devs.futuro.pl anywhere |
| 157 |
0 0 DROP all -- eth0 any 222.216.204.101 |
| 158 |
anywhere |
| 159 |
0 0 DROP all -- eth0 any 203.71.2.73 |
| 160 |
anywhere |
| 161 |
0 0 DROP all -- eth0 any 125.251.149.66 |
| 162 |
anywhere |
| 163 |
0 0 DROP all -- eth0 any |
| 164 |
61-218-62-150.HINET-IP.hinet.net anywhere |
| 165 |
0 0 DROP all -- eth0 any 196.46.235.118 |
| 166 |
anywhere |
| 167 |
0 0 DROP all -- eth0 any |
| 168 |
static-71-166-159-154.washdc.east.verizon.net anywhere |
| 169 |
0 0 DROP all -- eth0 any 222.122.20.110 |
| 170 |
anywhere |
| 171 |
0 0 DROP all -- eth0 any |
| 172 |
200-91-244-86-host.ifx.net.co anywhere |
| 173 |
0 0 DROP all -- eth0 any 219.235.231.103 |
| 174 |
anywhere |
| 175 |
0 0 DROP all -- eth0 any host54.77.cable1.evro.net |
| 176 |
anywhere |
| 177 |
0 0 DROP all -- eth0 any 203.149.62.140 |
| 178 |
anywhere |
| 179 |
0 0 DROP all -- eth0 any jerkface.org |
| 180 |
anywhere |
| 181 |
0 0 DROP all -- eth0 any |
| 182 |
mailscanner.net-rosas.com.br anywhere |
| 183 |
0 0 DROP all -- eth0 any tm.net.my |
| 184 |
anywhere |
| 185 |
0 0 DROP all -- eth0 any mail.iab.com.ar |
| 186 |
anywhere |
| 187 |
0 0 DROP all -- eth0 any 202.122.16.35 |
| 188 |
anywhere |
| 189 |
0 0 DROP all -- eth0 any 218.78.209.253 |
| 190 |
anywhere |
| 191 |
0 0 DROP all -- eth0 any |
| 192 |
59-106-20-54.r-bl100.sakura.ne.jp anywhere |
| 193 |
0 0 DROP all -- eth0 any |
| 194 |
gcg62.internetdsl.tpnet.pl anywhere |
| 195 |
0 0 DROP all -- eth0 any se.ramm.net |
| 196 |
anywhere |
| 197 |
0 0 DROP all -- eth0 any 210.94.6.89 |
| 198 |
anywhere |
| 199 |
0 0 DROP all -- eth0 any 203.127.35.166 |
| 200 |
anywhere |
| 201 |
0 0 DROP all -- eth0 any |
| 202 |
59-106-20-94.r-bl100.sakura.ne.jp anywhere |
| 203 |
0 0 DROP all -- eth0 any 124.1.35.2 |
| 204 |
anywhere |
| 205 |
0 0 DROP all -- eth0 any 196.12.53.52 |
| 206 |
anywhere |
| 207 |
0 0 DROP all -- eth0 any 64.27.28.229 |
| 208 |
anywhere |
| 209 |
0 0 DROP all -- eth0 any 125.243.145.2 |
| 210 |
anywhere |
| 211 |
0 0 DROP all -- eth0 any |
| 212 |
53.subnet216.astinet.telkom.net.id anywhere |
| 213 |
0 0 DROP all -- eth0 any 65.205.238.12 |
| 214 |
anywhere |
| 215 |
0 0 DROP all -- eth0 any 221.136.78.17 |
| 216 |
anywhere |
| 217 |
0 0 DROP all -- eth0 any 85.132.13.186 |
| 218 |
anywhere |
| 219 |
0 0 DROP all -- eth0 any p87-237.cmet.net |
| 220 |
anywhere |
| 221 |
0 0 DROP all -- eth0 any p87-237.cmet.net |
| 222 |
anywhere |
| 223 |
0 0 DROP all -- eth0 any 61.129.41.20 |
| 224 |
anywhere |
| 225 |
0 0 DROP all -- eth0 any |
| 226 |
host-87-74-30-140.bulldogdsl.com anywhere |
| 227 |
0 0 DROP all -- eth0 any 212.144.240.140 |
| 228 |
anywhere |
| 229 |
0 0 DROP all -- eth0 any 159.226.234.16 |
| 230 |
anywhere |
| 231 |
0 0 DROP all -- eth0 any 222.138.97.20 |
| 232 |
anywhere |
| 233 |
0 0 DROP all -- eth0 any 61.152.169.150 |
| 234 |
anywhere |
| 235 |
0 0 DROP all -- eth0 any |
| 236 |
dsl51B7DB9D.fixip.t-online.hu anywhere |
| 237 |
0 0 DROP all -- eth0 any 80-239-2-89.tjgroup.no |
| 238 |
anywhere |
| 239 |
0 0 DROP all -- eth0 any |
| 240 |
host64-231-149-62.serverdedicati.aruba.it anywhere |
| 241 |
0 0 DROP all -- eth0 any |
| 242 |
62-148-177-206-hosted-by.denit.net anywhere |
| 243 |
0 0 DROP all -- eth0 any 211.176.61.119 |
| 244 |
anywhere |
| 245 |
0 0 DROP all -- eth0 any 61.136.143.176 |
| 246 |
anywhere |
| 247 |
0 0 DROP all -- eth0 any 216.17.96.152 |
| 248 |
anywhere |
| 249 |
0 0 DROP all -- eth0 any 61.125.24.84 |
| 250 |
anywhere |
| 251 |
0 0 DROP all -- eth0 any 125.248.148.10 |
| 252 |
anywhere |
| 253 |
0 0 DROP all -- eth0 any oa |
| 254 |
anywhere |
| 255 |
0 0 DROP all -- eth0 any 125.246.65.136 |
| 256 |
anywhere |
| 257 |
0 0 DROP all -- eth0 any 202.79.208.131 |
| 258 |
anywhere |
| 259 |
0 0 DROP all -- eth0 any 124.128.157.98 |
| 260 |
anywhere |
| 261 |
0 0 DROP all -- eth0 any main.popligroup.com |
| 262 |
anywhere |
| 263 |
0 0 DROP all -- eth0 any 125.152.17.236 |
| 264 |
anywhere |
| 265 |
0 0 DROP all -- eth0 any mail.triple-eagle.com |
| 266 |
anywhere |
| 267 |
0 0 DROP all -- eth0 any 211.99.140.229 |
| 268 |
anywhere |
| 269 |
0 0 DROP all -- eth0 any |
| 270 |
216.31.131.61.broad.dynamic.pt.fj.cndata.com anywhere |
| 271 |
0 0 DROP all -- eth0 any 125.244.116.130 |
| 272 |
anywhere |
| 273 |
5 302 ACCEPT all -- any any bullet.espersunited.com |
| 274 |
anywhere |
| 275 |
2 248 ACCEPT all -- any any camille.espersunited.com |
| 276 |
anywhere |
| 277 |
0 0 DROP all -- any any anywhere |
| 278 |
anywhere recent: CHECK seconds: 120 name: badguy side: |
| 279 |
source |
| 280 |
0 0 LOG tcp -- eth0 any anywhere |
| 281 |
anywhere tcp |
| 282 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,PSH,ACK,URG limit: avg 3/sec |
| 283 |
burst 5 LOG level warning prefix `IPKF flags ALL: ' |
| 284 |
0 0 LOG tcp -- eth0 any anywhere |
| 285 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE limit: avg |
| 286 |
3/sec burst 5 LOG level warning prefix `IPKF flags NONE: ' |
| 287 |
0 0 LOG tcp -- eth0 any anywhere |
| 288 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN,PSH,URG limit: |
| 289 |
avg 3/sec burst 5 LOG level warning prefix `IPKF PORTSCAN (nmap XMAS): |
| 290 |
' |
| 291 |
0 0 LOG tcp -- eth0 any anywhere |
| 292 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN limit: avg |
| 293 |
3/sec burst 5 LOG level warning prefix `IPKF PORTSCAN (nmap FIN): ' |
| 294 |
0 0 LOG tcp -- eth0 any anywhere |
| 295 |
anywhere tcp flags:FIN,SYN/FIN,SYN limit: avg 3/sec burst 5 |
| 296 |
LOG level warning prefix `IPKF flags SYN,FIN: ' |
| 297 |
0 0 LOG tcp -- eth0 any anywhere |
| 298 |
anywhere tcp flags:SYN,RST/SYN,RST limit: avg 3/sec burst 5 |
| 299 |
LOG level warning prefix `IPKF flags SYN,RST: ' |
| 300 |
0 0 LOG tcp -- eth0 any anywhere |
| 301 |
anywhere tcp |
| 302 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,ACK,URG limit: avg 3/sec burst |
| 303 |
5 LOG level warning prefix `IPKF SYN,RST,ACK,FIN,URG: ' |
| 304 |
0 0 LOG tcp -- eth0 any anywhere |
| 305 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE limit: avg |
| 306 |
3/sec burst 5 LOG level warning prefix `IPKF PORTSCAN (nmap NULL): ' |
| 307 |
0 0 DROP tcp -- eth0 any anywhere |
| 308 |
anywhere tcp |
| 309 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,ACK,URG |
| 310 |
0 0 DROP tcp -- eth0 any anywhere |
| 311 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE |
| 312 |
0 0 DROP tcp -- eth0 any anywhere |
| 313 |
anywhere tcp flags:FIN,SYN/FIN,SYN |
| 314 |
0 0 DROP tcp -- eth0 any anywhere |
| 315 |
anywhere tcp flags:SYN,RST/SYN,RST |
| 316 |
0 0 DROP tcp -- eth0 any anywhere |
| 317 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN,PSH,URG |
| 318 |
0 0 DROP tcp -- eth0 any anywhere |
| 319 |
anywhere tcp |
| 320 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,PSH,ACK,URG |
| 321 |
0 0 DROP tcp -- eth0 any anywhere |
| 322 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN |
| 323 |
0 0 DROP tcp -- eth0 any anywhere |
| 324 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE |
| 325 |
1 92 ACCEPT icmp -- any any anywhere |
| 326 |
anywhere icmp echo-request |
| 327 |
10 400 LOG all -- any any anywhere |
| 328 |
anywhere state INVALID limit: avg 3/sec burst 5 LOG level |
| 329 |
warning prefix `IPKF Invalid TCP flag: ' |
| 330 |
10 400 DROP all -- any any anywhere |
| 331 |
anywhere state INVALID |
| 332 |
0 0 LOG all -f eth0 any anywhere |
| 333 |
anywhere limit: avg 3/sec burst 5 LOG level warning prefix |
| 334 |
`IPKF Fragmented Packet: ' |
| 335 |
0 0 DROP all -f eth0 any anywhere |
| 336 |
anywhere |
| 337 |
0 0 LOG icmp -- eth0 any anywhere |
| 338 |
anywhere icmp timestamp-request limit: avg 3/sec burst 5 LOG |
| 339 |
level warning prefix `IPKF ICMP Timestamp: ' |
| 340 |
0 0 DROP icmp -- eth0 any anywhere |
| 341 |
anywhere icmp timestamp-request |
| 342 |
4 192 syn-flood tcp -- eth0 any anywhere |
| 343 |
anywhere tcp flags:FIN,SYN,RST,ACK/SYN |
| 344 |
0 0 LOG tcp -- eth0 any anywhere |
| 345 |
anywhere tcp flags:!SYN,RST,ACK/SYN state NEW limit: avg |
| 346 |
3/sec burst 5 LOG level warning prefix `IPKF New Not SYN: ' |
| 347 |
0 0 DROP tcp -- eth0 any anywhere |
| 348 |
anywhere tcp flags:!SYN,RST,ACK/SYN state NEW |
| 349 |
0 0 DROP tcp -- eth0 any anywhere |
| 350 |
anywhere multiport dports netbios-ns,6666 |
| 351 |
1 404 DROP udp -- eth0 any anywhere |
| 352 |
anywhere multiport dports ms-sql-m |
| 353 |
2 96 ACCEPT tcp -- eth0 any anywhere |
| 354 |
anywhere state NEW multiport dports ftp,ssh,smtp,http |
| 355 |
37 3156 ACCEPT all -- lo any anywhere |
| 356 |
anywhere state NEW |
| 357 |
0 0 ACCEPT all -- lo any localhost.localdomain |
| 358 |
anywhere state NEW |
| 359 |
0 0 REJECT tcp -- any any anywhere |
| 360 |
anywhere tcp dpt:auth reject-with tcp-reset |
| 361 |
36 11218 LOG !icmp -- any any anywhere |
| 362 |
anywhere limit: avg 3/sec burst 5 LOG level warning prefix |
| 363 |
`IPKF INPUT Catch-all: ' |
| 364 |
36 11218 DROP all -- any any anywhere |
| 365 |
anywhere |
| 366 |
|
| 367 |
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) |
| 368 |
pkts bytes target prot opt in out source |
| 369 |
destination |
| 370 |
0 0 ACCEPT all -- any any anywhere |
| 371 |
anywhere state RELATED,ESTABLISHED |
| 372 |
0 0 ACCEPT all -- eth0 any bullet.espersunited.com |
| 373 |
anywhere |
| 374 |
0 0 ACCEPT all -- eth0 any camille.espersunited.com |
| 375 |
anywhere |
| 376 |
0 0 DROP all -- eth0 any anywhere |
| 377 |
anywhere recent: CHECK seconds: 120 name: badguy side: |
| 378 |
source |
| 379 |
0 0 LOG tcp -- eth0 any anywhere |
| 380 |
anywhere tcp |
| 381 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,PSH,ACK,URG limit: avg 3/sec |
| 382 |
burst 5 LOG level warning prefix `IPKF flags ALL: ' |
| 383 |
0 0 LOG tcp -- eth0 any anywhere |
| 384 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE limit: avg |
| 385 |
3/sec burst 5 LOG level warning prefix `IPKF flags NONE: ' |
| 386 |
0 0 LOG tcp -- eth0 any anywhere |
| 387 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN,PSH,URG limit: |
| 388 |
avg 3/sec burst 5 LOG level warning prefix `IPKF flags FIN,URG,PSH: ' |
| 389 |
0 0 LOG tcp -- eth0 any anywhere |
| 390 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN limit: avg |
| 391 |
3/sec burst 5 LOG level warning prefix `IPKF PORTSCAN (nmap XMAS): ' |
| 392 |
0 0 LOG tcp -- eth0 any anywhere |
| 393 |
anywhere tcp flags:FIN,SYN/FIN,SYN limit: avg 3/sec burst 5 |
| 394 |
LOG level warning prefix `IPKF flags SYN,FIN: ' |
| 395 |
0 0 LOG tcp -- eth0 any anywhere |
| 396 |
anywhere tcp flags:SYN,RST/SYN,RST limit: avg 3/sec burst 5 |
| 397 |
LOG level warning prefix `IPKF flags SYN,RST: ' |
| 398 |
0 0 LOG tcp -- eth0 any anywhere |
| 399 |
anywhere tcp |
| 400 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,ACK,URG limit: avg 3/sec burst |
| 401 |
5 LOG level warning prefix `IPKF SYN,RST,ACK,FIN,URG: ' |
| 402 |
0 0 LOG tcp -- eth0 any anywhere |
| 403 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE limit: avg |
| 404 |
3/sec burst 5 LOG level warning prefix `IPKF PORTSCAN (nmap NULL): ' |
| 405 |
0 0 DROP tcp -- eth0 any anywhere |
| 406 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE |
| 407 |
0 0 DROP tcp -- eth0 any anywhere |
| 408 |
anywhere tcp |
| 409 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,ACK,URG |
| 410 |
0 0 DROP tcp -- eth0 any anywhere |
| 411 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/NONE |
| 412 |
0 0 DROP tcp -- eth0 any anywhere |
| 413 |
anywhere tcp flags:FIN,SYN/FIN,SYN |
| 414 |
0 0 DROP tcp -- eth0 any anywhere |
| 415 |
anywhere tcp flags:SYN,RST/SYN,RST |
| 416 |
0 0 DROP tcp -- eth0 any anywhere |
| 417 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN,PSH,URG |
| 418 |
0 0 DROP tcp -- eth0 any anywhere |
| 419 |
anywhere tcp |
| 420 |
flags:FIN,SYN,RST,PSH,ACK,URG/FIN,SYN,RST,PSH,ACK,URG |
| 421 |
0 0 DROP tcp -- eth0 any anywhere |
| 422 |
anywhere tcp flags:FIN,SYN,RST,PSH,ACK,URG/FIN |
| 423 |
0 0 LOG all -- eth0 any anywhere |
| 424 |
anywhere state INVALID limit: avg 3/sec burst 5 LOG level |
| 425 |
warning prefix `IPKF Invalid TCP flag: ' |
| 426 |
0 0 DROP all -- eth0 any anywhere |
| 427 |
anywhere state INVALID |
| 428 |
0 0 LOG all -f eth0 any anywhere |
| 429 |
anywhere limit: avg 3/sec burst 5 LOG level warning prefix |
| 430 |
`IPKF Fragmented Packet: ' |
| 431 |
0 0 DROP all -f eth0 any anywhere |
| 432 |
anywhere |
| 433 |
0 0 LOG icmp -- eth0 any anywhere |
| 434 |
anywhere icmp timestamp-request limit: avg 3/sec burst 5 LOG |
| 435 |
level warning prefix `IPKF ICMP Timestamp: ' |
| 436 |
0 0 DROP icmp -- eth0 any anywhere |
| 437 |
anywhere icmp timestamp-request |
| 438 |
0 0 syn-flood tcp -- eth0 any anywhere |
| 439 |
anywhere tcp flags:FIN,SYN,RST,ACK/SYN |
| 440 |
0 0 LOG tcp -- eth0 any anywhere |
| 441 |
anywhere tcp flags:!SYN,RST,ACK/SYN state NEW limit: avg |
| 442 |
3/sec burst 5 LOG level warning prefix `IPKF New Not SYN: ' |
| 443 |
0 0 DROP tcp -- eth0 any anywhere |
| 444 |
anywhere tcp flags:!SYN,RST,ACK/SYN state NEW |
| 445 |
0 0 DROP tcp -- eth0 any anywhere |
| 446 |
anywhere multiport dports netbios-ns,6666 |
| 447 |
0 0 DROP udp -- eth0 any anywhere |
| 448 |
anywhere multiport dports ms-sql-m |
| 449 |
0 0 REJECT tcp -- eth0 any anywhere |
| 450 |
anywhere tcp dpt:auth reject-with tcp-reset |
| 451 |
|
| 452 |
Chain OUTPUT (policy ACCEPT 3 packets, 120 bytes) |
| 453 |
pkts bytes target prot opt in out source |
| 454 |
destination |
| 455 |
6646 1321K ACCEPT all -- any any anywhere |
| 456 |
anywhere state RELATED,ESTABLISHED |
| 457 |
513 31858 ACCEPT all -- any any anywhere |
| 458 |
anywhere state NEW |
| 459 |
|
| 460 |
Chain syn-flood (2 references) |
| 461 |
pkts bytes target prot opt in out source |
| 462 |
destination |
| 463 |
4 192 RETURN all -- any any anywhere |
| 464 |
anywhere limit: avg 10/sec burst 24 |
| 465 |
0 0 LOG all -- any any anywhere |
| 466 |
anywhere limit: avg 3/sec burst 5 LOG level warning prefix |
| 467 |
`IPKF SYN flood: ' |
| 468 |
0 0 DROP all -- any any anywhere |
| 469 |
anywhere |
| 470 |
|
| 471 |
|
| 472 |
I don't understand a lot of this, but those IP addresses are from |
| 473 |
my /etc/ipkungfu/deny_hosts.conf file. Is this not actually blocking |
| 474 |
them? I almost always read about connections from (a) recently-blocked |
| 475 |
IP address(es) for a few hours after I block them in the hourly |
| 476 |
logsentry reports... |
| 477 |
|
| 478 |
-- |
| 479 |
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