Postado originalmente por
catvbrasil
Cara no lugar deste /30, utiliza /24 (até 254 ips). Olha abaixo como funciona as classes de IP.
As seguintes máscaras de rede são permitidas numa Classe C, veja a tabela com máscara, máscara em bits e quantidade de IPs e o IP da rede e do Broadcast:
IP Rede Broadcast Máscara Bits #IPs
.0 .255 255.255.255.0 /24 254
.0 .127 255.255.255.128 /25 126
.128 .255 255.255.255.128 /25 126
.0 .63 255.255.255.192 /26 62
.64 .127 255.255.255.192 /26 62
.128 .191 255.255.255.192 /26 62
.192 .255 255.255.255.192 /26 62
.0 .31 255.255.255.224 /27 30
.32 .63 255.255.255.224 /27 30
.64 .95 255.255.255.224 /27 30
.96 .127 255.255.255.224 /27 30
.128 .159 255.255.255.224 /27 30
.160 .191 255.255.255.224 /27 30
.192 .223 255.255.255.224 /27 30
.224 .255 255.255.255.224 /27 30
.0 .15 255.255.255.240 /28 14
.16 .31 255.255.255.240 /28 14
.32 .47 255.255.255.240 /28 14
.48 .63 255.255.255.240 /28 14
.64 .79 255.255.255.240 /28 14
.80 .95 255.255.255.240 /28 14
.96 .111 255.255.255.240 /28 14
.112 .127 255.255.255.240 /28 14
.128 .143 255.255.255.240 /28 14
.144 .159 255.255.255.240 /28 14
.160 .175 255.255.255.240 /28 14
.176 .191 255.255.255.240 /28 14
.192 .207 255.255.255.240 /28 14
.208 .223 255.255.255.240 /28 14
.224 .239 255.255.255.240 /28 14
.240 .255 255.255.255.240 /28 14
.0 .7 255.255.255.248 /29 6
.8 .15 255.255.255.248 /29 6
.16 .23 255.255.255.248 /29 6
.24 .31 255.255.255.248 /29 6
.32 .39 255.255.255.248 /29 6
.40 .47 255.255.255.248 /29 6
.48 .55 255.255.255.248 /29 6
.56 .63 255.255.255.248 /29 6
.64 .71 255.255.255.248 /29 6
.72 .79 255.255.255.248 /29 6
.80 .87 255.255.255.248 /29 6
.88 .95 255.255.255.248 /29 6
.96 .103 255.255.255.248 /29 6
.104 .111 255.255.255.248 /29 6
.112 .119 255.255.255.248 /29 6
.120 .127 255.255.255.248 /29 6
.128 .135 255.255.255.248 /29 6
.136 .143 255.255.255.248 /29 6
.144 .151 255.255.255.248 /29 6
.152 .159 255.255.255.248 /29 6
.160 .167 255.255.255.248 /29 6
.168 .175 255.255.255.248 /29 6
.176 .183 255.255.255.248 /29 6
.184 .191 255.255.255.248 /29 6
.192 .199 255.255.255.248 /29 6
.200 .207 255.255.255.248 /29 6
.208 .215 255.255.255.248 /29 6
.216 .223 255.255.255.248 /29 6
.224 .231 255.255.255.248 /29 6
.232 .239 255.255.255.248 /29 6
.240 .247 255.255.255.248 /29 6
.248 .255 255.255.255.248 /29 6
.0 .3 255.255.255.252 /30 2
.4 .7 255.255.255.252 /30 2
.8 .11 255.255.255.252 /30 2
.12 .15 255.255.255.252 /30 2
.16 .19 255.255.255.252 /30 2
.20 .23 255.255.255.252 /30 2
.24 .27 255.255.255.252 /30 2
.28 .31 255.255.255.252 /30 2
.32 .35 255.255.255.252 /30 2
.36 .39 255.255.255.252 /30 2
.40 .43 255.255.255.252 /30 2
.44 .47 255.255.255.252 /30 2
.48 .51 255.255.255.252 /30 2
.52 .55 255.255.255.252 /30 2
.56 .59 255.255.255.252 /30 2
.60 .63 255.255.255.252 /30 2
.64 .67 255.255.255.252 /30 2
.68 .71 255.255.255.252 /30 2
.72 .75 255.255.255.252 /30 2
.76 .79 255.255.255.252 /30 2
.80 .83 255.255.255.252 /30 2
.84 .87 255.255.255.252 /30 2
.88 .91 255.255.255.252 /30 2
.92 .95 255.255.255.252 /30 2
.96 .99 255.255.255.252 /30 2
.100 .103 255.255.255.252 /30 2
.104 .107 255.255.255.252 /30 2
.108 .111 255.255.255.252 /30 2
.112 .115 255.255.255.252 /30 2
.116 .119 255.255.255.252 /30 2
.120 .123 255.255.255.252 /30 2
.124 .127 255.255.255.252 /30 2
.128 .131 255.255.255.252 /30 2
.132 .135 255.255.255.252 /30 2
.136 .139 255.255.255.252 /30 2
.140 .143 255.255.255.252 /30 2
.144 .147 255.255.255.252 /30 2
.148 .151 255.255.255.252 /30 2
.152 .155 255.255.255.252 /30 2
.156 .159 255.255.255.252 /30 2
.160 .163 255.255.255.252 /30 2
.164 .167 255.255.255.252 /30 2
.168 .171 255.255.255.252 /30 2
.172 .175 255.255.255.252 /30 2
.176 .179 255.255.255.252 /30 2
.180 .183 255.255.255.252 /30 2
.184 .187 255.255.255.252 /30 2
.188 .191 255.255.255.252 /30 2
.192 .195 255.255.255.252 /30 2
.196 .199 255.255.255.252 /30 2
.200 .203 255.255.255.252 /30 2
.204 .207 255.255.255.252 /30 2
.208 .211 255.255.255.252 /30 2
.212 .215 255.255.255.252 /30 2
.216 .219 255.255.255.252 /30 2
.220 .223 255.255.255.252 /30 2
.224 .227 255.255.255.252 /30 2
.228 .231 255.255.255.252 /30 2
.232 .235 255.255.255.252 /30 2
.236 .239 255.255.255.252 /30 2
.240 .243 255.255.255.252 /30 2
.244 .247 255.255.255.252 /30 2
.248 .251 255.255.255.252 /30 2
.252 .255 255.255.255.252 /30 2
Troca ae para o final 0/24. Verifica e posta o resultado.