オプションのポート番号を使用した IP アドレスの正規表現があります。何もない場合、または何かがある場合は、オプションのポート番号を持つ有効な IP でなければならない場合に一致するように変更する必要があります。
私の正規表現は...
\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b[.: ]?[0-9]?[0=9]?[0-9]?[0-9]?[0=9]?
注: 最大ポート番号が 65535 であるのに対して 99999 を入力することは可能であるため、オプションのポート番号のチェックは理想的ではありませんが、現時点ではそれで問題ありません。
これを試して：
^(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:[.:]\b([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?$
説明
# ^(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(?:[.:]\b([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?$
#
# Assert position at the beginning of the string «^»
# Match the regular expression below «(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}»
# Exactly 3 times «{3}»
# Match the regular expression below «(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])»
# Match either the regular expression below (attempting the next alternative only if this one fails) «25[0-5]»
# Match the characters “25” literally «25»
# Match a single character in the range between “0” and “5” «[0-5]»
# Or match regular expression number 2 below (attempting the next alternative only if this one fails) «2[0-4][0-9]»
# Match the character “2” literally «2»
# Match a single character in the range between “0” and “4” «[0-4]»
# Match a single character in the range between “0” and “9” «[0-9]»
# Or match regular expression number 3 below (attempting the next alternative only if this one fails) «1[0-9][0-9]»
# Match the character “1” literally «1»
# Match a single character in the range between “0” and “9” «[0-9]»
# Match a single character in the range between “0” and “9” «[0-9]»
# Or match regular expression number 4 below (the entire group fails if this one fails to match) «[1-9]?[0-9]»
# Match a single character in the range between “1” and “9” «[1-9]?»
# Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
# Match a single character in the range between “0” and “9” «[0-9]»
# Match the character “.” literally «\.»
# Match the regular expression below «(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])»
# Match either the regular expression below (attempting the next alternative only if this one fails) «25[0-5]»
# Match the characters “25” literally «25»
# Match a single character in the range between “0” and “5” «[0-5]»
# Or match regular expression number 2 below (attempting the next alternative only if this one fails) «2[0-4][0-9]»
# Match the character “2” literally «2»
# Match a single character in the range between “0” and “4” «[0-4]»
# Match a single character in the range between “0” and “9” «[0-9]»
# Or match regular expression number 3 below (attempting the next alternative only if this one fails) «1[0-9][0-9]»
# Match the character “1” literally «1»
# Match a single character in the range between “0” and “9” «[0-9]»
# Match a single character in the range between “0” and “9” «[0-9]»
# Or match regular expression number 4 below (the entire group fails if this one fails to match) «[1-9]?[0-9]»
# Match a single character in the range between “1” and “9” «[1-9]?»
# Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
# Match a single character in the range between “0” and “9” «[0-9]»
# Match the regular expression below «(?:[.:]\b([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5]))?»
# Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
# Match a single character present in the list “.:” «[.:]»
# Assert position at a word boundary «\b»
# Match the regular expression below and capture its match into backreference number 1 «([1-9][0-9]{0,3}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])»
# Match either the regular expression below (attempting the next alternative only if this one fails) «[1-9][0-9]{0,3}»
# Match a single character in the range between “1” and “9” «[1-9]»
# Match a single character in the range between “0” and “9” «[0-9]{0,3}»
# Between zero and 3 times, as many times as possible, giving back as needed (greedy) «{0,3}»
# Or match regular expression number 2 below (attempting the next alternative only if this one fails) «[1-5][0-9]{4}»
# Match a single character in the range between “1” and “5” «[1-5]»
# Match a single character in the range between “0” and “9” «[0-9]{4}»
# Exactly 4 times «{4}»
# Or match regular expression number 3 below (attempting the next alternative only if this one fails) «6[0-4][0-9]{3}»
# Match the character “6” literally «6»
# Match a single character in the range between “0” and “4” «[0-4]»
# Match a single character in the range between “0” and “9” «[0-9]{3}»
# Exactly 3 times «{3}»
# Or match regular expression number 4 below (attempting the next alternative only if this one fails) «65[0-4][0-9]{2}»
# Match the characters “65” literally «65»
# Match a single character in the range between “0” and “4” «[0-4]»
# Match a single character in the range between “0” and “9” «[0-9]{2}»
# Exactly 2 times «{2}»
# Or match regular expression number 5 below (attempting the next alternative only if this one fails) «655[0-2][0-9]»
# Match the characters “655” literally «655»
# Match a single character in the range between “0” and “2” «[0-2]»
# Match a single character in the range between “0” and “9” «[0-9]»
# Or match regular expression number 6 below (the entire group fails if this one fails to match) «6553[0-5]»
# Match the characters “6553” literally «6553»
# Match a single character in the range between “0” and “5” «[0-5]»
# Assert position at the end of the string (or before the line break at the end of the string, if any) «$»